Spring在使用后置通知与环绕通知时遇到的问题

来源：互联网发布：淘宝客 2016 qq空间编辑：程序博客网时间：2024/06/05 23:06

声明一个通知类同时继承MethodBeforeAdvice、AfterReturningAdvice和MethodInterceptor

package com.zx.aop;import java.lang.reflect.Method;import org.aopalliance.intercept.MethodInterceptor;import org.aopalliance.intercept.MethodInvocation;import org.springframework.aop.AfterReturningAdvice;import org.springframework.aop.MethodBeforeAdvice;public class MyMethodAdvice implements MethodBeforeAdvice,AfterReturningAdvice,MethodInterceptor {@Overridepublic void before(Method method, Object[] args, Object target) throws Throwable {// TODO Auto-generated method stubSystem.out.println("前置通知");}@Overridepublic void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable {// TODO Auto-generated method stubSystem.out.println("后置通知");} @Overridepublic Object invoke(MethodInvocation invocation) throws Throwable {// TODO Auto-generated method stubSystem.out.println("调用方法前");Object proceed = invocation.proceed();System.out.println("调用方法后");return proceed;}}

配置xml

<!-- 1.配置被代理的对象 --><bean id="test1Service" class="com.zx.aop.Test1Service"><property name="name" value='zx'></property></bean><!-- 2.配置通知对象 --><bean id="myMethodAdvice" class="com.zx.aop.MyMethodAdvice"></bean><!-- <bean id="MyMethodInterceptor" class="com.zx.aop.MyMethodInterceptor"></bean> --><!-- 3.配置代理对象   --><bean id="proxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean"><!-- 配置代理接口  代理对象将实现代理的接口 可以不设置--><!-- <property name="proxyInterfaces"><list><value>com.zx.aop.TestServiceTnter</value></list></property> --><!-- 4.把通知织入代理对象 可以是list --><property name="interceptorNames"><list><value>myMethodAdvice</value><!-- <value>MyMethodInterceptor</value> --></list></property><!-- 5.配置被代理对象 必须要有 --><property name="target" ref="test1Service"></property></bean>

运行代码

TestServiceTnter ts1=(TestServiceTnter) context.getBean("proxyFactoryBean");ts1.sayHello();

输出

调用方法前
前置通知
Hello zx
后置通知
调用方法后

将前置通知后置通知与环绕通知类分开实现

前置加后置类

package com.zx.aop;import java.lang.reflect.Method;import org.springframework.aop.AfterReturningAdvice;import org.springframework.aop.MethodBeforeAdvice;public class MyMethodAdvice implements MethodBeforeAdvice,AfterReturningAdvice {@Overridepublic void before(Method method, Object[] args, Object target) throws Throwable {// TODO Auto-generated method stubSystem.out.println("前置通知");}@Overridepublic void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable {// TODO Auto-generated method stubSystem.out.println("后置通知");}}

环绕通知类

package com.zx.aop;import org.aopalliance.intercept.MethodInterceptor;import org.aopalliance.intercept.MethodInvocation;public class MyMethodInterceptor implements MethodInterceptor {@Overridepublic Object invoke(MethodInvocation invocation) throws Throwable {// TODO Auto-generated method stubSystem.out.println("调用方法前");Object proceed = invocation.proceed();System.out.println("调用方法后");return proceed;}}

配置xml

<!-- 1.配置被代理的对象 --><bean id="test1Service" class="com.zx.aop.Test1Service"><property name="name" value='zx'></property></bean><!-- 2.配置通知对象 --><bean id="myMethodAdvice" class="com.zx.aop.MyMethodAdvice"></bean><bean id="MyMethodInterceptor" class="com.zx.aop.MyMethodInterceptor"></bean><!-- 3.配置代理对象   --><bean id="proxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean"><!-- 配置代理接口  代理对象将实现代理的接口 可以不设置--><!-- <property name="proxyInterfaces"><list><value>com.zx.aop.TestServiceTnter</value></list></property> --><!-- 4.把通知织入代理对象 可以是list --><property name="interceptorNames"><list><value>myMethodAdvice</value><value>MyMethodInterceptor</value></list></property><!-- 5.配置被代理对象 必须要有 --><property name="target" ref="test1Service"></property></bean>

运行代码不变运行结果

前置通知
调用方法前
Hello zx
调用方法后
后置通知

更改xml中interceptorNames属性中两个通知类的顺序再次运行结果如下

调用方法前
前置通知
Hello zx
后置通知
调用方法后

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