Spring AOP 简单demo

以前做的Spring AOP的小例子，今天拿来看了一下，可以作为初学者学习的一个简单demo。

做的很简单，大致是用到了AOP的注解方式。个人感觉Spring AOP真的很不错。可以做日志处理等。

先贴代码:

 

1. 接口 IUser.java

package com.jushi.aop;

public interface IUser {

	public String findUser(String username);
	public void addUser(String username);
	public void findAll();
}

 

2. 接口实现 IUserImpl.java

package com.jushi.aop;

import java.util.HashMap;
import java.util.Map;

public class IUserImpl implements IUser {

	public static Map map = null;
	public static void init(){
		String[] list = {"Lucy", "Tom", "小明", "Smith", "Hello"};
		Map tmp = new HashMap();
		for(int i=0; i<list.length; i++){
			tmp.put(list[i], list[i]+"00");
		}
		map = tmp;
	}
	public void addUser(String username) {
		init();
		map.put(username, username+"11");
		System.out.println("--------------【addUser】: "+username+" --------------");
		System.out.println("【The new List:"+map+"】");
	}

	public void findAll() {
		init();
		System.out.println("---------------【findAll】: "+map+" ------------------");
	}

	public String findUser(String username) {
		init();
		String password = "没查到该用户";
		if(map.containsKey(username)){
			password = map.get(username).toString();
		}
		System.out.println("-----------------【findUser】-----------------");
		System.out.println("-----------------Username:"+username+"-----------------");
		System.out.println("-----------------【Result】:"+password+"------------------");
		return password;
		
	}

}

 3. 拦截类 CheckUser.java

package com.jushi.aop;

import java.util.Date;

import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class CheckUser {

	@Pointcut("execution(* com.jushi.aop.*.find*(..))")
	public void checkUser(){
		System.out.println("**************The System is Searching Information For You****************");
	}
	
	@Pointcut("execution(* com.jushi.aop.*.add*(..))")
	public void checkAdd(){
		System.out.println("**************<< Add User >> Checking.....***************");
	}
	
	@Before("checkUser()")
	public void beforeCheck(){
		System.out.println(">>>>>>>> 准备搜查用户..........");
	}
	
	@After("checkUser()")
	public void afterCheck(){
		System.out.println(">>>>>>>>　搜查用户完毕..........");
	}

	@Before("checkAdd()")
	public void beforeAdd(){
		System.out.println(">>>>>>>>　增加用户--检查ing..........");
	}
	
	@After("checkAdd()")
	public void afterAdd(){
		System.out.println(">>>>>>>>　增加用户--检查完毕！未发现异常!..........");
	}
}

 4. 实体pojo User.java

package com.jushi.entity;

public class User {

	private String username;
	private String password;
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
}

 5. applicationContext.xml

<?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:aop="http://www.springframework.org/schema/aop"
	   xmlns:tx="http://www.springframework.org/schema/tx"
	   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
						   http://www.springframework.org/schema/tx 
						   http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
	
	<aop:aspectj-autoproxy/>
	<bean id="user" class="com.jushi.aop.IUserImpl"/>
	<bean id="check" class="com.jushi.aop.CheckUser"/>
	
	<!--  <aop:config>
		<aop:pointcut id="find" expression="execution(* com.jushi.aop.*.find*(..))" />
		<aop:pointcut id="add" 	expression="execution(* com.jushi.aop.*.add*(..))" />
		
		<aop:aspect id="checkUser" ref="check">
			<aop:before method="beforeCheck" pointcut-ref="find"/>
			<aop:after method="afterCheck" pointcut-ref="find"/>
		</aop:aspect>
		
		<aop:aspect id="checkAdd" ref="check">
			<aop:before method="beforeAdd" pointcut-ref="add"/>
			<aop:after method="afterAdd" pointcut-ref="add"/>
		</aop:aspect>
	
	</aop:config>-->
</beans>

 

 

好了，一个简单AOP demo就配置好了，测试一下

结果如下：

 

>>>>>>>>　增加用户--检查ing..........
--------------【addUser】: haha --------------
【The new List:{Lucy=Lucy00, Tom=Tom00, haha=haha11, Smith=Smith00, Hello=Hello00, 
小明=小明00}】
>>>>>>>>　增加用户--检查完毕！未发现异常!..........

 

例子很小，仅供参考...

评论

2 楼 Ethan楚翔 2017-01-12  

jdk1.7运行报错,
大家用1.6以下版本

1 楼 liaozhaijk 2013-09-04  

工程 用的包 加上呗  要不还的自己弄 
版本不对  还老有问题！！！