SpringMVC系列五：SpringMVC的异常处理-HandlerExceptionResolver处理流程

最新推荐文章于 2025-10-27 15:01:33 发布

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最新推荐文章于 2025-10-27 15:01:33 发布 · 1k 阅读

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#java #servlet #spring

本文深入探讨SpringMVC的异常处理流程，包括初始化阶段、默认的HandlerExceptionResolver及其处理流程。详细解析ExceptionHandlerExceptionResolver如何处理@ExceptionHandler注解的方法，ResponseStatusExceptionResolver对ResponseStatus异常的响应，以及DefaultHandlerExceptionResolver对默认异常的处理策略。

SpringMVC的http请求的异常处理-HandlerExceptionResoler处理流程

文章目录

SpringMVC的http请求的异常处理-HandlerExceptionResoler处理流程

初始化

@Bean
public HandlerExceptionResolver handlerExceptionResolver() {
   
   
   List<HandlerExceptionResolver> exceptionResolvers = new ArrayList<>();
   configureHandlerExceptionResolvers(exceptionResolvers);
   // 添加默认的 HandlerExceptionResolver
   if (exceptionResolvers.isEmpty()) {
   
   
      addDefaultHandlerExceptionResolvers(exceptionResolvers);
   }
   extendHandlerExceptionResolvers(exceptionResolvers);
   HandlerExceptionResolverComposite composite = new HandlerExceptionResolverComposite();
   composite.setOrder(0);
   composite.setExceptionResolvers(exceptionResolvers);
   return composite;
}

protected final void addDefaultHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
   
   
   ExceptionHandlerExceptionResolver exceptionHandlerResolver = createExceptionHandlerExceptionResolver();
   exceptionHandlerResolver.setContentNegotiationManager(mvcContentNegotiationManager());
   exceptionHandlerResolver.setMessageConverters(getMessageConverters());
   exceptionHandlerResolver.setCustomArgumentResolvers(getArgumentResolvers());
   exceptionHandlerResolver.setCustomReturnValueHandlers(getReturnValueHandlers());
   if (jackson2Present) {
   
   
      exceptionHandlerResolver.setResponseBodyAdvice(
            Collections.singletonList(new JsonViewResponseBodyAdvice()));
   }
   if (this.applicationContext != null) {
   
   
      exceptionHandlerResolver.setApplicationContext(this.applicationContext);
   }
   exceptionHandlerResolver.afterPropertiesSet();
   exceptionResolvers.add(exceptionHandlerResolver);

   ResponseStatusExceptionResolver responseStatusResolver = new ResponseStatusExceptionResolver();
   responseStatusResolver.setMessageSource(this.applicationContext);
   exceptionResolvers.add(responseStatusResolver);

   exceptionResolvers.add(new DefaultHandlerExceptionResolver());
}

SpringMVC中默认加入的HandlerExceptionResoler

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HandlerExceptionResoler的实现类在SpringMVC中的顺序

ExceptionHandlerExceptionResolver：基于 @ExceptionHandler 配置 HandlerMethod 的 HandlerExceptionResolver 实现类。例如通过 @ControllerAdvice 注解自定义异常处理器，加上@ExceptionHandler注解指定方法所需要处理的异常类型
ResponseStatusExceptionResolver：基于 @ResponseStatus 提供错误响应的 HandlerExceptionResolver 实现类。例如在方法上面添加 @ResponseStatus 注解，指定该方法发生异常时，需要设置的 code 响应码和 reason 错误信息
DefaultHandlerExceptionResolver：默认 HandlerExceptionResolver 实现类，针对各种异常，设置错误响应码。例如 HTTP Method 不支持，则在这个实现类中往响应中设置错误码和错误信息

在这里插入图片描述

异常处理流程

public ModelAndView resolveException(
			HttpServletRequest request, HttpServletResponse response, @Nullable Object handler, Exception ex) {
   
   

		if (this.resolvers != null) {
   
   // 异常处理
			for (HandlerExceptionResolver handlerExceptionResolver : this.resolvers) {
   
   
				ModelAndView mav = handlerExceptionResolver.resolveException(request, response, handler, ex);
				if (mav != null) {
   
   
					return mav;
				}
			}
		}
		return null;
	}

public ModelAndView resolveException(
      HttpServletRequest request, HttpServletResponse response, @Nullable

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