springboot笔记【概念，核心配置，源码包，第三方包】资源-CSDN文库

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【古墓】SpringBoot = 概念.................................................................................................1

SpringBoot .........................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

xsl-fo ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【游戏厅】SpringBoot = 核心配置 ......................................................................................1

配置加载 ...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

application.yml ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

spring.factories ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【老街】SpringBoot = org.springframework.boot（源码包） .......................................1

原始包..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

SpringApplication...............................................................................................................................................................................................................................................................................................................................................................................................................................................................1

SpringApplicationRunListener............................................................................................................................................................................................................................................................................................................................................................................................................................................1

CommandLineRunner ........................................................................................................................................................................................................................................................................................................................................................................................................................................................1

ApplicationRunner .............................................................................................................................................................................................................................................................................................................................................................................................................................................................1

WebApplicationType .........................................................................................................................................................................................................................................................................................................................................................................................................................................................1

SpringBootVersion .............................................................................................................................................................................................................................................................................................................................................................................................................................................................1

web......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

RegistrationBean................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

DynamicRegistrationBean..................................................................................................................................................................................................................................................................................................................................................................................................................................................1

AbstractFilterRegistrationBean..........................................................................................................................................................................................................................................................................................................................................................................................................................................1

FilterRegistrationBean .......................................................................................................................................................................................................................................................................................................................................................................................................................................................1

注解 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

test.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

context ...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

ApplicationContextInitializer .............................................................................................................................................................................................................................................................................................................................................................................................................................................1

ApplicationListener ............................................................................................................................................................................................................................................................................................................................................................................................................................................................1

ConfigurationPropertiesBindingPostProcessor..................................................................................................................................................................................................................................................................................................................................................................................................................1

SpringApplicationEvent......................................................................................................................................................................................................................................................................................................................................................................................................................................................1

autoconfigure ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

AutoConfigurationImportSelector .....................................................................................................................................................................................................................................................................................................................................................................................................................................1

security...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

scheduling.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

AsyncConfigurer.................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【医疗仓】SpringBoot = org.springframework.cloud（SpringCloud 源码包）............1

loadbalancer ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

RoundRobinLoadBalancer..................................................................................................................................................................................................................................................................................................................................................................................................................................................1

openfeign..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

BaseRequestInterceptor ....................................................................................................................................................................................................................................................................................................................................................................................................................................................1

FeignAcceptGzipEncodingInterceptor ...............................................................................................................................................................................................................................................................................................................................................................................................................................1

FeignContentGzipEncodingInterceptor .............................................................................................................................................................................................................................................................................................................................................................................................................................1

【卧房】SpringBoot = 第三方包..........................................................................................1

【卧房-罐子】核心 ...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

启动类 ...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

添加核心依赖 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

父工程依赖管理 ..............................................................................................................................................................................................................................................................................................................................................................................................................................................................1

自定义启动器 starter........................................................................................................................................................................................................................................................................................................................................................................................................................................................1

spring-cloud-starter-bootstrap（配置） ..........................................................................................................................................................................................................................................................................................................................................................................................................................1

spring-boot-devtools（开发）..........................................................................................................................................................................................................................................................................................................................................................................................................................................1

spring-boot-starter-actuator（监控）..............................................................................................................................................................................................................................................................................................................................................................................................................................1

spring-boot-admin-starter-server（监控）......................................................................................................................................................................................................................................................................................................................................................................................................................1

【卧房-镜子】数据存储...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mybatis ..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

原理..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mybatis-3.5.3 源码解析......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mybatis-spring-2.0.3 源码解析 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mybatis-3.4.5 源码解析......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

test 使用 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mybatis 使用.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

