8Spring AOP盗梦空间之三 ——AfterThrowing

书接上回

话说LEO在日本人打盹的时候盗取密码。电影中，梦境里日本人摸了地毯发现材质不对，知道被盗梦了，就开始与LEO团队扭打起来。发现了异常LEO需要尽快逃跑。这样需要LEO可以对日本人haveNap方法抛出异常进行监听并处理。

Spring提供了这种方式，@AfterThrowing用于监听宿主的异常，并处理异常。


1、Person代码修改如下

package com.spring.service;

import org.springframework.stereotype.Component;


@Component
public class Person {

	public int haveNightmare() throws Exception 
	{
		System.out.println(this.getClass().getName());
		System.out.println("做恶梦");
		int password = 5/0;//抛出异常
		return password;
	}
}

2、LeoIncept代码修改如下

package com.spring.aop;

import java.lang.reflect.Method;

import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.aop.AfterReturningAdvice;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class LeoIncept{
	
	@AfterThrowing(throwing="arg0",pointcut ="execution(public int com.spring.service.Person.haveNightmare())")
	public void stealPassword(Exception arg0) throws Throwable {
		System.out.println(this.getClass().getName());
		System.out.println("异常原因："+arg0.getMessage());//输出异常原因
		System.out.println("出现异常了，快跑");
	}
}

3、测试代码

package com.spring.service.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.spring.service.Person;

public class PersonTest {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		ApplicationContext ctx = new ClassPathXmlApplicationContext("springbeans.xml");
		Person person = (Person) ctx.getBean("person");
		
        try {
			person.haveNightmare();
		} catch (Exception e) {
			// TODO Auto-generated catch block
	
		}	
	}

}

输出结果

com.spring.service.Person
做恶梦
com.spring.aop.LeoIncept
异常原因：/ by zero
出现异常了，快跑