Spring aop 编程

一.手动aop编程

接口：

/**
* 接口
*
*/
public interface UserService {

public void addUser();

public void saveUser();
}

目标类(实现类)

public class UserServiceImpl implements UserService{

@Override
public void addUser() {
// TODO Auto-generated method stub
System.out.println("添加用户");
}

@Override
public void saveUser() {
// TODO Auto-generated method stub
System.out.println("保存用户");
}

}

通知:

/**
* 继承aop联盟
*
*/
public class MyAuAspect implements MethodInterceptor{

@Override
public Object invoke(MethodInvocation invocation) throws Throwable {
// TODO Auto-generated method stub
System.out.println("开始执行");
Object obj=invocation.proceed();
System.out.println("执行结束");
return obj;
}

}

applicationContext.xml配置

<?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"
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"> <!--切面类 -->
<bean id="myAuAspectId" class="com.study.aop.MyAuAspect"></bean>
<!--目标类 -->
<bean id="userServiceId" class="com.study.poxy.UserServiceImpl"></bean>
<!--创建代理对象  -->
<bean id="poxyServiceId" class="org.springframework.aop.framework.ProxyFactoryBean">
<!--在之前我们学习jdk的动态代理和CGLIB的动态代理的时候,要传输接口，目标对象，方法的回调等参数，所以我们现在也要设置这些参数  -->
<property name="interfaces" value="com.study.poxy.UserService"></property>
<property name="target" ref="userServiceId"></property>
<property name="interceptorNames" value="myAuAspectId"></property>
</bean>
</beans>

测试：

@Test
public void Test(){
String xmlPath="com/study/test/applicationContext.xml";
ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlPath);
UserService  userService  = (UserService) applicationContext.getBean("poxyServiceId");
userService.addUser();
}

AOP全自动配置:

先添加Aspectj.weaver 包

<!--aspectj.weaver配置 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.5</version>
</dependency>

applicationContext1.xml配置

<?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: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/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!--切面类 -->
<bean id="myAuAspectId" class="com.study.aop.MyAuAspect"></bean>
<!--目标类 -->
<bean id="userServiceId" class="com.study.poxy.UserServiceImpl"></bean>
<!--
aop配置:
使用<aop:config>进行配置 proxy-target-class表示是否使用CGLIB动态代理
<aop:pointcut>设置切点，就是表明那些方法会被拦截，使用其代理
expression表达式说明:
execution(* com.itheima.c_spring_aop.*.*(..))
* com.itheima.c_spring_aop.*.*(..) 分别表示如下：
返回值,         包                                  类,方法,参数                     *表示任意
<aop:advisor> 设置切面，包括通知和切点
-->

<aop:config proxy-target-class="true">
<aop:pointcut expression="execution(* com.study.poxy.*.*(..))" id="pointCutId"/>
<aop:advisor advice-ref="myAuAspectId" pointcut-ref="pointCutId"/>
</aop:config>

</beans>

测试:

@Test
public void Test(){
String xmlPath="com/study/test/applicationContext1.xml";
ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlPath);
UserService  userService  = (UserService) applicationContext.getBean("userServiceId");
userService.addUser();
}