配置项 .....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mybatis-plus.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

pagehelper.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mybatis 逆向生成..............................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mybatis-plus 逆向生成代码..............................................................................................................................................................................................................................................................................................................................................................................................................................................1

jpa ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

entity 使用 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

entityListener 使用..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

dao 使用.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

repository 使用 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mongo................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

radis ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

rabbitmq ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

activemq ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

kafka...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

elasticsearch ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

zookeeper ..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

mysql-connector-java ........................................................................................................................................................................................................................................................................................................................................................................................................................................................1

spring-boot-starter-data-jdbc ............................................................................................................................................................................................................................................................................................................................................................................................................................................1

sprint-boot-starter-data-jpa ..............................................................................................................................................................................................................................................................................................................................................................................................................................................1

druid...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

c3p0 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【卧房-遮帘】安全 ...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

java-jwt ..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

rsa ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

spring-security-acl（jar） .................................................................................................................................................................................................................................................................................................................................................................................................................................................1

jasypt-spring-boot-starter..................................................................................................................................................................................................................................................................................................................................................................................................................................................1

spire.xls.free.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【卧房-灯笼】微服务.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

Ribbon 负载均衡...............................................................................................................................................................................................................................................................................................................................................................................................................................................................1

Feign 服务调用..................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

Hystrix 熔断器...................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【卧房-凳子】功能扩展...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

junit....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

aop .....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

概念..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

源码解析 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

使用..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

netty...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

reactor ...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

swagger..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

sprongdoc-openapi-ui........................................................................................................................................................................................................................................................................................................................................................................................................................................................1

velocity...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

thymeleaf...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

servlet ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

webflux ..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

logging................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

com.fasterxml.jackson .......................................................................................................................................................................................................................................................................................................................................................................................................................................................1

javers-core .........................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

ehcache..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

dockerfile-maven-plugin....................................................................................................................................................................................................................................................................................................................................................................................................................................................1

spring-boot-starter-mail ....................................................................................................................................................................................................................................................................................................................................................................................................................................................1

xxl-job ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

hazelcast-spring .................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

libphonenumber（电话号码） ........................................................................................................................................................................................................................................................................................................................................................................................................................................1

【卧房-床】数据工具.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

lombok ...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

fastjson ..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

jackson ...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

javers..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

dozer ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

commons-lang3 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

commons-collections4.......................................................................................................................................................................................................................................................................................................................................................................................................................................................1

commons-beanutils ...........................................................................................................................................................................................................................................................................................................................................................................................................................................................1

commons-io .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

commons-configuration2 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................1

commons-configuration ....................................................................................................................................................................................................................................................................................................................................................................................................................................................1

hutool.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

Gson...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

guava..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

joda-time............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

transmittable-thread-local.................................................................................................................................................................................................................................................................................................................................................................................................................................................1

SXSSFWorkbook.................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

hibernate-validator............................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【卧房-板子】文件处理...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

itextpdf ..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

poi-ooxml（读写 excel）..................................................................................................................................................................................................................................................................................................................................................................................................................................................1

apache-fop.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【卧房-窗户】日志 ...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

logback...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

log4j ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

log4jdbc .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【卧房-书桌】插件 ...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

maven-source-plugin（maven 工具） .............................................................................................................................................................................................................................................................................................................................................................................................................................1

maven-surefire-plugin（maven 工具）............................................................................................................................................................................................................................................................................................................................................................................................................................1

maven-compiler-plugin（maven 工具）..........................................................................................................................................................................................................................................................................................................................................................................................................................1

spring-boot-maven-plugin（项目配置） .........................................................................................................................................................................................................................................................................................................................................................................................................................1

tomcat7-maven-plugin（项目配置）...............................................................................................................................................................................................................................................................................................................................................................................................................................1

jfx 图形化 ..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................1

【古墓】SpringBoot = 概念

SpringBoot

自动装配原理： @SpringBootApplication 下包含注解@EnableAutoConfiguration

底层使用 AutoConfigurationImportSelector 的 getCandidateConfigurations 初始化一些 spring.factories 内的 bean

SpringApplication 启动类在开始时也会初始化一些 spring.factories 内的 bean

xsl-fo

函数 substring($data, $counter, 1) concat(a, "") length()

