Log HTML formatter : Log Formatter « Log « Java Tutorial

import java.util.Date;
import java.util.logging.FileHandler;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogManager;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
import java.util.logging.XMLFormatter;

class HTMLFormatter extends java.util.logging.Formatter {
  public String format(LogRecord record) {
    return ("<tr><td>" + (new Date(record.getMillis())).toString() + "</td><td>"
        + record.getMessage() + "</td></tr>\n");
  }

  public String getHead(Handler h) {
    return ("<html>\n  <body>\n" + "<Table border>\n<tr><td>Time</td><td>Log Message</td></tr>\n");
  }

  public String getTail(Handler h) {
    return ("</table>\n</body>\n</html>");
  }
}

public class LoggingHTMLFormatter {
  public static void main(String args[]) throws Exception {
      LogManager lm = LogManager.getLogManager();
      Logger parentLogger, childLogger;
      FileHandler xml_handler = new FileHandler("log_output.xml");
      FileHandler html_handler = new FileHandler("log_output.html");
      parentLogger = Logger.getLogger("ParentLogger");
      childLogger = Logger.getLogger("ParentLogger.ChildLogger");

      lm.addLogger(parentLogger);

      lm.addLogger(childLogger);

      parentLogger.setLevel(Level.WARNING);
      childLogger.setLevel(Level.ALL);
      xml_handler.setFormatter(new XMLFormatter());
      html_handler.setFormatter(new HTMLFormatter());

      parentLogger.addHandler(xml_handler);
      childLogger.addHandler(html_handler);

      childLogger.log(Level.FINE, "This is a fine log message");
      childLogger.log(Level.SEVERE, "This is a severe log message");
      xml_handler.close();
      html_handler.close();
  }
}

35.4.Log Formatter
	35.4.1.	Set log Formatter
	35.4.2.	Create custom formatter
	35.4.3.	Define your own Custom Formatter
	35.4.4.	Log HTML formatter
	35.4.5.	Logger with XMLFormatter and FileHandler
	35.4.6.	XMLFormatter based Logging
	35.4.7.	Creating a Custom Formatter for a Logger Handler
	35.4.8.	Setting the Formatter of a Logger Handler