spring 面向切面编程，在执行SQL时打印类名及方法名

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需求：在所有打印SQL语句前，加上SQL所在的类名及方法名。

解决方法：使用spring面向切面编程。

具体代码：

package com.hys.qiantai.struts.action.liveservice;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.log4j.Logger;
/**
 */
public class LogDaoMethodPointcut implements MethodInterceptor {
	
	private static final Logger logger = Logger.getLogger(LogDaoMethodPointcut.class);
	
	@Override
	public Object invoke(MethodInvocation arg0) throws Throwable {
		System.out.println("Before: class: {} " + arg0.getThis().getClass());
		System.out.println("Method name: {} " + arg0.getMethod().getName());
		logger.info("Before: class: {} " + arg0.getThis().getClass());
		logger.info("Method name: {} " + arg0.getMethod().getName());  
        return arg0.proceed(); 
	}

}

在spring xml文件中添加切面：

<!-- 方法拦截器  MethodInterceptor applicationContext_transaction.xml -->  
  <bean id="logDaoMethodPointcut" class="com.hys.qiantai.struts.action.liveservice.LogDaoMethodPointcut"></bean>
  <aop:config proxy-target-class="true">  
      <aop:pointcut id="daoMethodPointcut" expression="execution(* com.hys.exam.dao.local.jdbc.*.*(..))"/>  
      <aop:advisor advice-ref="logDaoMethodPointcut" pointcut-ref="daoMethodPointcut" />  
  </aop:config>