结构标签——————————————————————————————————————————————————

<xsl:template match="/"> 匹配所有数据对象

<xsl:apply-templates select="ProductPdfInfo" /> 数据对象

<xsl:param name="data" select="0" /> 定义变量

<xsl:template match="ProductPdfInfo"> 引用上方数据对象，也可以匹配所有数据对象

<fo:root> 根节点【xml:lang="en" 语言 xmlns:fo="http://www.w3.org/1999/XSL/Format" 指定 fo 格式化】

root 内部结构标签————————————————————————————————————————————————

<fo:layout-master-set> 页面容器

<fo:simple-page-master> 一个简单页面【master-name="tt" 页面名称】

<fo:region-body> body 容器

<fo:page-sequence> 主要内容【master-reference="tt" 对应的页面容器】

<fo:flow> 流动容器【flow-name="xsl-region-body" 对应的页面内部 body 容器】

<fo:inline-container> 行内容器【inline-progression-dimension="15.0%" 宽度占比】

<fo:block-container> 块容器

<fo:block> 块元素【keep-together.within-page="always"】

元素标签——————————————————————————————————————————————————

<fo:external-graphic> 图片元素【xf:alt-text="Citi Logo" 提示文字】

<fo:list-item> 包含列表中的每个项目

<fo:list-item-label> 包含用于 list-item 的标签 - 典型地，包含一个数字或者字符的 <fo:block>

<fo:list-item-body> 包含 list-item 的内容/主体 - 典型地，一个或多个 <fo:block> 对象

<xsl:if test="(pdfGenerationRequest/accountReconPdfData)" 存在时才渲染内部内容

<xsl:for-each select="pdfGenerationRequest/myList"> 遍历

<xsl:with-param name="achPage" select="achPage"> 引用元素对象中的字段值

<xsl:if test="position() !=last()" 索引不是最后一个时

<xsl:if test="position() >=2)" 索引大于等于 2 时

<xsl:value-of select="pdfGenerationRequest/form/accountText"> 引用 transform 中 src 的数据

<xsl:value-of select="contactNumber[phoneType='MOBILE'][position()='1'] "> 选出 phoneType='MOBILE'的数据，并且是第一个

<xsl:value-of select="pdfGenerationRequest/form/ownerships[formater:checkOwnerType(ownerType/text(), 'ACCOUNT_SIGNER') =Yes'] [signerType=''RESOLUTION_AUTHORITY"] > 调用 formater 的方法返回值

<xsl:call-template name="account-reconciliation"> 引入其他 template

公共样式——————————————————————————————————————————————————

margin-bottom="1.5cm" 下边距

margin="0 1 2 3"

text-align="center" 中间对齐

border="1px solid green" 边框

代码使用——————————————————————————————————————————————————

// Setup directories

File baseDir = new File(".");

File outDir = new File(baseDir, "out");

outDir.mkdirs();

// Setup input and output files

File xmlfile = new File(baseDir, "xml/xml/projectteam.xml");

File xsltfile = new File(baseDir, "xml/xslt/projectteam2fo.xsl");

File pdffile = new File(outDir, "ResultXML2PDF.pdf");

// configure fopFactory as desired

final FopFactory fopFactory = FopFactory.newInstance(new File(".").toURI());

FOUserAgent foUserAgent = fopFactory.newFOUserAgent();

// configure foUserAgent as desired

// Setup output

OutputStream out = new java.io.FileOutputStream(pdffile);

out = new java.io.BufferedOutputStream(out);

try {

// Construct fop with desired output format

Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);

// Setup XSLT

TransformerFactory factory = TransformerFactory.newInstance();

Transformer transformer = factory.newTransformer(new StreamSource(xsltfile)); //开始处理原始 xsl 文件

// Set the value of a <param> in the stylesheet

transformer.setParameter("versionParam", "2.0");

// Setup input for XSLT transformation（数据对象，可以是对象）

Source src = new StreamSource(xmlfile);

// Resulting SAX events (the generated FO) must be piped through to FOP

Result res = new SAXResult(fop.getDefaultHandler());

// Start XSLT transformation and FOP processing

transformer.transform(src, res);

} finally {

out.close();

