注意：Action如果实现了Action接口，或者继承了ActionSupport类，则要在aop:config标签添加 proxy-target-class="true"，否者会抛异常。

新建文件：DebugLogger.java：

import org.apache.log4j.Logger;

import org.aspectj.lang.JoinPoint;
public class DebugLogger{
Logger logger = Logger.getLogger(DebugLogger.class);
StringBuffer buffer = new StringBuffer();
        public void log(JoinPoint joinPoint) {
        Object[] args = joinPoint.getArgs();
        buffer.delete(0, buffer.length()).append("enter function: ").append(joinPoint.getSignature()).append(", parameters: ");
        if (args != null) {
            for (Object obj : args) {
              buffer.append(obj);
            }   
        }
        if (logger.isDebugEnabled())
        {
          logger.debug(buffer.toString());
        }       

    }

    public void logWithReturn(JoinPoint joinPoint, Object returnObj) {
        buffer.delete(0, buffer.length()).append("exit function：").append(joinPoint.getSignature()).append(", return value：").append(returnObj);
        if (logger.isDebugEnabled())
        {
          logger.debug(buffer.toString());
        }
    }
}

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更改applicationContext.xml文件：

<bean id="debugLogger" class="com.shenzhen.management.util.log.DebugLogger"></bean>

<aop:config  proxy-target-class="true">
       <aop:pointcut id="logPointcut" expression="execution(* com.shenzhen.management.action.*.*(..))
                                              or execution(* com.shenzhen.management.service.*.*(..))
                                              or execution(* com.shenzhen.management.dao.*.*(..))"/>
      <aop:aspect id="logAspect" ref="debugLogger">  
        <aop:before method="log" pointcut-ref="logPointcut"/>
        <aop:after-returning method="logWithReturn" returning="returnObj" pointcut-ref="logPointcut"/>
      </aop:aspect>
</aop:config>