log4j.xml打印日志信息

Posted 2020-10-24 llguanli

log4j.xml文件

<?
xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
  
<log4j:configuration xmlns:log4j=‘http://jakarta.apache.org/log4j/‘ >
  
	<appender name="myConsole" class="org.apache.log4j.ConsoleAppender">
		<layout class="org.apache.log4j.PatternLayout">
		 	<param name="ConversionPattern"  
		  		value="[%d{dd HH:mm:ss,SSS\} %-5p] [%t] %c{2\} - %m%n" />
		</layout>
		<!--过滤器设置输出的级别-->
		<filter class="org.apache.log4j.varia.LevelRangeFilter">
			<param name="levelMin" value="debug" />
			<param name="levelMax" value="warn" />
			<param name="AcceptOnMatch" value="true" />
		</filter>
	</appender>

	<appender name="myFile" class="org.apache.log4j.RollingFileAppender">  
		<param name="File" value="D:/output.log" /><!-- 设置日志输出文件名称 -->
		<!-- 设置是否在又一次启动服务时，在原有日志的基础加入新日志 -->
		<param name="Append" value="true" />
		<param name="MaxBackupIndex" value="10" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="%p (%c:%L)- %m%n" />
		</layout>
	</appender>
 
	<appender name="activexAppender" class="org.apache.log4j.DailyRollingFileAppender">
		<param name="File" value="E:/activex.log" /> 
		<param name="DatePattern" value="‘.‘yyyy-MM-dd‘.log‘" /> 
		<layout class="org.apache.log4j.PatternLayout">
		 <param name="ConversionPattern" 
			value="[%d{MMdd HH:mm:ss SSS\} %-5p] [%t] %c{3\} - %m%n" />
		</layout> 
	</appender>
  
	<!-- 指定logger的设置，additivity指示是否遵循缺省的继承机制-->
	<logger name="com.util.TimerLogger" additivity="false">
		<priority value ="debug"/> 
		<appender-ref ref="activexAppender" /> 
	</logger>

	<!-- 根logger的设置-->
	<root>
		<priority value ="debug"/>
		<appender-ref ref="myConsole"/>
		<appender-ref ref="myFile"/>
		<appender-ref ref="activexAppender"/>	
	</root>
</log4j:configuration>

web.xml中载入

  <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j.xml</param-value>
  </context-param>

切面类

package com.aop;

import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import com.service.imp.UserServiceImpl;

public class MyAspect {
	//private static final Logger LOGGER=Logger.getLogger(MyAspect.class);
	//输出到指定文件
	private static final Logger LOGGER=Logger.getLogger("com.util.TimerLogger");

	    public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
	      	
	    	long time = System.currentTimeMillis();
	        Object retVal = pjp.proceed();
	        time = System.currentTimeMillis() - time;
	    	Object[] o=pjp.getArgs();
	  		for(int i=0;i<o.length;i++){
	  			LOGGER.info("第"+(i+1)+"输入參数 = "+o[i]);
				System.err.println("111111111111111");//測试是否进入切面
	  		}	  
	  		LOGGER.info("当前方法为 "
	                + pjp.getTarget().getClass().getName() + "."
	                + pjp.getSignature().getName()+"  运行时间为"+time+"ms");
	        return retVal;
	    }  

}

測试类

package function;

import java.io.IOException;

import org.junit.Test;
import com.model.User;
import com.service.UserService;
import com.util.BeanFactoryUtil;

public class MyAspectTest {
	
	@Test
	public void aopTest() throws IOException{
		
		UserService userservice=(UserService)BeanFactoryUtil.getInstance().getBean("userService");
		User user=userservice.getUserByUid(3);
		System.err.println(user.getName());
	}
}

output.log文件

[26 10:50:39,024 INFO ] [main] aop.MyAspect - 第1输入參数 = 3
[26 10:50:39,025 INFO ] [main] aop.MyAspect - 当前方法为 com.service.imp.UserServiceImpl.getUserByUid ?运行时间为277ms
张三

该日志文件记录了每一个方法的运行时间，利用AOP切面。