TestApp.java
package cn.podger.spring.demo2;
import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
/**
*
* 在上一案例,应该对spring的ioc功能有一定的了解 这个项目的代码为展示spring的AOP功能. AOP
* 全称解析为面向切面编程,它的实现原理就是通过代理去试试.
* 因此spring使用策略模式,提供2种不同的实现方式,一种是基于CGLIB.一种是JDK的动态代理的方式.
* 这2种的实现区别是:cglib是基于类,而JDK的动态代理通过去实现InvocationHandler接口去实现, 代理的类都需要接口.
* 对于这2种实现方式,这里就不详细说明了.相应的文章颇多.
*/
public class TestApp {
private static ApplicationContext context = null;
@BeforeClass
public static void setUpBeforeClass() throws Exception {
context = new FileSystemXmlApplicationContext("applicationContext.xml");
}
@Test
public void testMethod() throws Exception {
UserService us = (UserService) context.getBean(UserService.class);
us.findUserById(100L);
}
}
AspectConfig .java
package cn.podger.spring.demo2;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
@Aspect
@Component
public class AspectConfig {
@Pointcut("execution(* cn.podger.spring.demo2.UserService.*(..))")
public void aspect() {
}
@Before("aspect()")
public void before(JoinPoint joinPoint) {
System.out.println("执行前...");
}
@After("aspect()")
public void after(JoinPoint joinPoint) {
System.out.println("执行后...");
}
}
UserService .java
package cn.podger.spring.demo2;
import org.springframework.stereotype.Service;
@Service
public class UserService {
public void findUserById(Long id) {
System.out.println("根据ID查询用户...");
}
}
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
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-3.0.xsd">
<context:component-scan base-package="cn.podger.spring.demo2" />
<aop:aspectj-autoproxy />
</beans>
结果
项目下载http://download.csdn.net/detail/bojie5744/9546346