Spring_aop_xml-优快云博客

本文链接：https://blog.youkuaiyun.com/u014201191/article/details/43953489

本文介绍了一个使用Spring框架实现的AOP（面向切面编程）案例，包括DAO接口定义、日志拦截器的具体实现、测试类及Spring配置文件的详细设置。

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1) 项目清单

2) 源码

① 接口

package com.spt.interfaces;

public interface DAO {

	boolean save(Object entity);
	boolean delete(Object id);
	boolean update(Object entity);
	
}

② 切面类

package com.LogInter;

import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;

public class LogInterceptor {
public void before(){
	System.out.println("method start");
}

public void after(){
	System.out.println("method stop");
}
}

③ 测试类

package com.jdbctemplate.test;

import java.math.BigDecimal;
import java.util.List;

import org.aspectj.lang.annotation.Aspect;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Component;


public class Test2 {

	public static void main(String[] args) {
		ApplicationContext app = new ClassPathXmlApplicationContext("aa.xml");
		
		/*
		 *Anncation注解方式,如果被代理target(Test2)需要继承接口le ,那么接口就是代理类,
		 *   Test t = (Test) app.getBean("test"); 这里生成的必须是接口类型,而spring支持无接口模式代理,
		 *   代理类与被代理类都必须通过spring管理,@Aspect声明这是代理类,@Component("posxy"),spring初始化,
		 *   
		 */
		Test2 t = (Test2) app.getBean("test");
		/*
		 * t可以正常代理,而tt不行,必须通过spring产生对象;
		 */
		Test2 tt=new Test2();
		t.getAll();
	}
	public  void getAll() {
	System.out.println("started");
	}
}

④ 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:context="http://www.springframework.org/schema/context"
       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/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop
           http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">
	<context:annotation-config />
	<context:component-scan base-package="com"/>
	
	
	<bean id="test" class="com.jdbctemplate.test.Test2"></bean>
	<bean id="LogInterceptor" class="com.LogInter.LogInterceptor"></bean>
	
	<aop:config>
	<aop:pointcut expression="execution(public * com..*.*(..))" id="pointcut"/>
	<aop:aspect id="aspect" ref="LogInterceptor">
	<aop:before method="before" pointcut-ref="pointcut" />
	<aop:after method="after" pointcut-ref="pointcut"/>
	</aop:aspect>
	</aop:config>
	
</beans>