AOP切点切面内容

时间：2017-11-24 00:16:45 阅读：132 评论：0 收藏：0 [点我收藏+]

一、实现接口MethodBeforeAdvice该拦截器会在调用方法前执行

实现接口 AfterReturningAdvice该拦截器会在调用方法后执行

实现接口 MethodInterceptor该拦截器会在调用方法前后都执行，实现环绕结果。

[java] view plain copy

package com.ly.model;
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 Advice implements MethodBeforeAdvice,AfterReturningAdvice,MethodInterceptor{
@Override
public void before(Method arg0, Object[] arg1, Object arg2) throws Throwable {
saveBeforeMessage();
}
@Override
public void afterReturning(Object arg0, Method arg1, Object[] arg2, Object arg3) throws Throwable {
saveAfterMessage();
}
public void saveBeforeMessage(){
System.out.println("调用BeforeAdvice成功");
}
public void saveAfterMessage(){
System.out.println("调用AfterAdvice成功");
}
@Override
public Object invoke(MethodInvocation arg0) throws Throwable {
System.out.println("调用RoundService之前成功");
Object result=arg0.proceed();
System.out.println("调用RoundService之后成功");
return result;
}
}

以下为AOPservice的实现

[java] view plain copy

以下为配置文件信息

[html] view plain copy

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<bean id="AOPservice" class="com.ly.service.impl.AOPServiceImpl">
</bean>
<bean id="adviceMessage" class="com.ly.model.Advice"></bean>
<bean id="adviser" class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name="advice" ref="adviceMessage"></property>
<property name="pattern"
value="com\.ly\.service\.impl\.AOPServiceImpl\.print"></property>
</bean>
<bean id="proxyService" class="org.springframework.aop.framework.ProxyFactoryBean">
<!-- 设置目标（target）bean为 AOPservice，
多个bean可以设置list集合如
<property name="interceptorNames">
<list>
<value>advisor</value>
<value>advisor1</value>
</list>
</property>-->
<property name="target">
<ref bean="AOPservice" />
</property>
<property name="interceptorNames">
<value>adviser</value>
</property>
</bean>
</beans>

以下为测试类

[java] view plain copy

package com.ly.control;
import java.io.IOException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.UrlResource;
import com.ly.service.AOPService;
public class SpringTest {
public static void main(String[] args) throws IOException {
ApplicationContext applicationContext=new ClassPathXmlApplicationContext(new String[]{"springBeans.xml"});
AOPService aopservice= (AOPService) applicationContext.getBean("proxyService");
//由于在springBeans.xml中只配置了 value="com\.ly\.service\.impl\.AOPServiceImpl\.print"适配print方法，没有适配save方法，故只有调用print方法时才会执行advice通知
aopservice.print("调用print成功==========》");
aopservice.save();
}
}

二、在web应用中调用时需要用WebApplicationContext这个来得到Spring配置中的bean类

[java] view plain copy

public class UserAction extends ActionSupport {
private static final Logger log = Logger.getLogger(UserAction.class);
private UserService userService;
public UserService getUserService(){
if(userService == null){
WebApplicationContext applicationContext = WebApplicationContextUtils.getWebApplicationContext(ServletActionContext.getRequest().getServletContext());
userService = (UserService) applicationContext.getBean("proxyService");
// userService = new UserServiceImpl();
}
return userService;
}

原文地址：http://www.cnblogs.com/wxj-106/p/7886687.html

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