Source Code : Servlet: Root logger

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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("<html><head><title>Servlet logging</title></head><body>");
    out.println("<h2>Hello from a Logger with a log4j.properties file</h2>");
    out.println("Your logger name is: " + log.getName() + "<br>");
    out.println("</body></html>");

  }

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

    doGet(request, response);
  }
}

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