You need to remove the line:
<% session.putValue("validate", validate); %>
--- Garry Fisher <[EMAIL PROTECTED]> wrote:
> Can anybody help me with the following problem?
>
> I have a JSP, which is the first page to be
> displayed; the JSP should create
> a ValidateBean Object.
>
> When the submit button is pressed the servlet
> FormValidate is called to do
> some validation processing. This mechanism all works
> ok but when I try to
> access the ValidateVBean object in the servlet I get
> a NULL POINTER
> EXCEPTION error because it cannot see the bean
> created in the JSP. I have
> checked that the JSP and server are accessing the
> same session and they are.
>
>
>
> JSP (Simplified).
>
> <html>
> <head>
>
> <%@page language="java" import="bean.ValidateBean"
> %>
> <jsp:useBean id="validate" class="bean.ValidateBean"
> scope="session"/>
>
> <FORM name="PersonalDetails"
> action=/servlet/FormValidate method=post>
>
> <% session.putValue("validate", validate); %>
>
> <table width="600" border="1" cellspacing="0"
> cellpadding="0"
> bgcolor="#FF9933" bordercolor="#333399"
> align="center">
> <tr>
> <td height="20" align="left"
> valign="middle" colspan="6"
> class="form"><font face="Arial," size="1"
> class="form">First
> Name </font></td>
> <td height="20" align="left"
> valign="top" colspan="9"
> class="form"><font face="Arial," size="1">
> <input type="text" name="firstname"
> size="30">
> </font></td>
> <td height="20" align="left"
> valign="left" colspan="6"
> class="form"><font face="Arial," size="1"
> class="form">
> <% if (validate.isFirstNameValid() == true)
> { %>
> First Name Must Be Entered
> <% } %>
>
> <tr>
> <td height="34" colspan="18"
> class="form">
> <div align="center"> <font size="1">
> <input type="submit" name="Submit"
> value="Submit">
> </font></div>
> </td>
> </tr>
> </table>
> </FORM>
> </HEAD>
> </HTML>
>
>
> Java Bean Class.
>
> package bean;
>
> public class ValidateBean {
>
> private boolean firstNameValid = true;
>
> public boolean isFirstNameValid() {
> return firstNameValid;
>
> }
>
> public boolean validateFirstName(String
> inpFirstName) {
> if (inpFirstName == " ") {
> firstNameValid = false;
> return false;
> }
> else {
> firstNameValid = true;
> return true;
> }
> }
> }
>
> Processing Servlet.
>
>
> package servlets;
>
> import java.io.*;
>
> import javax.servlet.*;
> import javax.servlet.http.*;
>
>
> public class FormValidate extends HttpServlet {
>
> bean.ValidateBean validateBean;
>
> public void doGet (HttpServletRequest req,
> HttpServletResponse res)
> throws ServletException, IOException
> {
> doPost(req, res);
> }
> public void doPost(HttpServletRequest req,
> HttpServletResponse res) throws
> ServletException, IOException {
>
> //
>
> try {
> HttpSession sess = req.getSession();
> System.out.println(sess.getId());
> validateBean =
> (bean.ValidateBean)sess.getValue("validate");
> if
>
(validateBean.validateFirstName(req.getParameter("firstname")))
> valid = true;
> else
> valid = false;
>
> --- Other Stuff --
>
>
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> body: "signoff JSP-INTEREST".
> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
>
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
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To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST".
Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
