Logger without configure file : Log « Servlets « Java

Logger without configure file

//Log4j from Apache is required

import org.apache.log4j.Logger;
import org.apache.log4j.BasicConfigurator;

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

public class LoggerNconfig extends HttpServlet {

  private Logger log = null;

  public void init() {

    log = Logger.getRootLogger();


  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
    java.io.PrintWriter out = response.getWriter();
    out.println("<html><head><title>Servlet logging</title></head><body>");
    out.println("<h2>Hello from a Logger with no Config file</h2>");
    out.println("Your logger name is: " + log.getName() + "<br>");
    out.println("Your logger parent is: " + log.getParent().getName()
        + "<br>");

  } //end doGet

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

    doGet(request, response);


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