Spring Aop 详解之实例

Spring Aop例子详解


jar要求：

[spring 3.2 所需jar包；]
[Aspect所需jar包：aspectjrt.jar,aspectjweaver.jar]

spring xml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-3.2.xsd  
		   http://www.springframework.org/schema/aop
		   http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
		   http://www.springframework.org/schema/context
		   http://www.springframework.org/schema/context/spring-context-3.2.xsd">
	
	<!-- AOP的注解形式 -->
	<aop:aspectj-autoproxy />
	
	<bean id="logManage" class="com.xhy.aop.LogManage" />
	
<!--	<bean id="logManageXml" class="com.xhy.aop.LogManageXML" />-->
	
	<bean id="people" class="com.xhy.aop.People" />
	
	<!-- AOP的xml配置 -->
<!--	<aop:config>-->
<!--		<aop:aspect ref="logManageXml">-->
<!--			<aop:pointcut expression="execution(* *.work(..))" id="pointcut"/>-->
<!--			<aop:before method="doBefore" pointcut-ref="pointcut"/>-->
<!--			<aop:after method="doAfter" pointcut-ref="pointcut"/>-->
<!--			<aop:around method="doAround" pointcut-ref="pointcut"/>-->
<!--			<aop:after-returning method="doReturn" pointcut-ref="pointcut"/>-->
<!--			<aop:after-throwing method="doThrow" pointcut-ref="pointcut" throwing="e"/>-->
<!--		</aop:aspect>-->
<!--	</aop:config>-->
	
</beans>

注意：注释的那部分是以xml配置方式运行

目标类：

package com.xhy.aop;
public class People{

	public void work(){
		System.out.println("----人需要工作才能生活！----");
		int x = 5/0;
	}
	
}

注解实现切面类：

@Aspect
public class LogManage {
	
	private static final String EDP = "execution(* *.work())";

	@Pointcut(EDP)
	public void pointMethod(){}
	
	@Before(EDP)
	public void doBefore(){
		System.out.println("方法之前做一些事情~~~");
	}
	
	@After(EDP)
	public void doAfter(){
		System.out.println("方法之后做一些事情~~~");
	}
	
	@AfterReturning(EDP)
	public void doReturn(){
		System.out.println("方法返回后做一些事情~~~");
	}
	
	@Around(EDP)
	public Object doAround(ProceedingJoinPoint joinPoint){
		System.out.println("logAround开始:现在时间是:"+new Date()); 
		System.out.println(joinPoint.getClass().getName());
        Object[] args = joinPoint.getArgs();  
        Object obj = null;  
        try {  
            obj = joinPoint.proceed(args);
        } catch (Throwable e) {  
            e.printStackTrace();  
        }  
        System.out.println("logAround结束:现在时间是:"+new Date()); 
        return obj;  
	}
	
	@AfterThrowing(pointcut="execution(* com.xhy.aop.People.work())",throwing="e")
	public void doThrow(Exception e){
		if(e!=null){  
            System.out.println("执行异常:" + e.getMessage());  
            sendMsg();  
        }  
    }  
	
    private void sendMsg(){  
       System.out.println("发送出错报告（邮件、短信）");  
    }  
	
}

XML实现切面类：

public class LogManageXML {
	

	
	public void doBefore(){
		System.out.println("方法之前做一些事情~~~");
	}
	
	public void doAfter(){
		System.out.println("方法之后做一些事情~~~");
	}
	
	public void doReturn(){
		System.out.println("方法返回后做一些事情~~~");
	}
	
	public Object doAround(ProceedingJoinPoint joinPoint){
		System.out.println("logAround开始:现在时间是:"+new Date()); 
        Object[] args = joinPoint.getArgs();  
        Object obj = null;  
        try {  
            obj = joinPoint.proceed(args);
        } catch (Throwable e) {  
            e.printStackTrace();  
        }  
        System.out.println("logAround结束:现在时间是:"+new Date()); 
        return obj;  
	}
	
	public void doThrow(Exception e){
		 if(e!=null){  
	            System.out.println("执行异常:" + e.getMessage());  
	            sendMsg();  
	        }  
    }  
	
    private void sendMsg(){  
        System.out.println("发送出错报告（邮件、短信）");  
    }  
	
}

测试类：

public class AopTest {

	public static void main(String[] args){
		ApplicationContext context = new ClassPathXmlApplicationContext("/springConfig/applicationContext_AOP.xml");
		People people = (People)context.getBean("people");
		people.work();
	}
}

运行AopTest查看控制台输出的结果。
我在以注解方式运行的时候发现一个问题，即执行5/0的时候抛出异常。@AfterThrowing标记的方法不执行，xml配置方式完全正常。我也没有找到是什么问题。
网上说是@AfterThrowing 和@Around顺序问题；还有代码中需要直接抛出异常，我都试过，不行。所以这算是个bug吧！如果有哪位高手知道，可以交流下。

评论

1 楼 lvwenwen 2013-09-12  

上传工程吧，小伙伴们找包找的辛苦