Spring 註解 實現 AOP （切面編程）

Spring 註解 實現 AOP （切面編程）

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實現功能：AOP實現模擬日誌

實體類

package top.vkiss.springaop.domain;
public class User {
	private String name;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
}

DAO 層接口

package top.vkiss.springaop.dao;
public interface UserDao {
	public void addUser();
	public void delUser();
}

DAO 層實現類

package top.vkiss.springaop.dao;
import org.springframework.stereotype.Repository;
@Repository("ud")
public class UserDaoImpl implements UserDao {
	@Override
	public void addUser() {
		// TODO Auto-generated method stub
		int a = 10/0;
		System.out.println("     添加一名用戶 ！");
	}
	@Override
	public void delUser() {
		// TODO Auto-generated method stub
		System.out.println("     刪除一名用戶 ！");
	}
}

service 層接口

package top.vkiss.springaop.service;
public interface UserService {
	public void addUser();
	public void delUser();
}

service 實現類

package top.vkiss.springaop.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import top.vkiss.springaop.dao.UserDao;
@Service("us")
public class UserServiceImpl implements UserService {
	@Autowired
	private UserDao ud;
	public UserDao getUd() {
		return ud;
	}
	public void setUd(UserDao ud) {
		this.ud = ud;
	}
	@Override
	public void addUser() {
		// TODO Auto-generated method stub
		ud.addUser();
	}
	@Override
	public void delUser() {
		// TODO Auto-generated method stub
		ud.delUser();
	}
}

Action 層接口

package top.vkiss.springaop.action;
public interface UserAction {
	public void addUser();
	public void delUser();
}

Action 層實現類

package top.vkiss.springaop.action;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import top.vkiss.springaop.service.UserService;
@Controller("userAction")
public class UserActionImpl implements UserAction {
	@Autowired
	private UserService us;
	public UserService getUs() {
		return us;
	}
	public void setUs(UserService us) {
		this.us = us;
	}
	@Override
	public void addUser() {
		// TODO Auto-generated method stub
		us.addUser();
	}
	@Override
	public void delUser() {
		// TODO Auto-generated method stub
		us.delUser();
	}
}

日誌層

package top.vkiss.springaop.log;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Service;
@Service("daoLog")
@Aspect
public class DaoLog {
	@Pointcut("execution( * top.vkiss.springaop.dao.*Impl.*(..) )")
	public void pointCut_(){}
	@Before("pointCut_()")
	public void method_Before(){
		System.out.println("。日誌操作...");
	}
	@After("pointCut_()")
	public void method_After(){
		System.out.println("。日誌操作後。。。");
	}
	@AfterThrowing(pointcut="pointCut_()",throwing="e")
	public void afterThrows(JoinPoint joinPoint,Exception e){
		System.out.println("dao層的_"+joinPoint.getSignature().getName()+"出現了："+e.toString()+"異常");
	}
	@AfterReturning(returning="result",pointcut="pointCut_()")
	public void method_After_returning(JoinPoint joinPoint,Object result){
		System.out.println("。return之後。。。返回值"+result);
	}
	public Object method_After_around(ProceedingJoinPoint jp){
		Object  resultObject=null;
		try {
			System.out.println("方法執行之前 。。。。");
			 resultObject=  jp.proceed() ;
			System.out.println("返回值執行的。。。。");
		} catch (Throwable e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			System.out.println("出現異常執行的代碼");
		}//執行方法 
		System.out.println("方法執行之後的內容");
	     return resultObject;
	}
}

Test 測試類

package top.vkiss.springaop.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import top.vkiss.springaop.action.CustomerActionImpl;
import top.vkiss.springaop.action.UserActionImpl;
public class TestAOP {
	public static void main(String[] args) {
		ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
		UserActionImpl uac = (UserActionImpl) ac.getBean("userAction");
		//uac.addUser();//異常測試
		uac.delUser();
	}
}

Spring 配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:util="http://www.springframework.org/schema/util"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans.xsd
	http://www.springframework.org/schema/util 
	http://www.springframework.org/schema/util/spring-util.xs
	http://www.springframework.org/schema/aop
	http://www.springframework.org/schema/aop/spring-aop.xsd
	http://www.springframework.org/schema/context 
	http://www.springframework.org/schema/context/spring-context.xsd">
	<!-- 開啓註解掃描 -->
	<context:component-scan base-package="top.vkiss"></context:component-scan>
	<!-- 開啓 AOP 註解 -->
	<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>

項目中用到的jar包

aop 依賴包：

com.springsource.net.sf.cglib-2.2.0.jar
com.springsource.org.aopalliance-1.0.0.jar
com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar

struts 2 日誌包：

commons-logging-1.1.3.jar

spring 核心包：
spring-aop-5.0.0.RELEASE.jar
spring-aspects-5.0.0.RELEASE.jar
spring-beans-5.0.0.RELEASE.jar
spring-context-5.0.0.RELEASE.jar
spring-core-5.0.0.RELEASE.jar
spring-expression-5.0.0.RELEASE.jar

注意：spring版本和jdk版本搭配（否則會出現各種異常）

           spring 3.0+  & JDK 1.7

           spring 4.0+  & JDK 1.8