java之异常统一处理

spring-mvc.xml

 <!-- aop -->
   <aop:aspectj-autoproxy/>
   <beans:bean id="controllerAop" class="com.financial.server.aop.ControllerAOP"/>
   <aop:config><!-- 环绕通知 统一捕捉controller方法抛出的异常并进行处理  -->
       <aop:aspect id="myAop" ref="controllerAop">
           <aop:pointcut expression="@annotation (org.springframework.web.bind.annotation.RequestMapping)" id="target"/>
           <aop:around method="handlerControllerMethod" pointcut-ref="target"/>
       </aop:aspect>
   </aop:config>  

controller层拦截处理异常

 package com.financial.server.aop;

 import java.lang.reflect.Method;
 import java.util.Map;

 import org.apache.log4j.Logger;
 import org.aspectj.lang.ProceedingJoinPoint;
 import org.aspectj.lang.Signature;
 import org.aspectj.lang.reflect.MethodSignature;
 import org.springframework.web.servlet.ModelAndView;

 import com.financial.server.util.ResultBean;

 public class ControllerAOP {

     private static final Logger logger = Logger.getLogger(ControllerAOP.class);

     public Object handlerControllerMethod(ProceedingJoinPoint pjp) {
         long startTime = System.currentTimeMillis();
         Object result;
         Signature s = pjp.getSignature();
         MethodSignature ms = (MethodSignature) s;
         Method m = ms.getMethod();
         try {
             result = pjp.proceed();
             logger.info

             (pjp.getSignature() + "接口用时:" + (System.currentTimeMillis() - startTime) + "毫秒");
         } catch (Throwable e) {
             result = handlerException(pjp, e, m.getReturnType().getSimpleName());
         }
         return result;
     }

     private Object handlerException(ProceedingJoinPoint pjp, Throwable e, String returnName) {
         e.printStackTrace();
         if ("ModelAndView".equals(returnName)) {
             ModelAndView mv = new ModelAndView("error");
             return mv;
         } else if ("ResultBean".equals(returnName)) {
             ResultBean result = new ResultBean();
             logger.error(pjp.getSignature() + " error ", e);
             result.setMsg("服务器异常!请稍后重试!");
             result.setCode(result.FAILTRUE);
             // 异常这里可以做其他操作，如通知邮件，单独写到某个文件等等。
             logger.info(e, e);
             logger.error(e.getMessage(), e);
             return result;
         } else if ("String".equals(returnName)) {
             return "error1";
         }  else {
             return "error";
         }

     }
 }

测试方法

 @RequestMapping("/aa")
     public ModelAndView aa() throws Exception{
         throw new Exception("aa");
     }

     @RequestMapping("/bb")
     public String bb() throws Exception{
         throw new Exception("bb");
     }

     @RequestMapping("/cc")
     @ResponseBody
     public ResultBean cc() throws Exception{
         throw new Exception("aa");
     }