Blank result for jsp_servlet in Eclipse

Unni · #1 (**permalink**) 07-06-2007, 04:07 PM

Hello all,

Greetings!!!

I am new to this forum and also to Eclipse..

Have created index.jsp under WebContent in Eclipse. Having firstname and surname text boxes with submit button. Contents look like :

Code:

<form action="GreetingServlet" method="POST">
        First Name: <input type="text" name="firstName" size="20"><br>
        Surname: <input type="text" name="surname" size="20">
        <br><br>
        <input type="submit" value="Submit">

and created GreetingServlet by right clicking ProjectName(HelloServlets) -> New -> Projects -> Servlet
Contents look like:

Code:

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        String firstName = request.getParameter("firstName").toString();
        String surname = request.getParameter("surname").toString();

    	}

The problem is that, variables out,firstName,surname are underlined with yellow line in Eclipse's default browser . and when i keep the cursor on that variables then it displays warning message like "The local variable is never read".

SO i guess no contact between jsp and servlet files.. but when i submit the page is directing to http://localhost:8080/HelloServlets/GreetingServlet

but its blank .. Pls Help to execute this program correctly in Eclipse

Thanks in advance

Regards
Unni

Albert · #2 (**permalink**) 07-08-2007, 11:34 PM

The warning appears because you don't write the lines to print the first name and surname.

Code:

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        
        out.println("<title>Example</title>" +
        "<body bgcolor=FFFFFF>");

        out.println("<h2>Button Clicked</h2>");
     
        String firstName = request.getParameter("firstName").toString();
        String surname = request.getParameter("surname").toString();
        
        if(firstName != null){
            out.println(firstName);
          } else {
            out.println("No text entered.");
          }
        
        if(surname != null){
            out.println(firstName);
          } else {
            out.println("No text entered.");
          }
    	}

Unni · #3 (**permalink**) 07-12-2007, 05:30 AM

Thank you so much Albert

I could run and got the answer.. Thanks for ur immediate reply.. I couldnt reply early since i went to my native..

and am expecting more from u.. nice to meet u..

Once again Thanks!!

Regards
Juni