攔截請求有很多種方法，最簡單的用攔截器，但是攔截器並不能獲取返回的資料（比如@ResponseBody），上網找了一段時間，可以利用spring的AOP特性攔截並獲取，還能修改返回的資料。

• 準備

<dependency>
  <groupId>org.aspectj</groupId>
  <artifactId>aspectjrt</artifactId>
  <version>1.8.9</version>
</dependency>
<dependency>
  <groupId
 
>org.aspectj</groupId>
  <artifactId>aspectjweaver</artifactId>
  <version>1.8.9</version>
</dependency>

• 攔截程式碼

package com.jujin.riskmanager.interceptor;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

import
 
 com.fasterxml.jackson.databind.ObjectMapper;
import com.jujin.common.JsonList;


public class ResultInterceptor implements MethodInterceptor {

    private final static ObjectMapper jsonMapper = new ObjectMapper();  

    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {

         Object result = invocation.proceed();  
         // 隨意處理結果吧
 

         System.out.println("After: result: "+ jsonMapper.writeValueAsString(result));  

        return result;
    }

}

• spring配置

<!-- AOP -->
<bean id="controllerMethodInterceptor"          class="com.jujin.riskmanager.interceptor.ResultInterceptor"/>  

<aop:config proxy-target-class="true">  
   <aop:pointcut id="controllerMethodPointcut" expression="execution(* com.jujin.riskmanager.controller..*(..)) and @annotation(org.springframework.web.bind.annotation.RequestMapping)"/>  
   <aop:advisor advice-ref="controllerMethodInterceptor" pointcut-ref="controllerMethodPointcut" />  
</aop:config>