Configure Log4J Programmatically for Stand-Alone Applications

Configure Log4J Programmatically for Stand-Alone Applications

Code Example

import org.apache.log4j.*;

import java.io.IOException;

public class LogTest {

  private static final Logger log = Logger.getLogger(LogTest.class);
  public static void main(String args[]) {
   //BasicConfigurator.configure();
   Logger rootLogger = Logger.getRootLogger();
   rootLogger.setLevel(Level.INFO);
   PatternLayout layout = new PatternLayout(PatternLayout.TTCC_CONVERSION_PATTERN);
   rootLogger.addAppender(new ConsoleAppender(layout));
   try {
        RollingFileAppender rfa = new RollingFileAppender(layout, "logtest.log");
        rfa.setMaximumFileSize(1000000);
        rootLogger.addAppender(rfa);

   } catch (IOException e) {
   // e.printStackTrace();
   }   log.info("Testing...");
  }

}

Another possible PatternLayout to use for more readable format would be:

PatternLayout layout = new PatternLayout("%d{ISO8601} [%t] %-5p %c %x - %m%n");

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Name	Date	Comment
	Programmer 05/09/2011 9:58 am	Great Article. Thanks for sharing