GET Method Working But POST is not

[Vihan Srivastava]

Below is my form in a jsp, which on submit calls a servlet submit.do, at the moment the servlet is using GET method and in servlet I am able to getParameters for both textarea and the hidden control, but when I make it to post, it returns null for both of the parameters, I have no idea why.

 <form name="form1" method="GET" action="/Ideas/submit.do">
                   <p class="style6">Process</p>
                    <p>To voice your idea </p>
                    <p class="style6">Get Going Then </p>
                    <p>Enter Your Idea in the Space Below </p>
                    <p>
                <input type="hidden" name="txtUsername" value="<%=s%>">
                    </p>
                    <p>
                     <textarea id="txtIdea" name="txtIdea" cols="50" rows="10"><%=ideaRefill%></textarea>
                 </p>
                    <div>
                        <input type="image" src="/Ideas/images/submit.bmp" width="70" height="25" name="Submit">
                    </div>
              </form>

Please help me with this, i am really puzzled with this


Vihan ...

[Vihan Srivastava]

My Servlet Code Is -

   
package submit;
 
import connection.GetConnection;
import java.io.*;
import java.net.*;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
 
import java.util.Date;
import javax.servlet.*;
import javax.servlet.http.*;
import mail.SendMail;
public class SubmitIdea extends HttpServlet {
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String idea=request.getParameter("txtIdea");
        String submitter=request.getParameter("txtUsername");
        
        out.println(idea+" and "+submitter);
        out.close();
    }
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }
 
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }
    
    public String getServletInfo() {
        return "Short description";
    }
}
 

For Get Method Values are printed but for Post its printing null and null.



Vihan ...

[Sagar Birari]

For Post method change your form tag as following
Use method="POST" then execute code

<form name="form1" method="POST" action="/Ideas/submit.do">

Regards

[Vihan Srivastava]

Thanks Sagar For the Reply,

Obviously i tried with POST only and it was not working, with GET its working.

I was debugging the problem just now and found an interesting behavior.

I modified servlet code and added RequestDispatcher at the end and forwarded the request to a JSP as -

    
protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        String idea=request.getParameter("txtIdea");
        String submitter=request.getParameter("txtUsername");
        
        out.println(idea+" and "+submitter);
        RequestDispatcher view=request.getRequestDispatcher("index.jsp");
        view.forward(request,response);
        out.close();
    }

(i have excluded the irrelevant code here)

Now when i ran the prog in debug mode, i saw that after request is dispatched to jsp the doPost is called again, and this process repeats exactly three times, and the most interesting part is that in second time i can see the parameters being returned properly but in the first and third it is not.

Do you have any idea why this is so?

Appreciate your co-operation

[Amit Ghorpade]

Hi Vihan Srivastava welcome to Javaranch

out.println(idea+" and "+submitter);
        RequestDispatcher view=request.getRequestDispatcher("index.jsp");
        view.forward(request,response);
        out.close();

Not a good programming practice to print to the output, forward and then close the stream.
If the forward works, then your POST is working, isn't it?