SpringMVC(十一）异常处理器和注解配置SpringMVC

package com.rgf.config; import com.rgf.interceptor.FirstInterceptor; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.web.context.ContextLoader; import org.springframework.web.context.WebApplicationContext; import org.springframework.web.multipart.commons.CommonsMultipartResolver; import org.springframework.web.servlet.HandlerExceptionResolver; import org.springframework.web.servlet.ViewResolver; import org.springframework.web.servlet.config.annotation.*; import org.springframework.web.servlet.handler.SimpleMappingExceptionResolver; import org.thymeleaf.spring5.SpringTemplateEngine; import org.thymeleaf.spring5.view.ThymeleafViewResolver; import org.thymeleaf.templatemode.TemplateMode; import org.thymeleaf.templateresolver.ITemplateResolver; import org.thymeleaf.templateresolver.ServletContextTemplateResolver; import java.util.List; import java.util.Properties; /** * 代替SpringMVC的配置文件 * 扫描组件、视图解析器、默认的servlet、mvc的注解驱动 * 视图控制器、文件上传解析器、拦截器、异常解析器 */ @Configuration //扫描组件 @ComponentScan("com.rgf.controller") //开启mvc的注解驱动 @EnableWebMvc public class WebConfig implements WebMvcConfigurer { @Override //默认的servlet处理静态资源 public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) { configurer.enable(); } @Override //配置视图解析器 public void addViewControllers(ViewControllerRegistry registry) { registry.addViewController("/").setViewName("index"); } //@Bean注解可以将标识的方法的返回值作为bean进行管理，bean的id为方法的方法名 @Bean public CommonsMultipartResolver multipartResolver(){ return new CommonsMultipartResolver(); } @Override public void addInterceptors(InterceptorRegistry registry) { FirstInterceptor firstInterceptor = new FirstInterceptor(); registry.addInterceptor(firstInterceptor).addPathPatterns("/**"); } @Override //配置异常解析器 public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> resolvers) { SimpleMappingExceptionResolver exceptionResolver = new SimpleMappingExceptionResolver(); Properties prop = new Properties(); prop.setProperty("java.lang.ArithmeticException","error"); exceptionResolver.setExceptionMappings(prop); exceptionResolver.setExceptionAttribute("ex"); resolvers.add(exceptionResolver); } //配置生成模板解析器 @Bean public ITemplateResolver templateResolver(){ WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext(); ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver(webApplicationContext.getServletContext()); //ServletContextTemplateResolver需要一个ServletContext作为构造参数，可通过webApplicationContext的方法获得 templateResolver.setPrefix("/WEB-INF/templates/"); templateResolver.setSuffix(".html"); templateResolver.setCharacterEncoding("UTF-8"); templateResolver.setTemplateMode(TemplateMode.HTML); return templateResolver; } //生成模板引擎并为模板引擎注入模板解析器 @Bean public SpringTemplateEngine templateEngine(ITemplateResolver templateResolver){ SpringTemplateEngine templateEngine = new SpringTemplateEngine(); templateEngine.setTemplateResolver(templateResolver); return templateEngine; } //生成视图解析器并为解析器注入模板引擎 @Bean public ViewResolver viewResolver(SpringTemplateEngine templateEngine){ ThymeleafViewResolver viewResolver = new ThymeleafViewResolver(); viewResolver.setCharacterEncoding("UTF-8"); viewResolver.setTemplateEngine(templateEngine); return viewResolver; } }