Logging Servlet with log4j

  

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;
import org.apache.log4j.*;

public class LoggingServlet extends HttpServlet {
    private static Logger logger = Logger.getLogger(LoggingServlet.class);

    public void doPost(HttpServletRequest req, HttpServletResponse res)
                       throws IOException, ServletException
    {
        logger.info("invoked the LoggingServlet...");
        PrintWriter writer = res.getWriter();
        writer.println("Check your web server console...");
        writer.flush();
        writer.close();
    }
}

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29.	log4j.properties: set the appender FILE
30.	log4j.properties: set the appender ROLLING
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Logging Servlet with log4j : Log4j « Language Basics « Java

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