PDFBox 2 - 如何在展平前从表单字段中删除边框？

Question

我使用PDF文档作为模板，其中包含一个表单，在将值放入表单后，我想删除字段边框，然后展平表单。边框在编辑时很有用，但是当表格被渲染时它们很可怕＃34;我不能将边框的颜色更改为背景颜色，因为它不均匀。

Answer 1

PDAnnotationWidget widget = textBox.getWidgets().get(0); // only the first widget for simplicity
PDAppearanceCharacteristicsDictionary appearanceCharacteristics = widget.getAppearanceCharacteristics();
if (appearanceCharacteristics == null)
{
     // if it doesn't exist, create it
     appearanceCharacteristics = new PDAppearanceCharacteristicsDictionary(new COSDictionary());
}
appearanceCharacteristics.setBorderColour(new PDColor(new float[]{}, PDDeviceRGB.INSTANCE)); // empty array = invisible color
widget.setAppearanceCharacteristics(fieldAppearance);
acroForm.refreshAppearances(); // alternatively, set the value of the field