To account for text that would always differ between two PDF files, such as a date, you can provide a mask.

考虑到两个PDF文件之间可能存在一些文本上的差异，例如日期，您可以提供一个蒙版来忽略。

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The iText library contains classes to generate PDF text in various fonts, generate tables in PDF document, add watermarks to pages, and so on.

iText 库中的类用于以各种字体来生成 PDF 文本、在 PDF 文档中生成表格、为页添加水印等。

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PdfBoxHelperSuperClass: This helper super class has methods and constants that make it simple to create a PDF text verification point in a test script.

PdfBoxHelperSuperClass：该Helper超类拥有的方法和变量，可以使在文本脚本中创建PD f文本确认点变得容易。

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Even God.com--undoubtedly a hot piece of Web property--hosts only text and links to .pdf files.

FORBES: Magazine Article