Spring AOP示例代码




public interface CustomerDao {
	
	public void save();
	
	public void update();

}

  

public class CustomerDaoImpl implements CustomerDao {

	public void save() {
		// 模拟异常
		// int a = 10/0;	
		System.out.println("保存客户...");
	}
	
	public void update() {
		System.out.println("修改客户...");
	}

}

  

import org.aspectj.lang.ProceedingJoinPoint;

/**
 * 切面类:切入点 + 通知
 * @author Administrator
 */
public class MyAspectXml {
	
	/**
	 * 通知(具体的增强)
	 */
	public void log(){
		System.out.println("记录日志...");
	}
	
	
	/**
	 * 最终通知:方法执行成功或者出现异常,都会执行
	 */
	public void before(){
		System.out.println("before通知...");
	}
	/**
	 * 最终通知:方法执行成功或者出现异常,都会执行
	 */
	public void after(){
		System.out.println("after通知...");
	}
	
	/**
	 * 方法执行之后,执行后置通知。程序出现了异常,后置通知不会执行的。
	 */
	public void afterReturn(){
		System.out.println("后置通知...");
	}
	
	/**
	 * 环绕通知:方法执行之前和方法执行之后进行通知,默认的情况下,目标对象的方法不能执行的。需要手动让目标对象的方法执行
	 */
	public void around(ProceedingJoinPoint joinPoint){
		System.out.println("环绕通知1...");
		try {
			// 手动让目标对象的方法去执行
			joinPoint.proceed();
		} catch (Throwable e) {
			e.printStackTrace();
		}
		System.out.println("环绕通知2...");
	}

}

  

<?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" xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!-- bean definitions here -->
	
	<!-- 配置客户的dao -->
	<bean id="customerDao" class="com.itheima.demo3.CustomerDaoImpl"/>
	
	<!-- 编写切面类配置好 -->
	<bean id="myAspectXml" class="com.itheima.demo3.MyAspectXml"/>
	
	<!-- 配置AOP -->
	<aop:config>
		<aop:aspect ref="myAspectXml">
			<!-- <aop:before method="log" pointcut="execution(public void com.itheima.demo3.CustomerDaoImpl.save())"/> -->
			
			<!-- 配置最终通知 
			<aop:after method="after" pointcut="execution(public void com.itheima.demo3.CustomerDaoImpl.save())"/>
			-->
			<aop:before method="before" pointcut="execution(public void com.itheima.demo3.CustomerDaoImpl.save())"/>
			<aop:after method="after" pointcut="execution(public void com.itheima.demo3.CustomerDaoImpl.save())"/>
			<!-- <aop:after-returning method="afterReturn" pointcut="execution(public void com.itheima.demo3.CustomerDaoImpl.save())"/> -->
			
			<!-- 环绕通知
			<aop:around method="around" pointcut="execution(public void com.itheima.demo3.CustomerDaoImpl.save())"/> -->
		</aop:aspect>
	</aop:config>
	
</beans>

  

原文地址:https://www.cnblogs.com/leodaxin/p/8379862.html