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。

youdao

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。

youdao

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。

youdao

WikiLeaks spent months converting the nearly 2 million NARA files from PDF documents to text files, correcting typographic errors and adding metadata to make the files more easily searchable.

FORBES: WikiLeaks' 'PLUS D' Aims To Digitize America's Secret Diplomatic History

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

FORBES: Magazine Article