Java tutorial
//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); } }