Source Code : Log in ServletContext

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Log in ServletContext

 
// web.xml
/*
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
         http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
  <servlet>
    <servlet-name>LoggingServlet</servlet-name>
    <servlet-class>LoggingServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>LoggingServlet</servlet-name>
    <url-pattern>/loggingServlet</url-pattern>
  </servlet-mapping>
</web-app>
*/

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoggingServlet extends HttpServlet {
  private ServletContext context;

  public void init(ServletConfig config) throws ServletException {
    super.init(config);
    context = getServletContext();
    context.log("Init has been invoked");
  }

  public void doGet(HttpServletRequest req, HttpServletResponse res)
      throws IOException {
    ServletOutputStream out = res.getOutputStream();
    context.log("doGet has now been invoked");
    res.setContentType("text/html");
    out.println("<html><head><title>Logging Servlet</title></head>");
    out.println("<body>Visit the <tomcat-home>\logs and open the xx file to see the log entries");
    out.println("</body></html>");
  }
}

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