JSpinner的输入限制实现
最近使用了JSpinner，需要限制其中数字部分。

final SpinnerModel model = new SpinnerNumberModel(minNumber, minNumber, maxNumber, 1);
        numberSpinner = new JSpinner(model);
        // 允许输入
        final JSpinner.NumberEditor editor = new JSpinner.NumberEditor(numberSpinner, "0");
        numberSpinner.setEditor(editor);
        final JFormattedTextField textField = ((JSpinner.NumberEditor)numberSpinner.getEditor()).getTextField();
        textField.setEditable(true);//开启输入功能
        // 开启输入的值的限制
        final DefaultFormatterFactory factory = (DefaultFormatterFactory)textField.getFormatterFactory();
        final NumberFormatter formatter = (NumberFormatter)factory.getDefaultFormatter();
        formatter.setAllowsInvalid(false);// 此处对输入的有效性进行控制。若改为true，则不控制有效性