The validate function can be implemented to validate your form input. If
you find erros, you can put those errors into an ActionErrors object and
then return them. The 'best practice' approach would probably be to have
your validation encapsulated in a 'utility bean' that you could instantiate
to make calls against (that's how I am doing mine anyway). However, for a
small project you could easily include all of you login right in validate.
There is a good example of doing this in the struts documentation, and I
believe the users guide covers the topic quite well too. If you haven't
already looked them over, you really should.
How to best use the validation mechanisms provided by struts is quite a
debated issue =)
No matter where/how you implement your logic to validate your form, you'll
want to create an ActionErrors instance and add ActionError instances to it,
and finally return the ActionErrors object. Very simply:
ActionErrors actionErrors = new ActionErrors();
... then, assuming they don't specify a file - and assuming it is a required
field.
actionErrors.add("File", new ActionError("error.file.required"));
and then at the end of your perform, don't forget to:
return actionErrors;
The text passed to the ActionError constructor ("error.file.required") needs
to be specified in your application resources file.
HTH,
Eddie
----- Original Message -----
From: "Henry Lu" <[EMAIL PROTECTED]>
To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
Sent: Thursday, February 21, 2002 12:58 PM
Subject: Re: <html:file> tag
> Thanks for your info! But I need a little bit more details:
>
> //int my FileForm.java file
> /////////////////////////////////////////////////////
> public class FileForm extends ActionForm
> {
> private String theFile;
>
> public FileForm() {}
>
> public void setTheFile(String file)
> {
> this.theFile = file;
> }
>
> public String getTheFile()
> {
> return this.theFile;
> }
>
> ...
>
> public ActionErrors validate(...)
> {
> ////////////////////////////////////
> // what should i do here?
> }
> }
>
> //////////////////////////////////////////////////////
> //int the jsp page:
> ////////////////////////////////////////////////////////
> <html:file property="theFile" accept="text" />
>
> Could you tell me what exactly to do and where to add code?
>
> Thank you very much!
>
>
> --------------------------------------------------------------------------
-
> Henry Lu
> MCIT phone: (734) 936-2063
> University of Michigan Medical Center fax: (734) 763-4372
>
> On Thu, 21 Feb 2002, SUPRIYA MISRA wrote:
>
> > In your validation function first store it.
> > Stringbuffer filecontent= file content.
> > request.setAttribute("file",filecontent);
> > On Jsp use equal tag to see if you have the content--take it else ask
for a
> > new one.
> >
> >
> > >From: Henry Lu <[EMAIL PROTECTED]>
> > >Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
> > >To: struts users <[EMAIL PROTECTED]>
> > >Subject: <html:file> tag
> > >Date: Thu, 21 Feb 2002 10:48:05 -0500 (EST)
> > >
> > >How do i retrieve the content of file in the formAction program? The
only
> > >thing I get from the tag is the file name (exa: 1.txt). How do I get
the
> > >content of the file?
> > >
> > >
> >
>---------------------------------------------------------------------------
> > >Henry Lu
> > >MCIT phone: (734) 936-2063
> > >University of Michigan Medical Center fax: (734) 763-4372
> > >
> > >
> > >--
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> > >
> >
> >
> >
> >
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