log4j簡單案例

    package log4j;


import org.apache.log4j.LogManager;  
import org.apache.log4j.Logger;  
import org.apache.log4j.PropertyConfigurator;  

public class Log4jG {  
// private static Logger log =Logger.getLogger(Log4jG.class);  
 private static Logger log=LogManager.getLogger(Log4jG.class.getName());  
 private static Logger log1=LogManager.getLogger("myTest1");  
 private static Logger log2=LogManager.getLogger("myTest2");  
 private static Logger log3=LogManager.getLogger("myTest3");  
 public static void main(String[] args){  

//  BasicConfigurator.configure();  
  PropertyConfigurator.configure("c:\\log4j.properties");  
  log.debug("debug message");  
  log.info("info message");  
  log.error("error message");  


  log1.debug("test1  debug");  
  log1.info("test1  info message");  
  log1.error("test1  error message");  

  log2.debug("test2  debug");  
  log2.info("test2  info message");  
  log2.error("test2  error message");  


  log3.debug("test3  debug");  
  log3.info("test3  info message");  
  log3.error("test3  error message");  

 }  
}  </pre>log4j.properties<pre class="brush:java; toolbar: true; auto-links: false;">    log4j.rootLogger=INFO,A  
log4j.appender.A=org.apache.log4j.FileAppender  
log4j.appender.A.file=c:/rootlog.txt  
log4j.appender.A.layout=org.apache.log4j.PatternLayout  

log4j.logger.myTest1= DEBUG, test1  
log4j.appender.test1=org.apache.log4j.FileAppender  
log4j.appender.test1.File=c:/test1.log  
log4j.appender.test1.layout=org.apache.log4j.PatternLayout  
log4j.appender.test1.layout.ConversionPattern=%d %p [%c] - %m%n  

　　  

log4j.logger.myTest2= DEBUG, test2  
log4j.appender.test2=org.apache.log4j.FileAppender  
log4j.appender.test2.File=c:/test2.log  
log4j.appender.test2.layout=org.apache.log4j.PatternLayout  
log4j.appender.test2.layout.ConversionPattern=%d %p [%c] - %m%n  



log4j.logger.myTest3= DEBUG, R  
log4j.appender.R=org.apache.log4j.RollingFileAppender   

log4j.appender.R.File= C:/rolling.log  

# Control the maximum log file size   

log4j.appender.R.MaxFileSize=2KB   

# Archive log files (one backup file here)   

log4j.appender.R.MaxBackupIndex=1   

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

log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n   </pre> <p><br />

log4j1.2.17：http://logging.apache.org/log4j/1.2/download.html</p>
log4j1.2.17  API：http://logging.apache.org/log4j/1.2/apidocs/