Spring 2.0 技术手册学习笔记(一)

AOP中有几种Advice: BeforeAdvice,AfterAdvice,AroundAdvice,ThrowAdvice;

以下仅列出两种作为代表:(before,after两种)

接口：

public interface IHello {

public void hello(String name);
}

实现的类：

public class HelloSpeaker implements IHello {

@Override
public void hello(String name) {
// TODO Auto-generated method stub

        System.out.println("Hello,"+name);
}

}

BeforeAdvice:

import java.lang.reflect.Method;
import java.util.logging.*;

import org.springframework.aop.MethodBeforeAdvice;

public class LogBeforeAdvice implements MethodBeforeAdvice{

private Logger logger=Logger.getLogger(this.getClass().getName());

public void before(Method method,Object[] args,Object target)throws Throwable
{
    logger.log(Level.INFO,"method starts..."+method);
}

}

AfterAdvice:

import org.springframework.aop.AfterReturningAdvice;

import java.lang.reflect.Method;
import java.util.logging.*;

public class LogAfterAdvice implements AfterReturningAdvice{

private Logger logger=Logger.getLogger(this.getClass().getName());

public void afterReturning(Object object,Method method,Object[] args,
               Object target)throws Throwable
{
logger.log(Level.INFO,"method ends..."+method);
}
}

配置文件:

<?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-2.0.xsd">

   <bean id="logBeforeAdvice" class="LogBeforeAdvice"></bean>
   <bean id="logAfterAdvice" class="LogAfterAdvice"></bean>
   <bean id="helloSpeaker" class="HelloSpeaker"></bean>
   <bean id="helloProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
      <property name="proxyInterfaces" value="IHello"></property>
      <property name="target" ref="helloSpeaker"></property>
      <property name="interceptorNames">
         <list>
            <value>logBeforeAdvice</value>
            <value>logAfterAdvice</value>
         </list>
      </property>
   </bean>
  
</beans>

测试文件:

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;


public class Test {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub

ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
    IHello helloProxy=(IHello)context.getBean("helloProxy");
    helloProxy.hello("Justin");
}

}