RE: [cinjug-users] newbie trying to learn m-v-c

[sdgesa gaeharth <pollux1234567890@xxxxxxxxx>]

Ah, I see. That works. However my original question is
to pass an object back to the jsp page. The
HttpServlet looks like this:

**********BEGIN SERVLET********
                MemberValidateForm formToValidate = new
MemberValidateForm();
                allOk =
formToValidate.validate(firstName,lastName,emailAddress,homePhone);
                if(allOk){
                        toPage = "/MemberAdd";
                }else{
                        req.setAttribute("formToValidate",formToValidate);
                }
                RequestDispatcher dispatcher;
                dispatcher = context.getRequestDispatcher(toPage);
                dispatcher.forward(req, res);

**********END SERVLET********

the jsp page looks like this:

**********BEGIN JSP********
<%@ taglib prefix="c"
uri="http://java.sun.com/jstl/core"%>
<%@ page import="java.util.*,
com.bdi.www.members.MemberValidateForm" %>
<%
MemberValidateForm doThis= (MemberValidateForm)
request.getAttribute("formToValidate");
out.println(doThis.getFirstName());
%>
**********END JSP********


MemberValidateForm looks like this:


**********BEGIN MemberValidateForm********

import java.util.*;

public class MemberValidateForm {

  private String firstName;
  private String lastName;
  private String emailAddress;
  private String homePhone;
  private Hashtable errors;

  public boolean validate(String firstName,String
lastName,String emailAddress,String homePhone) {
    boolean allOk=true;
    if (firstName.equals("")) {
      errors.put("firstName","Please enter your first
name");
      firstName="";
      allOk=false;
    }
    if (lastName.equals("")) {
      errors.put("lastName","Please enter your last
name");
      lastName="";
      allOk=false;
    }
    if (emailAddress.equals("") ||
(emailAddress.indexOf('@') == -1)) {
      errors.put("emailAddress","Please enter a valid
email address");
      emailAddress="";
      allOk=false;
    }
    if (homePhone.equals("")) {
      errors.put("homePhone","Please enter a valid
home phone number");
      homePhone="";
      allOk=false;
    }
    return allOk;
  }

  public String getErrorMsg(String s) {
    String errorMsg =(String)errors.get(s.trim());
    return (errorMsg == null) ? "":errorMsg;
  }

  public MemberValidateForm() {
    firstName="";
    lastName="";
    emailAddress="";
        homePhone="";
    errors = new Hashtable();
  }

  public String getFirstName() {
    return firstName;
  }

  public String getLastName() {
    return lastName;
  }

  public String getEmailAddress() {
    return emailAddress;
  }

  public String getHomePhone() {
    return homePhone;
  }

  public void setFirstName(String fname) {
    firstName =fname;
  }

  public void setLastName(String lname) {
    lastName =lname;
  }

  public void setEmailAddress(String eml) {
    emailAddress=eml;
  }

  public void setHomePhone(String hp) {
    homePhone=hp;
  }

  public void setErrors(String key, String msg) {
    errors.put(key,msg);
  }

}
**********END MemberValidateForm********


thanks

--- "Jeykumar, Nattamai S. (LNG-DAY)"
<nattamai.jeykumar@xxxxxxxxxxxxxx> wrote:

> Try the following...
> 
> 
> Typecast the object returned by
> request.getAttribute("toPage");
> 
> String tttt = (String)
> request.getAttribute("toPage");
> 
> 
> 
> Thanks,
> Jey Kumar
> 
> 
> 
> -----Original Message-----
> From: sdgesa gaeharth
> [mailto:pollux1234567890@xxxxxxxxx]
> Sent: Wednesday, September 08, 2004 3:10 PM
> To: Ted Tollefson
> Cc: users@xxxxxxxxxx
> Subject: RE: [cinjug-users] newbie trying to learn
> m-v-c
> 
> 
> For some reason I still get this error. I know its
> something i am doing wrong that is really stupid!!!
> I
> just cant figure
> 
> ******************
> incompatible types
> found   : java.lang.Object
> required: java.lang.String
> String tttt = request.getAttribute("toPage");
> ******************
> 
> thanks again
> 
> 
> 
> --- Ted Tollefson <ttollefson@xxxxxxxxxxxxxxxxxxxxx>
> wrote:
> 
> > my bad.  It should be
> >  
> > request.getAttribute("...
> >  
> > not request.getParameter
> > 
> > ________________________________
> > 
> > From: sdgesa gaeharth
> > [mailto:pollux1234567890@xxxxxxxxx]
> > Sent: Wed 9/8/2004 11:49 AM
> > To: users@xxxxxxxxxx
> > Subject: RE: [cinjug-users] newbie trying to learn
> > m-v-c
> > 
> > 
> > 
> > Thanks for the reply.I tried your code and i got
> an
> > error saying "cannot resolve symbol(get), so i
> > changd
> > it to:request.getParameter. Now I get this error
> > message when trying your code:
> > 
> > inconvertible types
> > found   : java.lang.String
> > required: com.bdi.www.members.MemberValidateForm
> >  MemberValidateForm formToValidate =
> >
>
(MemberValidateForm)request.getParameter("formToValidate");
> > 
> > thanks again
> > 
> > 
> > 
> > 
> > --- Ted Tollefson
> <ttollefson@xxxxxxxxxxxxxxxxxxxxx>
> > wrote:
> > 
> > > In your JSP, you can call this:
> > > 
> > > <%
> > > 
> > >  MemberValidateForm formToValidate =
> > > (MemberValidateForm)
> > request.get("formToValidate");
> > >
> > >
> >
>
out.println(formToValidate.getErrorMsg("firstName"));
> > > 
> > > %>
> > >
> > >
> > > ________________________________
> > >
> > > From: sdgesa gaeharth
> > > [mailto:pollux1234567890@xxxxxxxxx]
> > > Sent: Tue 9/7/2004 7:43 PM
> > > To: users@xxxxxxxxxx
> > > Subject: [cinjug-users] newbie trying to learn
> > m-v-c
> > >
> > >
> > >
> > > hello,
> > >
> > > as you can see i have a simple app here. How can
> i
> > > get
> > > the error msgs and form values to show up when
> the
> > > servlet detects a form validation error?
> > >
> > > I can do a System.out.println in
> > MemberSerlvet.java
> > > (below) and see the proper error message. But i
> > cant
> > > get it passed to the jsp page properly.
> > >
> > > please help!
> > >
> > >
> > > MemberValidateForm formToValidate = new
> > > MemberValidateForm();
> > >                 allOk =
> > >
> >
>
formToValidate.validate(firstName,lastName,emailAddress,homePhone);
> > >
> >
>
System.out.println(formToValidate.getErrorMsg("firstName");
> > >                 if(allOk){
> > >                         toPage = "/MemberAdd";
> > >                 }
> > >               
> > >
> req.setAttribute("formToValidate",formToValidate);
> > >
> > >
> > >               
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