How to get data from JSP page to servlet

StackOverflow https://stackoverflow.com/questions/19405757

Question

I'm new to Servlet functionality. I'm trying to get some data in JSP Form and trying to print it in console using Servlet. But i'm not able to do that.

web.xml

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

  <servlet>
    <servlet-name>controlServlet</servlet-name>
    <servlet-class>com.selenium8x8.servlet.ControlServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>controlServlet</servlet-name>
    <url-pattern>/*</url-pattern>
  </servlet-mapping>
</web-app>

Startup.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
 <form action="Startup" method="post">
        <input type="text" name="name"/><br>        
        <input type="text" name="group"/>
        <input type="text" name="pass"/>
        <input type="submit" value="submit">            
    </form>

</body>
</html>

ControlServlet.java

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ControlServlet extends HttpServlet {

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String name = request.getParameter("name");
        String group = request.getParameter("group");
        String pass = request.getParameter("pass");
        System.out.println("Name :"+ name);
        System.out.println("group :"+ group);
        System.out.println("pass :"+ pass);
    }

}

After execution, it throws me the following error,

HTTP Status 405 - HTTP method GET is not supported by this URL

type Status report

message HTTP method GET is not supported by this URL

description The specified HTTP method is not allowed for the requested resource.
Was it helpful?

Solution

@Prassana:Please modify your web.xml as below and it should work. I tested your code and its working for me. This will work for both GET and POST.

<servlet>
<servlet-name>ControlServlet</servlet-name>
<servlet-class>com.selenium8x8.servlet.ControlServlet</servlet-class>
  </servlet>

  <servlet-mapping>
<servlet-name>ControlServlet</servlet-name>
<url-pattern>/Startup</url-pattern>
  </servlet-mapping>
</web-app>

OTHER TIPS

Change mapping 

<form action="/Startup" method="post">

Step2 : add ovveride annotation

  @Override
  public  void doPost(HttpServletReques...

It is unable to detect your post method and trying to hit get method I guess.

And try to check with get method also once,

@Override
  public void doGet(HttpServletReques...

Need to change action in form tag with following

 <form action="/Startup" method="post">

replace this : <form action="Startup"

by this : <form action="/Startup"

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