problem in custom tags

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roohbir - 18 Mar 2007 15:12 GMT

Hi,
I have a program in which I have a basic jsp page with a text field
and a submit button. The idea is that when a user enters his name and
hits the button it should take him to another page which displays
"Hello user".
I have made a JSP page but don't knwo how to connect it with the
servlet. The name of the servlet is MyOwnCustomTag. The servlet and
jsp page are displayed underneath:

<html><head><title>Registration Page</title></head>
<body>

<%@ taglib uri="/myOwnTLD" prefix="myowntag"%>

<form action="MyOwnCustomTag" method='post'>
<table>
<tr>
<td> Enter Name: </td>
<td><input type='text' size=15 name='name'
value='<myowntag:requestParameter property="name"/>'>
</td>
</tr>

</table>
</p>
<br>
<input type='submit' value='Submit'>
<input type='hidden' name='action' value='register-action'>
</form>

</body></html>

================================================================

import javax.servlet.ServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;

public class MyOwnCustomTag extends TagSupport {
private String property;

public void setProperty(String property) {
this.property = property;
}
public int doStartTag() throws JspException {
ServletRequest req = pageContext.getRequest();
String value = req.getParameter(property);

try {
pageContext.getOut().print("Hello " + value);
}
catch(java.io.IOException ex) {
throw new JspException(ex.getMessage());
}
return SKIP_BODY;
}
}
=========================================

Help would be really appreciated.
Ros

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Andrew Thompson - 18 Mar 2007 15:19 GMT

> Help would be really appreciated.

It might help to ask a question.

Andrew T.

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Joshua Cranmer - 18 Mar 2007 20:04 GMT

> ..
>> Help would be really appreciated.
>
> It might help to ask a question.
>
> Andrew T.

I think the problem is he doesn't know how to integrate the page with
the servlet, per paragraph 2.

Reply to this Message

Kai Schwebke - 18 Mar 2007 20:14 GMT

> I have made a JSP page but don't knwo how to connect it with the
> servlet. The name of the servlet is MyOwnCustomTag. The servlet and

...

> public class MyOwnCustomTag extends TagSupport {

...

You wrote a custom tag, not a servlet. The tag may be embedded in a
JSP called by your form page, but cannot be called directly.

A good book covering these topics is Falkner/Jones "Servlets and Java
Server Pages". It's free to download here:
http://www.theserverside.com/tt/books/addisonwesley/ServletsJSP/index.tss

Kai

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roohbir - 18 Mar 2007 20:42 GMT

> > I have made a JSP page but don't knwo how to connect it with the
> > servlet. The name of the servlet is MyOwnCustomTag. The servlet and
[quoted text clipped - 10 lines]
>
> Kai

Thanks a lot Kai and Joshua. Much appreciated.
Ros

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problem in custom tags

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