Spring AOP创建Throwdvice实例

         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：