apt-get install xpdf

root@raspberrypi:/var/www# pdftotext
pdftotext version 0.26.5
Copyright 2005-2014 The Poppler Developers - http://poppler.freedesktop.org
Copyright 1996-2011 Glyph & Cog, LLC
Usage: pdftotext [options] <PDF-file> [<text-file>]
 -f <int>   : first page to convert
 -l <int>   : last page to convert
 -r <fp>   : resolution, in DPI (default is 72)
 -x <int>   : x-coordinate of the crop area top left corner
 -y <int>   : y-coordinate of the crop area top left corner
 -W <int>   : width of crop area in pixels (default is 0)
 -H <int>   : height of crop area in pixels (default is 0)
 -layout   : maintain original physical layout
 -fixed <fp>  : assume fixed-pitch (or tabular) text
 -raw    : keep strings in content stream order
 -htmlmeta   : generate a simple HTML file, including the meta information
 -enc <string>  : output text encoding name
 -listenc   : list available encodings
 -eol <string>  : output end-of-line convention (unix, dos, or mac)
 -nopgbrk   : don't insert page breaks between pages
 -bbox    : output bounding box for each word and page size to html. Sets -htmlmeta
 -opw <string>  : owner password (for encrypted files)
 -upw <string>  : user password (for encrypted files)
 -q    : don't print any messages or errors
 -v    : print copyright and version info
 -h    : print usage information
 -help    : print usage information
 --help   : print usage information
 -"htmlcode">

root@raspberrypi:/var/www# pdftotext onceai.pdf onceai.txt
root@raspberrypi:/var/www# cat onceai.txt 产品介绍 顽石智能科技（上海）有限公司
....


然后在node.js中使用 child_process直接调用此命令即可，pdftotext会将内容输出以文本文件中，可能需要多一些操作。具体代码略。
用antiword提取 .doc 的内容
我们这里使用了 antiword 开源软件，来提取word2003以前版本的内容，安装同样非常简单：


apt-get install antiword


查看帮助：




root@raspberrypi:/var/www# antiword
 Name: antiword
 Purpose: Display MS-Word files
 Author: (C) 1998-2005 Adri van Os
 Version: 0.37 (21 Oct 2005)
 Status: GNU General Public License
 Usage: antiword [switches] wordfile1 [wordfile2 ...]
 Switches: [-f|-t|-a papersize|-p papersize|-x dtd][-m mapping][-w #][-i #][-Ls]
  -f formatted text output
  -t text output (default)
  -a <paper size name> Adobe PDF output
  -p <paper size name> PostScript output
   paper size like: a4, letter or legal
  -x <dtd> XML output
   like: db (DocBook)
  -m <mapping> character mapping file
  -w <width> in characters of text output
  -i <level> image level (PostScript only)
  -L use landscape mode (PostScript only)
  -r Show removed text
  -s Show hidden (by Word) text


antiword直接将word内容输出到了console中：


root@raspberrypi:/var/www# antiword spec.doc

SYNC Mobile – Ford APA
Project Number: DFYST
Requirements Specification


同样在node.js用child_process调用此命令即可。
解析提取.docx 的内容


对于 docx 文档来说，因基本身就是一个zip文件，只需要在node.js先将其解压，再解析 text.docx\word\document.xml 文件即可。
Github上也有些将docx解析成html的库，
如：
https://github.com/mwilliamson/mammoth.js 
https://github.com/lalalic/docx2html 
等。
总结
以上就是这文章的全部内容了，希望本文的内容对大家的学习或者工作能带来一定的帮助，如有疑问大家可以留言交流，谢谢大家对的支持。