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log4j简单案例

  1. package log4j;
  2.  
  3. import org.apache.log4j.LogManager;
  4. import org.apache.log4j.Logger;
  5. import org.apache.log4j.PropertyConfigurator;
  6.  
  7. public class Log4jG {
  8. // private static Logger log =Logger.getLogger(Log4jG.class);
  9.  private static Logger log=LogManager.getLogger(Log4jG.class.getName());
  10.  private static Logger log1=LogManager.getLogger("myTest1");
  11.  private static Logger log2=LogManager.getLogger("myTest2");
  12.  private static Logger log3=LogManager.getLogger("myTest3");
  13.  public static void main(String[] args){
  14.  
  15. //  BasicConfigurator.configure();
  16.   PropertyConfigurator.configure("c:\\log4j.properties");
  17.   log.debug("debug message");
  18.   log.info("info message");
  19.   log.error("error message");
  20.  
  21.   
  22.   log1.debug("test1  debug");
  23.   log1.info("test1  info message");
  24.   log1.error("test1  error message");
  25.   
  26.   log2.debug("test2  debug");
  27.   log2.info("test2  info message");
  28.   log2.error("test2  error message");
  29.   
  30.   
  31.   log3.debug("test3  debug");
  32.   log3.info("test3  info message");
  33.   log3.error("test3  error message");
  34.  
  35.  }
  36. }
  37.  

log4j.properties 

  1. log4j.rootLogger=INFO,A
  2. log4j.appender.A=org.apache.log4j.FileAppender
  3. log4j.appender.A.file=c:/rootlog.txt
  4. log4j.appender.A.layout=org.apache.log4j.PatternLayout
  5.  
  6. log4j.logger.myTest1= DEBUG, test1
  7. log4j.appender.test1=org.apache.log4j.FileAppender
  8. log4j.appender.test1.File=c:/test1.log
  9. log4j.appender.test1.layout=org.apache.log4j.PatternLayout
  10. log4j.appender.test1.layout.ConversionPattern=%d %p [%c] - %m%n
  11.  
  12. 　　
  13.  
  14. log4j.logger.myTest2= DEBUG, test2
  15. log4j.appender.test2=org.apache.log4j.FileAppender
  16. log4j.appender.test2.File=c:/test2.log
  17. log4j.appender.test2.layout=org.apache.log4j.PatternLayout
  18. log4j.appender.test2.layout.ConversionPattern=%d %p [%c] - %m%n
  19.  
  20.  
  21.  
  22. log4j.logger.myTest3= DEBUG, R
  23. log4j.appender.R=org.apache.log4j.RollingFileAppender 
  24.  
  25. log4j.appender.R.File= C:/rolling.log
  26.  
  27. # Control the maximum log file size 
  28.  
  29. log4j.appender.R.MaxFileSize=2KB 
  30.  
  31. # Archive log files (one backup file here) 
  32.  
  33. log4j.appender.R.MaxBackupIndex=1 
  34.  
  35. log4j.appender.R.layout=org.apache.log4j.PatternLayout 
  36.  
  37. log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n 
  38.  

log4j1.2.17：http://logging.apache.org/log4j/1.2/download.html

log4j1.2.17  API：http://logging.apache.org/log4j/1.2/apidocs/

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