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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