感恩前辈,下面就进行记录:

1、新建一个java工程,如下:

import org.apache.log4j.Logger;

import org.apache.log4j.PropertyConfigurator;

import org.apache.log4j.chainsaw.Main;



public class Test {

private static Logger logger = Logger.getLogger(Main.class);  

    public static void main(String[] args) {

   

    PropertyConfigurator.configure("log4j.properties");  /*这个我试一试了,如不要,感觉日志不能打印出来,如果添加这个就能输出*/

      

       System.out.println("This is println message.");

       

        // 记录debug级别的信息  

        logger.debug("This is debug message.......");

        // 记录info级别的信息  

        logger.info("This is info message......");

        // 记录error级别的信息  

        logger.error("This is error message.....");

    }  


}


log4j.properties内容如下:

l### 设置###

log4j.rootLogger = debug,stdout,D,E


### 输出信息到控制抬 ###

log4j.appender.stdout = org.apache.log4j.ConsoleAppender

log4j.appender.stdout.Target = System.out

log4j.appender.stdout.layout = org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n


### 输出DEBUG 级别以上的日志到=E://logs/error.log ###

log4j.appender.D = org.apache.log4j.DailyRollingFileAppender

log4j.appender.D.File = E://logs//log.log

log4j.appender.D.Append = true

log4j.appender.D.Threshold = DEBUG 

log4j.appender.D.layout = org.apache.log4j.PatternLayout

log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n


### 输出ERROR 级别以上的日志到=E://logs/error.log ###

log4j.appender.E = org.apache.log4j.DailyRollingFileAppender

log4j.appender.E.File =E://logs//error.log 

log4j.appender.E.Append = true

log4j.appender.E.Threshold = ERROR 

log4j.appender.E.layout = org.apache.log4j.PatternLayout

log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n