1、异常发生的时候，通知某个服务对象做处理
2、实现throwsAdvice接口
接口实现：
public interface IHello {
public void sayHello(String str) throws Exception;
}
public class Hello implements IHello {
@Override
public void sayHello(String str) throws Exception {
System.out.println("你好"+str);
//测试抛出异常
throw new Exception("故意造成异常！");
}
}
SayThrowAdvice文件：
public class SayThrowAdvice implements ThrowsAdvice {
public void afterThrowing(Method method,Object[] objs,Object target,Throwable ta)
{
System.out.println("我捕获的异常是-> "+ta+" =====， 在方法 "+method+"抛出了异常");
}
}
applicationContext.xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN"
"http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<!-- 建立目标对象实例 -->
<bean id="bean_hello" class="com.pb.Hello" />
<!-- 创建执行前advice实例 -->
<bean id="sba" class="com.pb.SayBeforeAdvice" />
<!-- 创建执行后advice实例 -->
<bean id="sfa" class="com.pb.SayAfterAdvice" />
<!-- 创建Around advice实例 -->
<bean id="ssd" class="com.pb.SayAroundAdvice" />
<!-- 创建Throw advice实例 -->
<bean id="sta" class="com.pb.SayThrowAdvice" />
<!-- 建立代理对象 -->
<bean id="helloProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
<!-- 设置代理的接口 -->
<property name="proxyInterfaces">
<value>com.pb.IHello</value>
</property>
<!-- 设置目标对象实例 -->
<property name="target">
<ref bean="bean_hello"/>
</property>
<!-- 设置Advice实例 -->
<property name="interceptorNames">
<list>
<!--
<value>sba</value>
<value>sfa</value>
-->
<value>ssd</value>
<value>sta</value>
</list>
</property>
</bean>
</beans>
主方法文件：
public class MainTest {
public static void main(String[] args) {
// TODO Auto-generated method stub
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
IHello hello=(IHello)context.getBean("helloProxy");
try {
hello.sayHello("访客");
} catch (Exception e) {
// TODO: handle exception
}
}
}
执行效果：
