Spring中的前置增强和后置增强

前置增强

接口：

/**
 * 接口
 * Created by Administrator on 2017/10/7.
 */
public interface ISomeService {
    public  void  SomeService();
}


实现类：

/**
 * 
 * Created by Administrator on 2017/10/7.
 */
public class SomeService implements ISomeService{
    //核心业务
    public  void SomeService(){
        System.out.println("================before=================");

    }
}


前置通知

import org.springframework.aop.MethodBeforeAdvice;
import java.lang.reflect.Method;

/**
 * Created by Administrator on 2017/10/7.
 */
//前置通知
public class MyBeforeAdvise implements MethodBeforeAdvice {
    public void before(Method method, Object[] objects, Object o) throws Throwable {
        System.out.println("======================前置增强=================");

    }
}


配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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
         http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context.xsd
">
    <!--前置增强-->
     <!--目标对象-->
      <bean id="someService" class="cn.happy.qianzhibefore.SomeService"></bean>
      <!--增强 通知-->
      <bean id="beforeadvise" class="cn.happy.qianzhibefore.MyBeforeAdvise"></bean>
      <!--aop-->
      <bean id="proxyService" class="org.springframework.aop.framework.ProxyFactoryBean">
            <!--配置需要增强的目标对象-->
            <property name="target" ref="someService"></property>
            <!--做怎么样的增强-->
            <property name="interceptorNames" value="beforeadvise"></property>
          <!--手动设置返回类型为class-->
            <property name="proxyTargetClass" value="true"></property>
      </bean>
</beans>


测试类

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 测试类
 * Created by Administrator on 2017/10/7.
 */
public class Test20171007 {
    /**
     * 前置增强
     */
    @Test
    public void Test(){
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContextQianZhiBefore.xml");
        SomeService someService=(SomeService)context.getBean("proxyService");
        someService.SomeService();
    }
}


后置增强

接口
/**
 * 接口
 * Created by Administrator on 2017/10/7.
 */
public interface ISomeService {
    public void SomeService();
}


实现类

/**
 * 实现类
 * Created by Administrator on 2017/10/7.
 */
public class SomeService implements ISomeService{
    //核心业务
    public  void SomeService(){
        System.out.println("========after==========");

    }
}

效果图：

后置通知

import org.springframework.aop.AfterReturningAdvice;
import java.lang.reflect.Method;

/**
 * 后置增强
 * Created by Administrator on 2017/10/7.
 */
public class MyAfterAdvise implements AfterReturningAdvice{
    public void afterReturning(Object o, Method method, Object[] objects, Object o1) throws Throwable {
        System.out.println("================after============================");
    }
}

配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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
         http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context.xsd
">
    <!--后置增强-->
     <!--目标对象-->
      <bean id="someService" class="cn.happy.houzhiafter.SomeService"></bean>
      <!--增强 通知-->
      <bean id="afteradvise" class="cn.happy.houzhiafter.MyAfterAdvise"></bean>
      <!--aop-->
      <bean id="proxyService" class="org.springframework.aop.framework.ProxyFactoryBean">
            <!--配置需要增强的目标对象-->
            <property name="target" ref="someService"></property>
            <!--做怎么样的增强-->
            <property name="interceptorNames" value="afteradvise"></property>
      </bean>

</beans>



测试类

/**
 * 后置增强
 */
@Test
public void Test(){
    ApplicationContext context=new ClassPathXmlApplicationContext("applicationContextQianZhiAfter.xml");
    ISomeService someService=(ISomeService)context.getBean("proxyService");
    someService.SomeService();
}


效果图：