Pdftk 是一个简单的命令行工具，用来进行日常的 PDF 文档处理，包括合并、拆分和加密、增加水印、解析PDF元数据、压缩和解压、修复受损的PDF文档等功能。具体说明如下：    <br />    <ul>     <li> <p>Merge PDF Documents</p> </li>     <li> <p>Split PDF Pages into a New Document</p> </li>     <li> <p>Rotate PDF Pages or Documents</p> </li>     <li> <p>Decrypt Input as Necessary (Password Required)</p> </li>     <li> <p>Encrypt Output as Desired</p> </li>     <li> <p>Fill PDF Forms with FDF Data or XFDF Data and/or Flatten Forms</p> </li>     <li> <p>Apply a Background Watermark or a Foreground Stamp</p> </li>     <li> <p>Report on PDF Metrics such as Metadata, Bookmarks, and Page Labels</p> </li>     <li> <p>Update PDF Metadata</p> </li>     <li> <p>Attach Files to PDF Pages or the PDF Document</p> </li>     <li> <p>Unpack PDF Attachments</p> </li>     <li> <p>Burst a PDF Document into Single Pages</p> </li>     <li> <p>Uncompress and Re-Compress Page Streams</p> </li>     <li> <p>Repair Corrupted PDF (Where Possible)</p> </li>    </ul>    <br />    <p><strong>项目主页：</strong><a href="http://www.open-open.com/lib/view/home/1326791190952" target="_blank">http://www.open-open.com/lib/view/home/1326791190952</a></p>