iText不设置复选框字段 [英] iText doesn't set checkbox field

问题描述

我正在使用iText库基于模板生成pdf文件.但是，当我尝试设置复选框字段时，它不会被填充. 班级在这里:

I'm using iText library to generate pdf file based on template. But when I try to set checkbox field it won't filled. Class is here:

public class MainClass {
    public static void main(String[] args) {
        try {
            PdfReader reader = new PdfReader("pdf/fw9_template.pdf");
            PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("test.pdf"));
            AcroFields form = stamper.getAcroFields();

            String states[] = form.getAppearanceStates("topmostSubform[0].Page1[0].FederalClassification[0].c1_1");
            System.out.println(states);


            for (Iterator i = form.getFields().keySet().iterator(); i.hasNext(); ) {
                String key = (String) i.next();
                System.out.print(key + " : ");
                switch(form.getFieldType(key)) {
                    case AcroFields.FIELD_TYPE_CHECKBOX:
                        System.out.println("Checkbox");
                        break;
                    case AcroFields.FIELD_TYPE_COMBO:
                        System.out.println("Combobox");
                        break;
                    case AcroFields.FIELD_TYPE_LIST:
                        System.out.println("List");
                        break;
                    case AcroFields.FIELD_TYPE_NONE:
                        System.out.println("None");
                        break;
                    case AcroFields.FIELD_TYPE_PUSHBUTTON:
                        System.out.println("Pushbutton");
                        break;
                    case AcroFields.FIELD_TYPE_RADIOBUTTON:
                        System.out.println("Radiobutton");
                        break;
                    case AcroFields.FIELD_TYPE_SIGNATURE:
                        System.out.println("Signature");
                        break;
                    case AcroFields.FIELD_TYPE_TEXT:
                        System.out.println("Text");
                        break;
                    default:
                        System.out.println("?");
                }
            }
            form.setField("topmostSubform[0].Page1[0].FederalClassification[0].c1_1[0]", "true");

            stamper.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

程序输出:

null
topmostSubform[0].Page1[0].EmployerID[0].f1_14[0] : Text
topmostSubform[0].Page1[0].FederalClassification[0].f1_4[0] : Text
topmostSubform[0].Page1[0].f1_9[0] : Text
topmostSubform[0].Page1[0].f1_10[0] : Text
topmostSubform[0].Page1[0].FederalClassification[0].c1_1[1] : Checkbox
topmostSubform[0].Page1[0].f1_2[0] : Text
topmostSubform[0].Page1[0].EmployerID[0].f1_15[0] : Text
topmostSubform[0].Page1[0].SSN[0].f1_12[0] : Text
topmostSubform[0].Page1[0].SSN[0].f1_13[0] : Text
topmostSubform[0].Page1[0].Address[0].f1_8[0] : Text
topmostSubform[0].Page1[0].Address[0].f1_7[0] : Text
topmostSubform[0].Page1[0].FederalClassification[0].c1_1[0] : Checkbox
topmostSubform[0].Page1[0].FederalClassification[0].c1_1[2] : Checkbox
topmostSubform[0].Page1[0].FederalClassification[0].c1_7[0] : Checkbox
topmostSubform[0].Page1[0].FederalClassification[0].c1_1[4] : Checkbox
topmostSubform[0].Page1[0].FederalClassification[0].c1_1[3] : Checkbox
topmostSubform[0].Page1[0].f1_1[0] : Text
topmostSubform[0].Page1[0].FederalClassification[0].c1_1[5] : Checkbox
topmostSubform[0].Page1[0].SSN[0].f1_11[0] : Text
topmostSubform[0].Page1[0].FederalClassification[0].f1_3[0] : Text
topmostSubform[0].Page1[0].Exemptions[0].f1_6[0] : Text
topmostSubform[0].Page1[0].Exemptions[0].f1_5[0] : Text

当我们看到输出中的复选框时，我不明白为什么getAppearanceStates()方法返回"null".另外，复选框不会填充结果pdf文件.

I don't understand why the method getAppearanceStates() returns 'null', when we can see checkboxes in the output. Also checkbox doesn't filled in a result pdf file.

有人可以帮助我解决此问题吗?

Can anybody help me to resolve this issue?

预先感谢， 谢尔盖

推荐答案

为什么这样做时status为什么是null?

Why does status turns out to be null when you do:

String states[] = form.getAppearanceStates(
    "topmostSubform[0].Page1[0].FederalClassification[0].c1_1");

您要提供自己的问题的答案:因为您的表单中没有名称为"topmostSubform[0].Page1[0].FederalClassification[0].c1_1"的字段.

You are providing the answer in your own question: because there is no field with name "topmostSubform[0].Page1[0].FederalClassification[0].c1_1" in your form.

使用以下行时，什么是states:

What is states when you use the following line:

String states[] = form.getAppearanceStates(
    "topmostSubform[0].Page1[0].FederalClassification[0].c1_1[1]");

这篇关于iText不设置复选框字段的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！