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");
    }