java 在 Spring-mvc 拦截器中，如何访问处理程序控制器方法？
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In a Spring-mvc interceptor, how can I access to the handler controller method?
提问by Troncador
In a Spring-mvc interceptor I want to access to the handler controller method
在 Spring-mvc 拦截器中，我想访问处理程序控制器方法
public class CustomInterceptor implements HandlerInterceptor {
public boolean preHandle(
HttpServletRequest request,HttpServletResponse response,
Object handler) {
log.info(handler.getClass().getName()); //access to the controller class
//I want to have the controller method
...
return true;
}
...
}
I have found :
我找到 ：
how-to-get-controller-method-name-in-spring-interceptor-prehandle-method
But it only work around. I want the method name to access to the annotation.
但它只能解决。我希望方法名称可以访问注释。
回答by Sotirios Delimanolis
You can cast the Object handlerto HandlerMethod.
你可以投射Object handler到HandlerMethod.
HandlerMethod method = (HandlerMethod) handler;
Note however that the handlerargument passed to preHandleis not always a HandlerMethod(careful with ClassCastException). HandlerMethodthen has methods you can use to get annotations, etc.
但是请注意，handler传递给的参数preHandle并不总是 a HandlerMethod（小心ClassCastException）。HandlerMethod然后有可用于获取注释等的方法。
回答by dr.house
HandlerInterceptors will only provide you access to the HandlerMethod IF you have registered your interceptors like so :
如果您像这样注册了拦截器，HandlerInterceptors 只会为您提供对 HandlerMethod 的访问：
@EnableWebMvc
@Configuration
public class InterceptorRegistry extends WebMvcConfigurerAdapter {
@Override
public void addInterceptors(org.springframework.web.servlet.config.annotation.InterceptorRegistry registry) {
registry.addInterceptor(new InternalAccessInterceptor());
registry.addInterceptor(new AuthorizationInterceptor());
}
}
In all other cases, the handler object will point to the controller. Most documentation on the web seemed to have missed this subtle point.
在所有其他情况下，处理程序对象将指向控制器。网络上的大多数文档似乎都忽略了这个微妙的点。
