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validation for jsptextarea in bean class

srinivasraodumpala
on
Medium Priority
250 Views
Last Modified: 2010-04-01
I want write code for validation on server side in java
In jsp i have textarea in that i want enter the comments

Validation is --When number of characters are less than or equals to 3000

I am working in atg application server and atg dynamoframework i developed jsp and bean for properties. in jsp i have button,when i click the button it check the validation and submit the button it show the error message or alert message

Thanks
Srinivasrao
Comment
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Commented:
I'm not clear whether you want server side or client side validation.
I'm also not clear on whether number of characters greater than 3000 is a failure
or a success condition. I'll assume failure here.

Anyways, I'll give both of them.


<head>
<script type="text/javascript">
    function validateText()
    {
        var text = document.MyForm.Text.value;
        if(text.length > 3000)
        {
            alert('Text entered too long');
        }
    }
</script>
</head>

....
....

<form name="MyForm">
....
....
<textarea name="Text" rows="20" cols="60"></textarea>
<input type="button" value="Submit" onclick="javascript:validateText();">

</form>


Now, server side validation.


I don't know what you are using for Server Side coding. Servlets? Struts? what?
If it is servlets, you can do

String text = request.getParameter("Text");
if(text.length() > 3000)
{
    request.setAttribute("error", "Text too long");
}

// then forward to the same JSP you came from.

In your JSP, put something like this:

<%
    if(request.getAttribute("error") != null)
    {
%>
<b><font color="red"><%=request.getAttribute("error")%></font></b>
<%
    }
%>


________
radarsh

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