AOP的实现
1.先做一个接口 里有 foo()方法
?package com.lily.rules;
?public interface IUserDAO {
??public void foo();
?}
2.在做一个实现接口的类
?package com.lily.rules;
?public class UserDAOImp implements IUserDAO {
?public void foo() {//固定的方法
??// TODO Auto-generated method stub
??System.out.println("hello first");
?}
?}
3.做一个测试类
?package com.lily.rules;
?import org.springframework.context.ApplicationContext;
?import org.springframework.context.support.FileSystemXmlApplicationContext;
?public class MainApplication {
?public static void main(String args[]){
??ApplicationContext? txt = new FileSystemXmlApplicationContext??
("D:\\workspace\\FirstSample\\com\\lily\\rules\\applicationContext.xml");
??IUserDAO? log??? = (IUserDAO) txt.getBean("businesslogicbean");
??log.foo();
?}
?}
?}
4.做一个Before类:固定的类名和实现的接口
?package com.lily.rules;
?import java.lang.reflect.Method;
?import org.springframework.aop.MethodBeforeAdvice;
?public class TracingBeforeAdvice implements MethodBeforeAdvice {
?public void before(Method arg0, Object[] arg1, Object arg2)
???throws Throwable {
??// TODO Auto-generated method stub
??System.out.println(" hello before");
?}
?}
5.开始做After类:固定的类名和实现的接口
?package com.lily.rules;
?import java.lang.reflect.Method;
?import org.springframework.aop.AfterReturningAdvice;
?public class TracingAfterAdvice implements AfterReturningAdvice {
?public void afterReturning(Object arg0, Method arg1, Object[] arg2,
???Object arg3) throws Throwable {
????????? System.out.println("hello after");
?}
6.做配置信息 applicationContext.xml文件
<beans></beans>
一个完整的切面操作代码完成了!!
