学习笔记：AOP(before、after)
代码(转bea)
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<!-- mypack.MethodTracing-->
<!-- Bean configuration -->
<bean id="businesslogicbean"
/>
</property>
<property name="interceptorNames">
<list>
<value>theTracingBeforeAdvisor</value>
<value>theTracingAfterAdvisor</value>
</list>
</property>
</bean>
<!-- Bean Classes -->
<bean id="beanTarget" />
<!-- Advisor pointcut definition for before advice -->
<bean id="theTracingBeforeAdvisor"
/>
</property>
<property name="pattern">
<value>.*</value>
</property>
</bean>
<!--<value>.*</value>：该表达式选择advisor所关联到的一个或多个bean上的所有联结点。 -->
<!--<value>./IBusinessLogic/.foo</value>：该表达式只选择IbusinessLogic接口上的foo()方法的联结点。-->
<!--如果是advisor所关联到的bean，则该表达式只选择IBusinessLogic接口上的联结点。 -->
<!-- Advisor pointcut definition for after advice -->
<bean id="theTracingAfterAdvisor"
/>
</property>
<property name="pattern">
<value>.*</value>
</property>
</bean>
<!-- Advice classes -->
<bean id="theTracingBeforeAdvice" />
<bean id="theTracingAfterAdvice" />
</beans>
IBusinessLogic
public interface IBusinessLogic {public void foo();}BusinessLogic
public class BusinessLogic implements IBusinessLogic {public void foo() { System.out.println( "Inside BusinessLogic.foo()"); }}TracingAfterAdvice.java
public class TracingAfterAdvice implements AfterReturningAdvice {public void afterReturning(Object arg0, Method arg1, Object[] arg2,Object arg3) throws Throwable {System.out.println( "Hello world! (by " + this.getClass().getName() + ")");}}TracingBeforeAdvice.java
public class TracingBeforeAdvice implements MethodBeforeAdvice {public void before(Method arg0, Object[] arg1, Object arg2) throws Throwable {System.out.println( "Hello world! (by " + this.getClass().getName() + ")");}}main
public class MainApplication {/** * @param args */public static void main(String[] args) {// Read the configuration file// ApplicationContext ctx = new FileSystemXmlApplicationContext("springconfig.xml");ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); //Instantiate an object IBusinessLogic testObject = (IBusinessLogic) ctx.getBean("businesslogicbean"); // Execute the public // method of the bean testObject.foo();}} 1 楼 raykcn 2007-01-05 希望还有下文.... 2 楼 lighter 2007-01-05 就我自身用过的情况来说.Around处理用得比较多,before,after比较少一些 3 楼 magice 2007-01-07 AOP在项目中能够适用哪些情况呢？
用在权限的鉴权方面比较好，但是acegi框架这部分已经做的很好了，所以觉得AOP的用武之地不适很多。。。 4 楼 piaoling 2007-01-08 想问一下Spring里面的功能，开发时能用到多少？ 5 楼 magice 2007-01-08 主要还是在用IOC,使用的多了，思维模式就越来越有spring味道了，
而AOP用的地方到不是很多，因为需要用的地方－如权限，都有现成的产品可以集成－如acegi 6 楼 dzgwt2004 2007-01-08 java里面有回调函数么？
我想利用AOP是否可以实现方法的回调，就像C#里面的委托一下
不知道是否可行