Spring @compenent注解详解

package com.test; import org.springframework.context.support.AbstractApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.test.service.UserService; public class TestMain { public static void main(String[] args) { /** * ApplicationContext代表spring容器，而ClassPathXmlApplicationContext是它的一个实现，它从类路径下读取相应的 * xml 元数据配置，并初始化容器。其中allbean.xml是相应的元数据配置 */ AbstractApplicationContext context = new ClassPathXmlApplicationContext("allbean.xml"); context.registerShutdownHook(); //从容器中获取名称 为 user 的 userService 对象，这个名称在配置文件之后配置。 UserService userService = context.getBean("user", UserService.class); UserService userService1 = context.getBean("user1", UserService.class); UserService userService2 = context.getBean("user2", UserService.class); UserService userService3 = context.getBean("user3", UserService.class); UserService userService4 = context.getBean("user4", UserService.class); UserService userService5 = context.getBean("user5", UserService.class); System.out.println(userService.getUser()); System.out.println("---------111---------"); System.out.println(userService1.getUser()); System.out.println("--------222---------"); System.out.println(userService2.getUser()); System.out.println("--------333---------"); System.out.println(userService3.getUser()); System.out.println("--------444---------"); System.out.println(userService4.getUser()); System.out.println("--------555---------"); System.out.println(userService5.getUser()); System.out.println("--------testValue---------"); System.out.println(context.getBean("testValue")); System.out.println("--------getService---------"); UserService getService = context.getBean("getService", UserService.class); System.out.println(getService.getUser()); System.out.println(getService.getUser()); //可以和传统方式相比较： // UserService user = new UserServiceIml(); // UserDao dao = new UserDaoImp(); // ((UserServiceIml)user).setUserDao(dao); // // System.out.println(user.getUser()); } }