添加图片中的iText到acrofield？(Add image to acrofield in i

我试图填补PDF使用acrofields，我能够完美地添加字符串数据，但在将图像添加到acrofields有问题。 这是我添加字符串数据代码..

    File f = new File("F:/Test/Agreement.pdf");
    InputStream sourceTemplatePDFUrlStream = new BufferedInputStream(new FileInputStream(f));
    File destinationFile = new File("F:/Test/ag1.pdf");

    PdfReader reader = new PdfReader(sourceTemplatePDFUrlStream);
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(
            destinationFile));

    AcroFields form = stamper.getAcroFields();
    Image img = Image.getInstance("E:/signature/signature.png");
    Set fields = form.getFields().keySet();

    Hashtable val = new Hashtable();
    val.put("name", "xxx" );
    val.put("city_street_zip", "xxx"+"                    "+"xxx"+"                "+"xxx");
    val.put("chck_1", "Yes" );
    val.put("chck_2", "No");
    val.put("chck_3", "Yes" );
    val.put("street_address", "xxx" );
    val.put("account_num", "1234");



    Enumeration enumeration = val.keys();

    // iterate through Hashtable val keys Enumeration
    while (enumeration.hasMoreElements()) {
        String nextElement = (String) enumeration.nextElement();
        String nextElementValue = (String) val.get(nextElement);
        //System.out.println(nextElement + ":=================fillData===================:" + nextElementValue);
        form.setField(nextElement, nextElementValue);
    }

    //Form flattening makes the form non-editable and saveable with the 
    //form val filled in
    stamper.setFormFlattening(true);

    stamper.close();

Answer 1:

“官方”的方式做到这一点，是有一个按钮字段作为占位符图像，并在描述取代了按钮的“图标” 我的书 ：

PushbuttonField ad = form.getNewPushbuttonFromField(imageFieldName);
ad.setLayout(PushbuttonField.LAYOUT_ICON_ONLY);
ad.setProportionalIcon(true);
ad.setImage(Image.getInstance("E:/signature/signature.png"));
form.replacePushbuttonField("advertisement", ad.getField());

见ReplaceIcon.java为完整的代码示例。

免责声明：我iText的原开发商和的“的iText在行动”的作者的书籍。

Answer 2:

下面的解决方案工作：

public static void addImage(PdfStamper stamper,AcroFields form,String field,String fieldValue){
    try{
        System.out.println("Field "+field);
    java.util.List<AcroFields.FieldPosition> photograph = form.getFieldPositions(field);
    if(photograph!=null && photograph.size()>0){
    Rectangle rect= photograph.get(0).position;
    //if(StringUtils.isNotBlank(fieldValue)){
    Image img = Image.getInstance(fieldValue);
    img.scaleToFit(rect.getWidth(), rect.getHeight());
    img.setBorder(2);
    img.setAbsolutePosition(
    photograph.get(0).position.getLeft() + (rect.getWidth() - img.getScaledWidth() )
    , photograph.get(0).position.getTop() - (rect.getHeight()));
    PdfContentByte cb = stamper.getOverContent((int)photograph.get(0).page);
    cb.addImage(img);
    //}
    }
    }catch(Exception e){
        e.printStackTrace();
    }
    }

调用上述方法：

addImage(stamper, form, "CustomerSign", "E:/signature/signature.png");

其中CustomerSign是AcroField

Answer 3:

你可以尝试用你的代码添加此添加图片

PdfContentByte content = stamper.getOverContent(reader.getNumberOfPages());
Image image = Image.getInstance(new URL("E:/signature/signature.png"));
image.setAbsolutePosition(450,650);
image.scaleAbsolute(200,200);
content.addImage(image);
reader.close();
return output.toByteArray();

文章来源: Add image to acrofield in iText?