}

【游戏厅】SpringBoot = 核心配置

配置加载

内部配置文件加载顺序

1. file:./config/ 当前项目下的/config 目录下（必须位于当前工程根目录，多个大工程嵌套时会找最根部的 config 目录）

2. file:./ 当前项目的根目录

3. classpath:/config/ classpath 的/config 目录

4. classpath:/ classpath 的根目录

外部配置文件加载顺序

1. jar 所在目录

application.yml

application.yml 或 application.properties 或 application.yaml 项目默认配置文件（在同一级目录下优先级为: properties > yml > yaml）

加载优先级：application-dev.yml > application.yml

YAML 语法：大小写敏感，

数值前必须有空格

缩进不能用 Tab，只能用空格

单引号字符串忽略转义'hello \n word'

server:

port: 8099 启动端口

--- 单个文件内多文件开始语法

server:

port: 8066

… 单个文件内多文件结尾语法

servlet:

context-path: /springboot-demo 访问项目根路径

multipart:

enabled: true

max-file-size: 10MB

max-request-size: 15MB

tomcat:

uri-encoding: utf-8

basedir: /usr/tmp/tomcat

accesslog:

enabled: false

directory: logs 日志文件所在目录，没有就创建，可以是绝对路径或相对路径

buffered: true 缓存输出（周期性 flush）

patterm: common 日志输出格式

suffix: .log 日志后缀

prefix: access_log 日志前缀

rotate: true 日志旋转

spring:

main:

allow-circular-references: true 关闭循环依赖

profiles:

active: dev 激活的其他的配置文件 application-dev.yml（application.yml 或 application.properties 一直生效）

mvc:

static-path-pattern: /res/** 定义根目录访问静态资源的 url 路径，在 resource 目录下（会导致 welcom 页失效，index 默认页面失效）

hiddenmethod:

filter:

enable: true 可以通过表单 psot 方式提交的值决定请求方式<input name="_method" value="put"/>

resources:

static-location: [classpath:/stac] 静态资源存放目录（favicon.ico 项目图标）

add-mappings: true 启用静态资源访问

cache:

period: 11000 缓存时间

servlet:

multipart:

max-file-size: 10MB multipart/form-dta 请求单个文件最大值

max-request-size: 100MB multipart/form-dta 请求单次请求文件总最大值

my-car: 自定义类配置（不用加引号，‘ - ’分割命名）

userName: zhangsan 字符串

boss: true 布尔值

a: [xxx, sss] 数组

arr: 数组

- xxx

- sss

obj: { a:80, b:90} 对象

obj: 对象

a: 80

b: 90

routes: 对象数组

- id: template

uri: http://127.0.0.1:8099

predicates:

- Path=/api-template/**

filters:

- StripPrefix=1

- id: generator

uri: lb://boss-generator

predicates:

- Path=/api-generator/**

filters:

- StripPrefix=1

person:

name: ${my-car.obj.a} 引用上面定义的 my-car

spring.factories

org.springframework.boot.autoconfigure.EnableAutoConfiguration=com.saidake.redis.config.MyAutoConfiguration 装载自定义自动配置类的 bean

org.springframework.context.ApplicationContextInitializer=com.saidake.redis.config.MyApplicationContextInitializer

org.springframework.boot.SpringApplicationRunListener=com.saidake.redis.config.MySpringApplicationRunListener

【老街】SpringBoot = org.springframework.boot（源码包）

原始包

SpringApplication

package org.springframework.boot;

public class SpringApplication 核心引导类，所有的事件都是在此对象上产生（2.1.17.RELEASE）

public SpringApplication(ResourceLoader resourceLoader, Class<?>... primarySources) { 构造函数

primarySources 引导类的 class

this.resourceLoader = resourceLoader;

