ExceptionHandler 不适用于 Throwable [英] ExceptionHandler doesn't work with Throwable

问题描述

我们是一个基于 Spring MVC 的 REST 应用程序.我正在尝试使用 ExceptionHandler 注释来处理所有错误和异常.

我有

 @ExceptionHandler(Throwable.class)公共@ResponseBody 字符串 handleErrors() {返回错误"；}

这在抛出异常时有效，并且对任何错误无效.

我使用的是 Spring 4.0.有什么解决办法吗?

解决方案

与 ExceptionHandler#value() 属性所指示的相反

Class[] value() 默认 {};

和 @ExceptionHandler 仅用于处理 Exception 及其子类型.

Spring 使用 ExceptionHandlerExceptionResolver 来解析带注释的处理程序，使用以下方法

doResolveHandlerMethodException(HttpServletRequest request,HttpServletResponse 响应、HandlerMethod handlerMethod、Exception 异常)

正如你所见，它只接受一个 Exception.

您无法使用此配置使用 @ExceptionHandler 处理 Throwable 或 Error 类型.

我会告诉你提供你自己的 HandlerExceptionResolver 实现来处理 Throwable 实例，但你需要提供你自己的 DispatcherServlet(以及大部分 MVC 堆栈)您自己，因为 DispatcherServlet 不会在任何可以产生重大影响的地方 catch Throwable 实例.><小时>

更新:

自 4.3 起，Spring MVC 将抛出的 Throwable 值包装在 NestedServletException 实例中，并将其暴露给 ExceptionHandlerExceptionResolver.

Ours is a Spring MVC based REST application. I am trying to use ExceptionHandler annotation to handle all errors and exceptions.

I have

    @ExceptionHandler(Throwable.class)
    public @ResponseBody String handleErrors() {
        return "error";
    }

This works whenever there is an exception thrown and it doesn't work for any errors.

I am using Spring 4.0. Is there any work-around?

解决方案

Contrary to what the ExceptionHandler#value() attribute indicates

Class<? extends Throwable>[] value() default {};

and @ExceptionHandler is only meant to handle Exception and its sub types.

Spring uses ExceptionHandlerExceptionResolver to resolve your annotated handlers, using the following method

doResolveHandlerMethodException(HttpServletRequest request,
        HttpServletResponse response, HandlerMethod handlerMethod, Exception exception) 

which as you can see only accepts an Exception.

You cannot handle Throwable or Error types with @ExceptionHandler with this configuration.

I would tell you to provide your own HandlerExceptionResolver implementation which does handle Throwable instances, but you'd need to provide your own DispatcherServlet (and most of the MVC stack) yourself since DispatcherServlet does not catch Throwable instances at any place where you could make any significant difference.

---

Update:

Since 4.3, Spring MVC wraps a thrown Throwable value in a NestedServletException instance and exposes that to the ExceptionHandlerExceptionResolver.

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