iText 为 PDF 封面中的占位符动态添加值

Question

我有以下封面。我需要为 Licensee、date 添加值，并用给定的另一个文本填写方框。如何使用 iText 完成此操作。感谢任何帮助。

Answer 1

首先，您需要创建一个表单，作为所有许可文件的模板。 Chapter 6 of "iText in Action" (a chapter that can be downloaded for free) explains how to create such a form using OpenOffice, but there are many alternative ways to do this. I created such a form using Adobe Acrobat: CertificateOfExcellence.pdf

的第 5.3.5 节

我突出显示了这些字段，以便您可以看到我添加它们的位置。有四个：

课程： 14pt Helvetica 中的课程名称，居中对齐
姓名:Helvetica学生姓名，左对齐
日期： Helvetica 课程日期，左对齐
课程说明： Helvetica 学生姓名，左对齐 multi-line 标志。

现在我可以轻松填写表格了（参见FillForm）：

public void manipulatePdf(String src, String dest) throws DocumentException, IOException {
    PdfReader reader = new PdfReader(src);
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
    AcroFields form = stamper.getAcroFields();
    form.setField("course", "Copying and Pasting from Whosebug");
    form.setField("name", "Some dude on Whosebug");
    form.setField("date", "April 10, 2016");
    form.setField("description",
        "In this course, people consistently ignore the existing documentation completely. "
        + "They are encouraged to do no effort whatsoever, but instead post their questions "
        + "on Whosebug. It would be a mistake to refer to people completing this course "
        + "as developers. A better designation for them would be copy/paste artist. "
        + "Only in very rare cases do these people know what they are actually doing. "
        + "Not a single student has ever learned anything substantial during this course.");
    stamper.setFormFlattening(true);
    stamper.close();
}

生成的 PDF 如下所示：certificate.pdf

如您所见，代码非常简单。对于那些花时间阅读文档的人来说，所有这些都有很好的记录。也许你也可以看看标题为 Interactive forms on the official web site.

的部分

iText 为 PDF 封面中的占位符动态添加值

iText Add values to placeholders in PDF cover page dynamically

java

pdf

pdf-generation

itext