AOP annotations in automatic assembly notice

May 8 posted in Java (RSS), comments.

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AOP annotations in automatic assembly notice

First, create an annotated class:

Note: aop introduction

package cn.csdn.util;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;

@Aspect
public class ServiceImpl implements Service {

        /**
         * @Before("execution(* work())") The first parameter in the method "*" Is a return value, the second parameter "work()" Is the method name 
         * */
        @Before("execution(* goWork())")
        public void eat(JoinPoint jp) {
                // TODO Auto-generated method stub
                System.out.println("I'm eating!!!");
                /*
                 *  Output is the result of : I'm eating!!!  I'm working !
                 */
        }

        /**
         * After(execution(*
         * cn.csdn.service.Emp*.*(..))) First parameter method (*) Is a return value, the second parameter is located in cn.csdn.service
         *  All package prefix is under Emp class methods ,((..)) Represents the method argument can be of variable parameters 
         * */
        @After("execution(* cn.csdn.service.Emp*.*(..))")
        public void goCompany() {
                // TODO Auto-generated method stub
                System.out.println("I want to go home");
        }
/**
 *  Summary of the return value is void and * Two types of representation of the method name directly write method name . Write which method of that class or the class and method name fuzzy match */
        @AfterThrowing(pointcut = "execution(* *..EmpService*.*(..))", throwing = "ex")
        public void leave(Exception ex) {
                // TODO Auto-generated method stub
                System.out.println("I want leav");
        }

        @Before("execution(* cn.csdn.service.EmpServiceImpl.*(..))")
        public void goHome() {
                // TODO Auto-generated method stub
                System.out.println("I want go Home");

        }

        @Around("execution(* *..Emp*.goWork(..))")
        public void signIn() {
                // TODO Auto-generated method stub
                System.out.println("I around before");
                System.out.println("I around after");

        }

}

The part of the xml code:

<beans xmlns="http://www.springframework.org/schema/beans"     
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        xmlns:p="http://www.springframework.org/schema/p"
        xmlns:aop="http://www.springframework.org/schema/aop"
        xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
         >

        <bean/>
        <bean></bean>     
        <aop:aspectj-autoproxy/>

</beans>

source code is as follows: