Spring - 在拦截器/过滤器中获取给定请求的方法 [英] Spring - get Method for a given request in Interceptor/Filter

问题描述

我的 @Controller 类中的各种 @RequestMapping 方法都有我想在运行时分析的自定义注释.

Various @RequestMapping methods inside my @Controller classes have custom annotations that I want to analyze at runtime.

例如:

@Controller
@RequestMapping("/bla")
@RequireCommunityLevel("...")
@AnotherCustomAnnotation(value = "...")
public class FakeController {

    // ...
    @RequireScore(level = Score.Platinum, score = 8500)
    @RequestMapping("/blabla")
    @AnotherCustomAnnotation(value = "...")
    public DTOResponse<MySpecialModel> getMySpecialModels() {
        // ...
    }

}

当我在自定义 Interceptor 和 Filter 类中收到请求时，我想分析该请求将调用哪个 Method.

When I receive a request in my custom Interceptor and Filter classes, I want to analyze which Method the request is going to call.

我过去曾使用基于 Javax Servlet 和 Jetty 的自定义框架，并且经常实现某种方法注册询问.

I have worked in the past with custom frameworks based on Javax Servlet and Jetty and often implemented some kind of method-registry one could interrogate.

例如:

public class CustomFilter extends Filter {

    @Inject
    private MyMethodRegistry registry;

    @Override
    public void doFilter(
      ServletRequest request, 
      ServletResponse response,
      FilterChain chain) throws IOException, ServletException {

        // get the request path
        final String path = getPath(request); 

        final Method m = this.registry.getMethodForPath(path);

        // that's what I mean to do
        if (m.getAnnotation(RequireScore.class) != null) { ... }

        if (m.getDeclaringClass().getAnnotation(AnotherCustomAnnotation.class != null) { ... }

        chain.doFilter(request, response);
    }
}

我正在 Spring 中寻找类似的方法，可能是一个内置实用程序，用于在运行时分析我的 @RequestMapping<上的 Annotation/代码> 方法.所有这些都应该发生在我的拦截器/过滤器中.

I'm looking for a similar way in Spring, possibly a built-in utility to analyze at runtime the Annotation's on my @RequestMapping methods. All of this should happen within my Interceptor/Filter.

推荐答案

正如@M.Deinum 在评论中所建议的，您可以在 Interceptor 中获取 Handler 作为参数.

As @M.Deinum advised in the comments you can get the Handler as parameter in your Interceptor.

我还发现了 本教程准确地解释了我所需要的.

I have also found this tutorial that explains exactly what I needed.

在HandlerInterceptor::preHandle

final HandlerMethod handlerMethod = (HandlerMethod) handler; // the last parameter
final Method method = handlerMethod.getMethod();

// check for annotations

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