spring_xml_AOP

一。配置服务类组件

@Component
public class UserService {
	
	private UserDAO userDAO;
	

	public void add(User u){
		this.userDAO.save(u);
	}

	public UserDAO getUserDAO() {
		return userDAO;
	}
	@Resource(name="userDAOImpl")
	public void setUserDAO(UserDAO userDAO) {
		this.userDAO = userDAO;
	}
	
}

@Resource自动装配

二。配置applicationContext.xml文件

<?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/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
	<!-- 配置自动装配 AutowiredAnnotationBeanPostProcessor等接口，实现注入等功能 -->
	<context:annotation-config/>
	<!-- 配置扫描包路径 -->
	<context:component-scan base-package="com.job"/>
	<!-- 声明一个类 -->
	<bean id="LogInteceptor" class="com.job.aop.LogInteceptor"></bean>
	
	<aop:config>
		<!-- 声明一个全局切点 ,id为切点id,expression作用到类的什么方法-->
		<aop:pointcut  id="servicePointcut" expression="execution (public * com.job..*.add(..))"/>
		<!-- 声明一个切面，id为切面id，ref表示这个类为切面类 -->
		<aop:aspect id="logAspect" ref="LogInteceptor">
			<!-- pointcut-ref切点执行，method作用切面类中的方法 -->
			<aop:before method="beforeMethod" pointcut-ref="servicePointcut"/>
		</aop:aspect>
		
		
		<!-- 另一种写法，声明一个私有切点-->
		<!-- id切面id,ref声明切面类 -->
		<aop:aspect id="logaspect2" ref="LogInteceptor">
			<!-- method切面类中方法  pointcut作用到类的什么方法 -->
			<aop:before method="beforeMethod" pointcut="execution (public * com.job..*.add(..))" />
		</aop:aspect> 
	</aop:config>
</beans>

三。编写切面类

public class LogInteceptor {
	
	public void beforeMethod(){
		System.out.println("Method start!");
	}
}

四。测试

public class UserServiceTest {
	public static void main(String[] args) {
		ApplicationContext ac =  new ClassPathXmlApplicationContext("applicationContext.xml");
		Service service = (Service)ac.getBean("userService");
		User u = new User();
		u.setUsername("me haha  ");
		service.add(u);
	}
}

五。测试结果
Method start!
me haha  ---haha!