asked on

servlet example issue with method

I was trying following example getting error as inb attachment saying method wont suppoerted here.Any ideas, suggestions, sample code, links, source code highly appreciated. Thanks in advance

test.html

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>

<form action="AdminCheck" method="post">
Login ID <input type="text" value="user"/><br>
Password <input type="password" value="pass"/><br><br><br>
<input type="submit" value="OK"/><br>
</form>
</body>
</html>

AdminCheck.java

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class AdminCheck extends HttpServlet {

      protected void processRequest(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
            response.setContentType("text/html;charset=UTF-8");
            PrintWriter out = response.getWriter();

            String a=request.getParameter("user");//Username for my JSP page
            String b=request.getParameter("pass");//Password for a JSP page

            try {

                  out.println("<html>");
                  out.println("<head>");
                  out.println("<title>Servlet admincheck</title>");
                  out.println("</head>");
                  out.println("<body>");
                  if(a.equals("admin")&& b.equals("check"))
                        out.println("Enter successfully");
                  else
                        out.println("wrong");
                  out.println("<h1>Servlet admincheck at " + request.getContextPath () + "</h1>");
                  out.println("</body>");
                  out.println("</html>");

            } finally {
                  out.close();
            }
}
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" id="WebApp_ID" version="2.4">
<servlet>
<servlet-name>Admin</servlet-name>
<servlet-class>AdminCheck</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Admin</servlet-name>
<url-pattern>/AdminCheck</url-pattern>
</servlet-mapping>

</web-app>

ServCR.JPG

ASKER CERTIFIED SOLUTION

CEHJ

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gudii9

ASKER

I changed the servlet as below

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class AdminCheck extends HttpServlet {
      protected void doPost(HttpServletRequest req, HttpServletResponse res)
      throws ServletException, IOException {


      }
      protected void processRequest(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
            response.setContentType("text/html;charset=UTF-8");
            PrintWriter out = response.getWriter();

            String a=request.getParameter("user");//Username for my JSP page
            String b=request.getParameter("pass");//Password for a JSP page

            try {

                  out.println("<html>");
                  out.println("<head>");
                  out.println("<title>Servlet admincheck</title>");
                  out.println("</head>");
                  out.println("<body>");
                  if(a.equals("admin")&& b.equals("check"))
                        out.println("Enter successfully");
                  else
                        out.println("wrong");
                  out.println("<h1>Servlet admincheck at " + request.getContextPath () + "</h1>");
                  out.println("</body>");
                  out.println("</html>");

            } finally {
                  out.close();
            }
}
}

Now HTML leading to servlet but showing empty servlet .

How can I call processRequest method from doPost() method. Please advise
EmptySErvlet.JPG

gudii9

ASKER

I changed as

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class AdminCheck extends HttpServlet {
      protected void doPost(HttpServletRequest req, HttpServletResponse res)
      throws ServletException, IOException {
            processRequest(req, res);
            /*PrintWriter pw = res.getWriter();
            pw.println("<hr/>");
            pw.println("Thank You for Shopping at BuyForLess.com. Please Visiting again. Hava a nice day!");*/
      }
      protected void processRequest(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
            response.setContentType("text/html;charset=UTF-8");
            PrintWriter out = response.getWriter();

            String a=request.getParameter("user");//Username for my JSP page
            String b=request.getParameter("pass");//Password for a JSP page

            try {

                  out.println("<html>");
                  out.println("<head>");
                  out.println("<title>Servlet admincheck</title>");
                  out.println("</head>");
                  out.println("<body>");
                  if(a.equals("admin")&& b.equals("check"))
                        out.println("Enter successfully");
                  else
                        out.println("wrong");
                  out.println("<h1>Servlet admincheck at " + request.getContextPath () + "</h1>");
                  out.println("</body>");
                  out.println("</html>");

            } finally {
                  out.close();
            }
}
}

but still coming empty servlet. PLEase advise

gudii9

ASKER

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class AdminCheck extends HttpServlet {
      /*protected void doPost(HttpServletRequest req, HttpServletResponse res)
      throws ServletException, IOException {
            processRequest(req, res);
            PrintWriter pw = res.getWriter();
            pw.println("<hr/>");
            pw.println("Thank You for Shopping at BuyForLess.com. Please Visiting again. Hava a nice day!");
      }*/
      protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
            response.setContentType("text/html;charset=UTF-8");
            PrintWriter out = response.getWriter();

            String a=request.getParameter("user");//Username for my JSP page
            String b=request.getParameter("pass");//Password for a JSP page

            try {

                  out.println("<html>");
                  out.println("<head>");
                  out.println("<title>Servlet admincheck</title>");
                  out.println("</head>");
                  out.println("<body>");
                  if(a.equals("admin")&& b.equals("check"))
                        out.println("Enter successfully");
                  else
                        out.println("wrong");
                  out.println("<h1>Servlet admincheck at " + request.getContextPath () + "</h1>");
                  out.println("</body>");
                  out.println("</html>");

            } finally {
                  out.close();
            }
}
}

Above also did not work throowing blank servlet page. Please advise

CEHJ

What did the log file say?

gudii9

ASKER

I do not know the location of the log. What would be default tomcat log folder location. I searched on *.log files and found many entries. Please advise

gudii9

ASKER

I checked following folder

C:\softwares gp\apache-tomcat-7.0.29\apache-tomcat-7.0.29\logs

which is empty. Please advise

CEHJ

If it's absolutely empty that's possibly not the Tomcat you're using

gudii9

ASKER

How do I find the log folder relating to my tomat. Is there is a way i can see properties of server and find. Please advise

CEHJ

You need to look at the docs for your version of Tomcat

gudii9

ASKER

>>docs for your version of Tomcat

Where can I find them. How to access them. Please advise

gudii9

ASKER

>>docs for your version of Tomcat

Where can I find them. How to access them. Please advise