如何使用 iText ZD52387880E22238179A 找到在 PDF Acrofield 中選擇的單選按鈕的索引 position

Question

PdfReader reader = new PdfReader(pdfbytes);
AcroFields acroFields = reader.getAcroFields();
Set <String> fields = acroFields.getFields().keySet();
for (String field:fields) {
    if (AcroFields.FIELD_TYPE_RADIOBUTTON == acroFields.getFieldType(field)) {
        String fieldId = acroFields.getField(field);
        List<AcroFields.FieldPosition> positions = acroFields.getFieldPostions(field);
        System.out.println("List size : " + positions.size());
        for (int i = 0; i < positions.size(); i++) {
            Rectangle rect = acroFields.getFieldPositions(field).get(i).position;
        }
    }
}

我能夠在無線電組下找到並迭代 position 的列表。

我想知道為了找到其絕對值 position 而選擇的單選按鈕的索引。

Answer 1

以下代碼應為您提供指導。 請注意，可能沒有選中單選按鈕。 您還必須進行錯誤處理等...

for (int i = 0; i < positions.size(); i++) {

    Item fieldItem = acroFields.getFieldItem(field);
    PdfDictionary dict = entry.getValue().getWidget(i);
    PdfName as = dict.getAsName(PdfName.AS);
    if(as==null){
      //handle/throw error if AS key is not set and there are one or more  subdictionaries!
    }
    String asValue = PdfName.decodeName(as.toString());
    if("Off".equalsIgnoreCase(asValue)){
       System.out.println("not checked");
    } 
    else{
       System.out.println("Checked");
       //do what you need to do
    }
}