java code for Servlet: Root logger

//Log4j from Apache is required

import org.apache.log4j.Logger;

import javax.servlet.*;
import javax.servlet.http.*;

public class LoggerWconfig extends HttpServlet {

private Logger log = null;

public void init() {

log = Logger.getRootLogger();

log.info("LoggerWconfig started.");
}

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {

//display a DEBUG level message
log.debug("Sending a DEBUG message");

// display an INFO level message
log.info("Sending an INFO message");

//better display some HTML
response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter();
out.println("");
out.println("

Hello from a Logger with a log4j.properties file

");
out.println("Your logger name is: " + log.getName() + "
");
out.println("");

}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {

doGet(request, response);
}
}