You can use something this code, I think it's self explaining.
// Create a FormPanel and point it at a service.
final FormPanel form = new FormPanel();
form.setAction(GWT.getHostPageBaseURL() + YOUR_SERVLET_PATH_HERE);
// To upload a file with the form we need to set to multipart MIME
encoding and POST method.
form.setEncoding(FormPanel.ENCODING_MULTIPART);
form.setMethod(FormPanel.METHOD_POST);
// Create a panel to hold all of the form widgets.
panel = new VerticalPanel();
form.setWidget(panel);
// Create a FileUpload widget.
final FileUpload upload = new FileUpload();
upload.setName("file");
panel.add(upload);
[SOME OTHER CODE HERE IF YOU WANT]
// Add a submit button.
final Button btnSubmit = new Button("Upload package");
btnSubmit.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
if (upload.getFilename().length() == 0)
Window.alert("The file path must not be empty");
else {
form.submit();
}
}
});
panel.add(btnSubmit);
Le mardi 14 février 2012 03:59:31 UTC-5, kimi a écrit :
>
> hi there
> what's the best approach to handle a simple fileupload in gwt ?
> normally it would be a normal POST with File-Field, problem is that a post
> to a servlet will make the page "refresh", that means user will be redirect
> from current page. is there a lightweight-approach which doesnt require
> this ? possibly an iframe which contains the form ?
>
> thanx
>
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