package com.aop;import java.text.SimpleDateFormat;import java.util.Date;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.springframework.stereotype.Component;import com.core.message.ReturnMessage;@Aspect@Componentpublic class ExceptionAop {	private void printTime() {		Date time = new Date();		SimpleDateFormat sdFormat = new SimpleDateFormat(				"yyyyMMdd hh:mm:ss:SSS");		String myTime = sdFormat.format(time);		System.out.println("-----------" + myTime);	}	@Around(value = "execution(* com.action..*.*(..))")	public Object doExceptionAop(ProceedingJoinPoint jp) {		System.out.println("----------安全处理之前-------------");		Object obj = null;		try {			this.printTime();			obj = jp.proceed();			System.out.println(obj.toString());			this.printTime();		} catch (Throwable e) {			e.printStackTrace();			return ReturnMessage.returnError();		}		System.out.println("----------安全处理之后-------------");		return obj;	}}

使用spring aop 技术，拦截action层所有方法，方法产生异常，截获异常，返回统一的错误信息。