Spring AOP实现日志输出

================接口类TimeBookInterface ============== package com.gc.action.springaop; /**  * 接口类  * @author yltd  *  */ public interface TimeBookInterface {     public void doSameing(String name); } ==============接口实现类TimeBookImpl ====================== package com.gc.action.springaop; /**  * 接口实现类  * @author yltd  *  */ public class TimeBookImpl implements TimeBookInterface {     @Override     public void doSameing(String name) {        System.out.println(name);     } } ===============日志输出类LogAround ================== package com.gc.action.springaop; import org.aopalliance.intercept.MethodInterceptor; import org.aopalliance.intercept.MethodInvocation; import org.apache.log4j.Level; import org.apache.log4j.Logger; /**  * AOP实现输出日志  * @author yltd  *  */ public class LogAround implements MethodInterceptor {     Logger logger =Logger.getLogger(this.getClass().getName());     @Override     public Object invoke(MethodInvocation arg) throws Throwable {        logger.log(Level.INFO, "开始。。。");        Object obj = arg.proceed();               logger.log(Level.INFO, "结束。。。");        return obj;     } } =============XML配置文件config.xml================== <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"  "http://www./dtd/spring-beans.dtd">  <beans>  <!-- 负责国际化支持 --> <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">     <!-- 国际化支持的定义在文件名为messages的文件中 -->     <property name="basename">        <value>messages</value>     </property> </bean>     <bean id="log" class="com.gc.action.springaop.LogAround"></bean>     <bean id="timeBook" class="com.gc.action.springaop.TimeBookImpl"></bean>     <bean id="logProxy" class="org.springframework.aop.framework.ProxyFactoryBean">        <property name="proxyInterfaces">            <value>com.gc.action.springaop.TimeBookInterface</value>        </property>        <property name="target">            <ref bean="timeBook"/>        </property>        <!-- 指定要代理的类 -->        <property name="interceptorNames">            <list>               <value>log</value>            </list>        </property>     </bean>  </beans> ====================测试类TestMain ================ package com.gc.action.springaop; import org.springframework.context.ApplicationContext; import org.springframework.context.support.FileSystemXmlApplicationContext; /**  * 测试类  * @author yltd  *  */ public class TestMain {     public static void main(String[] args) {        ApplicationContext ac =new FileSystemXmlApplicationContext("classpath:/SpringConfig.xml");        TimeBookInterface tbi=(TimeBookInterface) ac.getBean("logProxy");        tbi.doSameing("张艺馨");     } } ====================结果====================== - Refreshing org.springframework.context.support.FileSystemXmlApplicationContext@4e515669: startup date [Fri Oct 19 16:13:27 CST 2018]; root of context hierarchy - Loading XML bean definitions from class path resource [SpringConfig.xml] - 开始。。。 张艺馨 - 结束。。。