public interface Animal {//主业务接口void  eat();  //目标方法void  sleep();
}

public class Dog implements Animal {//目标对象/** 专心我们的逻辑  * 至于方法之前和方法之后要做的事情！我不关注！* Ioc:降低了主业务之间的耦合度* AOP：降低了主业务和交叉业务逻辑之间的耦合度*/@Overridepublic void eat() {System.out.println("Dog在吃骨头");}@Overridepublic void sleep() {System.out.println("Dog睡觉");}}

public class AnimalBeforeAdvice implements MethodBeforeAdvice {/*** method:执行的方法* args：方法的参数* target:目标类对象*/@Overridepublic void before(Method method, Object[] args, Object target)throws Throwable {System.out.println("进入 了 前置 增强..............MethodBeforeAdvice");}}

<?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:p="http://www.springframework.org/schema/p"  xmlns:c="http://www.springframework.org/schema/c"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="
        http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置 目标对象 -->
<bean id="dog" class="cn.bdqn.dao.impl.Dog"/><!-- 配置前置 增强 -->
<bean id="before" class="cn.bdqn.advice.AnimalBeforeAdvice"/><!--  生成 代理对象  --><bean id="proxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean"><!-- 设置目标对象（被代理的对象）<property name="targetName" value="dog"/>  --><property name="target" ref="dog"/><!-- 设置增强方式 --><property name="interceptorNames"><value>before</value></property></bean></beans>

public class AnimalTest {@Testpublic  void  test01(){    ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");//使用代理对象进行操作Animal animal=(Animal) context.getBean("proxyFactoryBean");animal.eat();System.out.println("************");animal.sleep();}
}

public class AnimalAfterAdvice implements AfterReturningAdvice {
/*** returnValue:返回值 ,能获取返回值 但是如果对返回值进行了操作！没有意义！* afterReturning（）就没有返回值*/@Overridepublic void afterReturning(Object returnValue, Method method,Object[] args, Object target) throws Throwable {System.out.println("执行了 后置 通知.................AfterReturningAdvice");}}

<?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:p="http://www.springframework.org/schema/p"  xmlns:c="http://www.springframework.org/schema/c"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="
        http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置 目标对象 -->
<bean id="dog" class="cn.bdqn.dao.impl.Dog"/><!-- 配置前置 通知-->
<bean id="before" class="cn.bdqn.advice.AnimalBeforeAdvice"/>
<!-- 配置后置 通知-->
<bean id="after" class="cn.bdqn.advice.AnimalAfterAdvice"/><!--  生成 代理对象  --><bean id="proxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean"><!-- 设置目标对象（被代理的对象）<property name="targetName" value="dog"/>  --><property name="target" ref="dog"/><!-- 设置增强方式     同时配置多个增强方式01 .value="before,after"--><property name="interceptorNames" ><!--   02. 使用array<array><value>before</value><value>after</value></array> --><list><value>before</value><value>after</value></list></property></bean></beans>

public class AnimalAroundAdvice implements MethodInterceptor {
/*** * 环绕增强  是在前置增强之后  和后置增强之前  执行！* 可以对方法的返回值进行一系列的操作*/@Overridepublic Object invoke(MethodInvocation invocation) throws Throwable {System.out.println("方法之前........MethodInterceptor");Object result = invocation.proceed();//判断是否有返回值if (result!=null) {  result=((String)result).toUpperCase();}System.out.println("方法之后........MethodInterceptor");return result;}}

public interface Animal {//主业务接口String  eat();  //目标方法void  sleep();
}

public class Dog implements Animal {//目标对象
    @Overridepublic String eat() {System.out.println("Dog在吃骨头");return  "abcd";}@Overridepublic void sleep() {System.out.println("Dog睡觉");}}

<?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:p="http://www.springframework.org/schema/p"  xmlns:c="http://www.springframework.org/schema/c"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置 目标对象 -->
<bean id="dog" class="cn.bdqn.dao.impl.Dog"/>
<!-- 配置环绕 通知-->
<bean id="around" class="cn.bdqn.advice.AnimalAroundAdvice"/><!--  生成 代理对象  --><bean id="proxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean"><property name="target" ref="dog"/><property name="interceptorNames" ><list><value>around</value></list></property></bean></beans>

    //测试返回值
    @Testpublic  void  test02(){    ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");//使用代理对象进行操作Animal animal=(Animal) context.getBean("proxyFactoryBean");System.out.println(animal.eat());System.out.println("************");animal.sleep();}

<?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:p="http://www.springframework.org/schema/p"  xmlns:c="http://www.springframework.org/schema/c"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置 目标对象 -->
<bean id="dog" class="cn.bdqn.dao.impl.Dog"/><!-- 配置前置 通知-->
<bean id="before" class="cn.bdqn.advice.AnimalBeforeAdvice"/><!-- 自定义通知的切入点  --><bean id="myAdvice" class="org.springframework.aop.support.NameMatchMethodPointcutAdvisor"><property name="advice"  ref="before"></property><property name="mappedNames"><list><value>eat</value> <!-- eat之外的方法就不会有前置通知了  --></list></property></bean><!--  生成 代理对象  --><bean id="proxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean"><property name="target" ref="dog"/><property name="interceptorNames" ><list><value>myAdvice</value>  <!--引入自定义增强  --></list></property></bean></beans>