Eclipse新建Java工程,工程目录如下

 

1、下载log4j的Jar包,在Java工程下新建lib文件夹,将jar包拷贝到此文件夹,并将其加入到路径中,即:Jar包上右键——Build Path——Add to Build Path

 

2、src文件夹下新建log4j.properties文档,内容如下:

 

log4j.rootLogger=info, stdout, log, errorlog  
log4j.Logger=search,Test  
  
###Console ###  
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 =  %d{ABSOLUTE} [ %t ] [ %p ]:%L - %m%n  
  
### Log ###    
log4j.appender.log = org.apache.log4j.DailyRollingFileAppender  
log4j.appender.log.File = log/log.log  
log4j.appender.log.Append = true  
log4j.appender.log.Threshold = INFO  
log4j.appender.log.DatePattern='.'yyyy-MM-dd  
log4j.appender.log.layout = org.apache.log4j.PatternLayout  
log4j.appender.log.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t ] %m%n  
  
### Error ###  
log4j.appender.errorlog = org.apache.log4j.DailyRollingFileAppender  
log4j.appender.errorlog.File = log/errorlog.log 
log4j.appender.errorlog.Append = true  
log4j.appender.errorlog.Threshold = ERROR   
log4j.appender.errorlog.DatePattern='.'yyyy-MM-dd  
log4j.appender.errorlog.layout = org.apache.log4j.PatternLayout  
log4j.appender.errorlog.layout.ConversionPattern =%-d{yyyy-MM-dd HH:mm:ss} [ %t ] %m%n 

  

 3、Java工程中新建log文件夹,并建立log.log和errorlog.log两个文档,存放日志

 

 4、src文件夹下新建LogTest类,测试效果:

import org.apache.log4j.Logger;

public class LogTest {

	public static void main(String[] args) {
		
		Logger logger = Logger.getLogger(LogTest.class);
		
		logger.info("wangxiaodong");
		logger.error("this is error");
		
	}
}

  

 然后,可以看到log.log和errorlog.log文档中有日志了

 

 

 参考:

http://www.codeceo.com/article/log4j-usage.html

 

 posted on 2016-12-21 18:00  布鲁布鲁sky  阅读(211)  评论(0编辑  收藏  举报