Eclipse 4.5（Mars）中的JFace 3.11版添加了一个noDefaultButton()方法，该方法仅关闭“恢复默认值”按钮。
在较早的版本中，您可以调用noDefaultAndApplyButton()来取消默认按钮，并覆盖contributeButtons方法来添加您自己的Apply按钮-您将必须自己处理此按钮。
类似于：

@Override
  protected void contributeButtons(final Composite parent)
  {
    final Button applyButton = new Button(parent, SWT.PUSH);
    applyButton.setText("Apply");

    final int widthHint = convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH);
    final GridData data = new GridData(SWT.FILL, SWT.CENTER, false, false);
    final Point minButtonSize = applyButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
    data.widthHint = Math.max(widthHint, minButtonSize.x);
    applyButton.setLayoutData(data);

    applyButton.addSelectionListener(new SelectionAdapter() {
      @Override
      public void widgetSelected(final SelectionEvent e) {
        performApply();
      }
    });

    final GridLayout layout = (GridLayout)parent.getLayout();
    layout.numColumns++;
  }