从servlet向gwt中的formpanel发送响应

我正在从gwt客户端程序和设置调用servlet

final FormPanel form = new FormPanel();
form.setMethod(FormPanel.METHOD_POST);
form.setEncoding(FormPanel.ENCODING_MULTIPART);
form.setAction(GWT.getModuleBaseURL()+"/uploadservlet2");

现在提交完成后，我想在这个事件中从servlet中检索一个参数

 form.addFormHandler(new FormHandler() {
      public void onSubmit(FormSubmitEvent event) {
        // This event is fired just before the form is submitted. We can take
        // this opportunity to perform validation.
                RootPanel.get().add(new Label("On submit"));
      }

      public void onSubmitComplete(FormSubmitCompleteEvent event) {
**///I want parameter here**
                RootPanel.get().add(new Label("On submiting complete"));
      }
    });

---

请告诉我怎么做。

在您的onSubmitComplete中：

public void onSubmitComplete(FormSubmitCompleteEvent event) {
String serverResponse = event.getResults();

}

您可以让服务器返回HTML并将其放入HTML小部件中，或者让服务器返回som JSON并在GWT中解析它