Assert.notNull(primarySources, "PrimarySources must not be null");

this.primarySources = new LinkedHashSet<>(Arrays.asList(primarySources));

this.webApplicationType = WebApplicationType.deduceFromClasspath(); 判断 web 环境

setInitializers((Collection) getSpringFactoriesInstances(ApplicationContextInitializer.class)); 从 spring.factories 里实例化程序初始化构造器 ApplicationContextInitializer 的实现类，并设置到当前成员 initializers 中

setListeners((Collection) getSpringFactoriesInstances(ApplicationListener.class)); 从 spring.factories 里实例化程序监听器 ApplicationListener 的实现类，并设置到当前成员 listeners 中

this.mainApplicationClass = deduceMainApplicationClass(); 找到 main 函数所在类

}

public ConfigurableApplicationContext run(String... args) {

StopWatch stopWatch = new StopWatch(); 创建一个计时器

stopWatch.start(); 开始计时

ConfigurableApplicationContext context = null; 定义 IOC 容器

Collection<SpringBootExceptionReporter> exceptionReporters = new ArrayList<>(); 定义项目启动过程的异常分析器

configureHeadlessProperty(); 设置一个 java.awt.headless 系统属性，无头启动（没有显示器启动）

SpringApplicationRunListeners listeners = getRunListeners(args); 从 spring.factories 里实例化 SpringApplicationRunListener 的实现类，并放入此容器

listeners.starting(); 调用所有 SpringApplicationRunListener 的 starting 方法

try {

ApplicationArguments applicationArguments = new DefaultApplicationArguments(args); 封装应用参数信息

ConfigurableEnvironment environment = prepareEnvironment(listeners, applicationArguments); 准备环境，加载属性文件资源，调用所有 SpringApplicationRunListener 的 environmentPrepared 方法

configureIgnoreBeanInfo(environment); 通过属性 spring.beaninfo.ignore 确认是否跳过对 BeanInfo 类的搜索

Banner printedBanner = printBanner(environment); 打印 logo 图标 banner.txt

context = createApplicationContext(); 创建 IOC 容器

exceptionReporters = getSpringFactoriesInstances(SpringBootExceptionReporter.class, new Class[] { ConfigurableApplicationContext.class }, context); 从 spring.factories 里实例化 SpringBootExceptionReporter 的实现类

prepareContext(context, environment, listeners, applicationArguments, printedBanner); 准备容器，加载配置环境，ResourceLoader 资源加载器，配置监听，加载启动参数（执行后 IOC 容器创建好了，bean 还没全部加载进来）

调用所有 SpringApplicationRunListener 的 contextPrepared 和 contextLoaded 方法

refreshContext(context); 刷新容器，参照 spring 源码，准备环境所需的 bean 工厂，通过工厂产生环境所需的 bean（执行后去配置里寻找有哪些 bean 需要创建）

afterRefresh(context, applicationArguments); 空函数，可以自定义实现

stopWatch.stop(); 结束计时，计算项目启动耗时

if (this.logStartupInfo) {

new StartupInfoLogger(this.mainApplicationClass).logStarted(getApplicationLog(), stopWatch);

}

listeners.started(context); 调用所有 SpringApplicationRunListener 的 started 方法

callRunners(context, applicationArguments); 加载完成，执行 bean 监听器，调用 CommandLineRunner 和 ApplicationRunner

} catch (Throwable ex) {

handleRunFailure(context, ex, exceptionReporters, listeners);

throw new IllegalStateException(ex);

}

try {

listeners.running(context); 调用所有 SpringApplicationRunListener 的 running 方法

} catch (Throwable ex) {

handleRunFailure(context, ex, exceptionReporters, null); 处理运行失败，调用所有 SpringApplicationRunListener 的 failed 方法

throw new IllegalStateException(ex);

}

return context; 返回 IOC 容器

}

static WebApplicationType deduceFromClasspath() 推测是否是 web 环境，通过寻找一些 web 环境的类

都存在就是 REACTIVE： DispatcherHandler，DispatcherServlet，ServletContainer

都存在就是 SERVLET： Servlet，ConfigurableWebApplicationContext

任何一个不存在就是 NONE： Servlet，ConfigurableWebApplicationContext

private Class<?> deduceMainApplicationClass() 推测 main 函数所在类（新建了一个运行异常对象，通过这个对象获取当前的调用函数堆栈数组 StackTrace，之后遍历这个堆栈数组元素的成员方法名，找到方法名为 main 的类，返回这个类）

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