1. 文件结构
2.pom文件导入包
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.wyyblog.demo</groupId>
<artifactId>spring_aop01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring_aop01</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.3.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-core</artifactId>
<version>4.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>4.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>4.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-ldap</artifactId>
<version>4.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-acl</artifactId>
<version>4.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-cas</artifactId>
<version>4.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-taglibs</artifactId>
<version>4.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.5.RELEASE</version>
</dependency>
<!-- aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.7.2</version>
</dependency>
</dependencies>
</project>
3.后置增强 AfterLog.java
package com.wyyblog.spring_aop.log;
import java.lang.reflect.Method;
import org.springframework.aop.AfterReturningAdvice;
public class AfterLog implements AfterReturningAdvice{
/**
* 目标方法执行后的通知
*/
public void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable {
System.out.println(target.getClass().getName()+"的"+method.getName()+"方法执行之后被调用");
}
}
4.前置增强 Log.java
package com.wyyblog.spring_aop.log;
import java.lang.reflect.Method;
import org.springframework.aop.MethodBeforeAdvice;
public class Log implements MethodBeforeAdvice {
/**
* @param method 被调用的方法对象
* @param args 被调用的方法参数
* @param target 被调用的方法的目标对象
*/
public void before(Method method, Object[] args, Object target)
throws Throwable {
System.out.println(target.getClass().getName()+"的"+method.getName()+"方法被调用");
}
}
5.UserService.java接口
package com.wyyblog.spring_aop.service;
public interface UserService {
public void add();
public void search();
public void delete();
public void update();
}
6.UserServiceImpl.java接口实现
package com.wyyblog.spring_aop.service;
public class UserServiceImpl implements UserService{
public void add() {
System.out.println("add");
}
public void delete() {
System.out.println("delete");
}
public void search() {
System.out.println("search");
}
public void update() {
System.out.println("update");
}
}
7.beans.xml配置
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
<bean id="userService" class="com.wyyblog.spring_aop.service.UserServiceImpl"/>
<bean id="log" class="com.wyyblog.spring_aop.log.Log"/>
<bean id="afterLog" class="com.wyyblog.spring_aop.log.AfterLog"></bean>
<aop:config>
<aop:pointcut expression="execution(* com.wyyblog.spring_aop.service.UserServiceImpl.*(..))" id="pointcut"/>
<aop:advisor advice-ref="log" pointcut-ref="pointcut"/>
<aop:advisor advice-ref="afterLog" pointcut-ref="pointcut"/>
</aop:config>
</beans>
8.测试类
package com.wyyblog.spring_aop.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.wyyblog.spring_aop.service.UserService;
public class Test {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
UserService userService = (UserService)context.getBean("userService");
userService.update();
}
}
spring aop就是将公共的业务（如日志、安全）和领域业务结合，当执行领域业务时将会把公共业务加进来，实现公共业务的重复利用。领域业务将变得更纯粹。而程序员就是专注于领域业务，其本质就是动态代理
动态代理：动态代理