AspectJ介绍：
AspectJ是一个面向切面的框架，它扩展了Java语言。
AspectJ定义了AOP语法所以它有一个专门的编译器用来生成遵守Java字节编码规范的Class文件.
Spring 可以使用了和AspectJ 5一样的注解，并使用AspectJ来做切入点解析和匹配。
但是，AOP在运行时仍旧是纯的Spring AOP，并不依赖于AspectJ的编译器或者织入器（weaver）。
aspectJ下载：http://www.eclipse.org/aspectj/downloads.php
采用AspectJ声明实现AOP：
接口UserManager.java:
1 package com.springdemo.manager;
2
3 public interface UserManager {
4 public void add(String name,String password);
5 public void delete(String name);
6 public int count();
7 }
8
类UserManagerImpl.java:
代码
1 package com.springdemo.manager;
2
3
4 public class UserManagerImpl implements UserManager {
5
6 public void add(String name, String password) {
7 System.out.println(" do add user ... ");
8 }
9
10 public void delete(String name) {
11 System.out.println(" do delete user ... ");
12 }
13
14 public int count() {
15 return 10;
16 }
17 }
18
切面UserManagerHandler.java:
代码
1 package com.springdemo.manager;
2
3 import org.aspectj.lang.annotation.Aspect;
4 import org.aspectj.lang.annotation.Before;
5 import org.aspectj.lang.annotation.Pointcut;
6
7 @Aspect
8 public class UserManagerHandler {
9
10 /**
11 * PointCut名，不能有返回值
12 */
13 @Pointcut("execution(* *.*(..))")
14 public void pointCutMethods(){}
15
16 /**
17 * 定义Advice
18 */
19 @Before("pointCutMethods()")
20 public void checkPower() {
21 System.out.println("check manager power ....");
22 }
23 }
24
bean.xml:
代码
1 <beans xmlns="http://www.springframework.org/schema/beans"
2 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
3 xmlns:util="http://www.springframework.org/schema/util"
4 xmlns:aop="http://www.springframework.org/schema/aop"
5 xsi:schemaLocation="http://www.springframework.org/schema/beans
6 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
7 http://www.springframework.org/schema/context
8 http://www.springframework.org/schema/context/spring-context-3.0.xsd
9 http://www.springframework.org/schema/util
10 http://www.springframework.org/schema/util/spring-util-3.0.xsd
11 http://www.springframework.org/schema/aop
12 http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
13
14
15 <aop:aspectj-autoproxy/>
16 <bean id="UserManagerHandler" class="com.springdemo.manager.UserManagerHandler"/>
17 <bean id="UserManagerImpl" class="com.springdemo.manager.UserManagerImpl"/>
18 </beans>
19
测试代码：
代码
1 package com.springdemo.client;
2
3 import org.springframework.beans.factory.BeanFactory;
4 import org.springframework.context.support.ClassPathXmlApplicationContext;
5 import com.springdemo.manager.UserManager;
6
7 public class Client {
8 public static void main(String[] args) {
9 //Resource res = new ClassPathResource("bean.xml");
10 //BeanFactory fac = new XmlBeanFactory(res);
11 BeanFactory fac = new ClassPathXmlApplicationContext("bean.xml");
12 UserManager userManager = (UserManager)fac.getBean("UserManagerImpl");
13 userManager.add("pxl..", "pwd..");
14 }
15
16 }
17
基于Schema的AOP实现：
UserManager.java 和 UserManagerImpl.java 代码同上。
切面UserManagerHandler.java：
1 package com.springdemo.manager;
2 public class UserManagerHandler {
3 public void checkPower() {
4 System.out.println("check manager power ....");
5 }
6 }
配置Spring容器bean.xml：
代码
1 <beans xmlns="http://www.springframework.org/schema/beans"
2 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
3 xmlns:util="http://www.springframework.org/schema/util"
4 xmlns:aop="http://www.springframework.org/schema/aop"
5 xsi:schemaLocation="http://www.springframework.org/schema/beans
6 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
7 http://www.springframework.org/schema/context
8 http://www.springframework.org/schema/context/spring-context-3.0.xsd
9 http://www.springframework.org/schema/util
10 http://www.springframework.org/schema/util/spring-util-3.0.xsd
11 http://www.springframework.org/schema/aop
12 http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
13
14 <bean id="UserManagerHandler" class="com.springdemo.manager.UserManagerHandler"/>
15 <bean id="UserManagerImpl" class="com.springdemo.manager.UserManagerImpl"/>
16
17 <aop:config>
18 <aop:aspect id="UserMangerAspect" ref="UserManagerHandler">
19 <aop:pointcut expression="execution(* *.*(..))" id="pointCutMethods"/>
20 <aop:before method="checkPower" pointcut-ref="pointCutMethods" />
21 </aop:aspect>
22 </aop:config>
23 </beans>
测试代码：
代码
1 package com.springdemo.client;
2
3 import org.springframework.beans.factory.BeanFactory;
4 import org.springframework.context.support.ClassPathXmlApplicationContext;
5
6 import com.springdemo.manager.UserManager;
7
8 public class Client {
9 public static void main(String[] args) {
10 //Resource res = new ClassPathResource("bean.xml");
11 //BeanFactory fac = new XmlBeanFactory(res);
12 BeanFactory fac = new ClassPathXmlApplicationContext("bean.xml");
13 UserManager userManager = (UserManager)fac.getBean("UserManagerImpl");
14 userManager.add("pxl..", "pwd..");
15 }
16
17 }