Spring Boot 拦截所有异常处理程序

问题描述

我正在尝试执行一些适用于代码中所有 @ExceptionHandler 的通用逻辑.我知道我可以编写一个 HandlerInterceptor 来拦截快乐路径.但我想挂钩异常处理生命周期，以便在呈现错误响应之前执行一些常见逻辑，例如日志记录.

I am trying to perform some common logic that applies to all my @ExceptionHandlers in code. I know I can write a HandlerInterceptor to intercept happy paths. But I would like to hook into the exception handling lifecycle so that I can execute some common logic such as logging, before the error response is rendered.

无论如何要在 Spring Boot/Spring MVC 中执行此操作吗?如果可能，我想避免为此目的编写 servlet 过滤器.

Is there anyway to do this in Spring Boot / Spring MVC? I would like to avoid having to write a servlet filter for this purpose if possible.

推荐答案

我有一个解决方案.这是关于使用 HandlerInterceptor.afterCompletion 方法.但是，在 此方法的文档 指出:

I have a solution. It's about using HandlerInterceptor.afterCompletion method. However, there is a line in the documentation of this method that states that:

注意:只有当这个拦截器的preHandle方法成功完成并返回true时才会被调用！

所以诀窍是同时实现 preHandle 并使其返回 true.

So the trick is to also implement the preHandle and make it return true.

现在我的拦截器看起来像这样:

Now my interceptor looks like this:

@Component
public class MyInterceptor extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // perform common logic here
    }
}

但是要注意的一件事是，如果您有一个拦截器链和一个拦截器，然后在这个拦截器抛出异常之前，这个拦截器将没有机会执行.因此，如果我们重新排序拦截器链，使 MyInterceptor 位于顶部，它将拦截所有请求.

One thing to be aware of though is that if you have a chain of interceptors and an interceptor before this one throws an exception, this interceptor won't get a chance to execute. So if we reorder the interceptor chain so that MyInterceptor is right at the top, it will intercept all requests.

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