hidden variable syntax not working in servlets

[puja shaw]

can anyone please run the above example and tell me why it isnt working.I found out that the problem is with the hidden variable syntax.If so ,please can anyone tell me the solution for the below program th work.

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class HiddenVariablesExample extends HttpServlet{

    public void service(HttpServletRequest request,HttpServletResponse response) throws IOException{

           PrintWriter out = response.getWriter();

           response.setContentType("text/html");

           out.println("<form action=\"/Hostel/hve2\">");
           
           out.println("<input type=\"text\" name=\"username\">");

           out.println("<input type=\"submit\" value=\"next\">");

           
      }
 }

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class HiddenVariaExample2 extends HttpServlet{

    public void service(HttpServletRequest request,HttpServletResponse  response) throws IOException{

           String xxx = request.getParameter("username");

           PrintWriter out = response.getWriter();

           out.println("the username:    "+xxx);

           response.setContentType("text/html");

           out.println("<form action=\"/Hostel/hve3\">");
           
           out.println("<input type=\"text\" name=\"place\">");

          // out.println("<input type=\"hidden\" name = \"username\" value=\"<%=request.getParameter(\"username\")%>\"/>");

           out.println("<input type=\"hidden\" name = \"dummy\" value=\"dummy\"/>");

           out.println("<input type=\"hidden\" name=\"usernamehidden\" value=\" <%=xxx%> \"/>");

           out.println("<input type=\"submit\" value=\"next\">");

           
      }
 }         

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import java.lang.*;



public class HiddenVariablesExample3 extends HttpServlet{

    public void service(HttpServletRequest req,HttpServletResponse res) throws IOException{


 
            PrintWriter out = res.getWriter();

           
           

           String theplace = req.getParameter("place");

           String user2 = req.getParameter("usernamehidden");

           String dummyvar = req.getParameter("dummy");

       

          

           out.println("username:    "+user2);

           out.println("place:    "+theplace);

           out.println("dummy var:  "+dummyvar);


   

           res.setContentType("text/html");

           
           out.println("<form action=\"/Hostel/hve\">");
          
           out.println("<h1>"+user2);

           out.println("<h4>"+"your place is:   "+theplace);

           out.println("<input type=\"submit\" value=\"Back\">");       

           
      }
 }         

- <web-app>
- <servlet>
  <servlet-name>hiddenone</servlet-name> 
  <servlet-class>HiddenVariablesExample</servlet-class> 
  </servlet>
- <servlet>
  <servlet-name>cookie</servlet-name> 
  <servlet-class>MyCookieExample</servlet-class> 
  </servlet>
- <servlet>
  <servlet-name>hiddentwo</servlet-name> 
  <servlet-class>HiddenVariaExample2</servlet-class> 
  </servlet>
- <servlet>
  <servlet-name>hidden3</servlet-name> 
  <servlet-class>HiddenVariablesExample3</servlet-class> 
  </servlet>
- <servlet-mapping>
  <servlet-name>hiddenone</servlet-name> 
  <url-pattern>/hve</url-pattern> 
  </servlet-mapping>
- <servlet-mapping>
  <servlet-name>hiddentwo</servlet-name> 
  <url-pattern>/hve2</url-pattern> 
  </servlet-mapping>
- <servlet-mapping>
  <servlet-name>hidden3</servlet-name> 
  <url-pattern>/hve3</url-pattern> 
  </servlet-mapping>
  </web-app>

[Seetharaman Venkatasamy]

Welcome to JavaRanch puja shaw.

I have applied code tag to your post to make more readable.

Coming to your question, yes as you smelled the problem is in hidden tag .
*scriptlet is for jsp not for servlet * . here scriptlet is not required. you can use variable directly as in

out.println("<input type=\"hidden\" name=\"usernamehidden\" value=\"" +xxx+" \"/>");

[William Brogden]

<servlet-class>MyCookieExample</servlet-class>

I do hope that is not your real web.xml - ALL classes used in a servlet or jsp MUST be in a package. The reason being that if no package is specified, the JVM looks for a class file in the "current" directory, something you have no control over in a server environment.

Bill

[Bear Bibeault]

Why are you emitting HTML from a servlet rather than using a JSP?

[puja shaw]

Yes i understand my mistake now.Thankyou very much for helping me.My program did work fine now.Thankyou for fixing it for me.

[puja shaw]

Yes Mr bill.Thankyou very much for your suggestion.I will keep this in mind and i will make sure that next time when i write servlets ,i will put them in a package.Thankyou.

[puja shaw]

Actually i havent yet started using jsp's.Right now i am practising servlets.Thats the reason i used static content in servlets.But i agree that this is not a good idea.