Spring AOP建立Throwdvice實例

         1、異常發生的時候，通知某個服務對象作處理

         2、實現throwsAdvice接口

 

接口實現：

 

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);
    	//測試拋出異常
    	throw new Exception("故意形成異常！");
    }
}

 

　SayThrowAdvice文件：

public class SayThrowAdvice implements ThrowsAdvice {

	public void afterThrowing(Method method,Object[] objs,Object target,Throwable ta)
	{
		System.out.println("我捕獲的異常是-> "+ta+" =====， 在方法 "+method+"拋出了異常");
	}
}

　　

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>
    <!-- 創建目標對象實例 -->
	<bean id="bean_hello" class="com.pb.Hello" />
	<!-- 建立執行前advice實例 -->
	<bean id="sba" class="com.pb.SayBeforeAdvice" />
	<!-- 建立執行後advice實例 -->
	<bean id="sfa" class="com.pb.SayAfterAdvice" />
	<!-- 建立Around advice實例 -->
	<bean id="ssd" class="com.pb.SayAroundAdvice" />
	<!-- 建立Throw advice實例 -->
	<bean id="sta" class="com.pb.SayThrowAdvice" />
	<!-- 創建代理對象 -->
	<bean id="helloProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
	    <!-- 設置代理的接口 -->
	    <property name="proxyInterfaces">
			<value>com.pb.IHello</value>
		</property>
		<!-- 設置目標對象實例 -->
		<property name="target">
			<ref bean="bean_hello"/>
		</property>
		<!-- 設置Advice實例 -->
		<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("訪客");
		} catch (Exception e) {
			// TODO: handle exception
		}
	    
	}

}

　執行效果：