主流pdf文档搜索引擎评测对比

PDF全称Portable Document Format，译为可移植文档格式，是一种跨平台的电子文件格式。
这一特点使它成为在Internet上进行电子文档发行和数字化信息传播的理想文档格式。越来
越多的电子图书、产品说明、公司文告、网络资料、电子邮件开始使用PDF格式文件。
今天，我们就针对目前互联网上最主流的pdf搜索引擎做一下介绍，让大家能有选择性的快速搜索到需要的pdf资料。
1。toodoc
网址：http://www.toodoc.com
大名鼎鼎的toodoc相信很多朋友都知道并且使用过。它是一个能搜索到PDF,WORD,PPT,EXCEL,TXT等格式的文档搜索引擎，
toodoc提供了对文档查询结果的下载，在线预览，在线提取文本内容的功能。
优点：数据量大，响应速度迅速，功能强大。
缺点：在线预览功能有时无法显示需要刷新页面。
2。pdfxp
网址：http://www.pdfxp.com
pdfxp是一个专为PDF而生的搜索引擎，对搜索结果同样提供了下载，预览和提取内容的功能。并且显示出部分摘要，让您可以
对结果更加一目了然。
优点：界面美观，搜索结果条目清晰，标签功能很实用。
缺点：对中文支持一般。
3。pdf-search
网址：http://www.pdf-search.org
pdf-search不仅能搜索到pdf,而且还提供doc和ppt格式的查询结果。pdf-search对文档的预览有图片和动画两种方式。
优点：速度快，语言支持效果不错。
缺点：结果页列表内容较少。
4. alldatasheet
网址：http:www.alldatasheet.com
alldatasheet是一个能查询到20亿电子元器器件PDF的搜索引擎。这对需要查找电子专业资料的朋友非常有用。alldatasheet更
提供了直观的器件资料的封面图片。
优点：数据量大
缺点：响应速度较慢
Pdf document mainstream comparison search engine evaluation
PDF full Portable Document Format, can be translated into Portable Document Format, is a cross-platform format for electronic documents.
This feature makes it on the Internet for electronic document distribution and dissemination of digital information of the ideal document format. Increasingly
The more e-books, product descriptions, the company statement, the network information, e-mail to start using PDF format.
Today, we present the most mainstream of the Internet search engine do you pdf introduced so that we may be selective to the quick search of the pdf information needs.
1. toodoc
URL:http://www.toodoc.com
The famous toodoc believe many of my friends all know and used. It is a searchable PDF, WORD, PPT, EXCEL, TXT format files, such as search engines,
toodoc provides search results for document downloads, online preview, on-line extraction of text features.
Advantages: large amounts of data, rapid response speed and powerful.
Disadvantages: online preview sometimes need to refresh the page can not be displayed.
2. pdfxp
URL:http://www.pdfxp.com
pdfxp is a PDF and Health for the search engines, search results provided the same download, preview and extract the contents of the function. And part of a summary showing, so that you can
The results more clearly.
Advantages: beautiful interface, the search results entries clear, useful labels.
Disadvantages: support to the Chinese general.
3. pdf-search
URL:http://www.pdf-search.org
pdf-search not only search the pdf, but also provide the doc and ppt format of query results. pdf-search on the document preview image and animation are two ways.
Advantages: fast, good effect of language support.
Disadvantages: The results page lists the contents of less.
4. Alldatasheet
URL: http:www.alldatasheet.com
alldatasheet is a query to two billion yuan device electronic PDF of the search engine. This need for information professionals to find e-friends very useful. alldatasheet more
The device provides visual information on the cover picture.
Advantages: large amounts of data
Disadvantages: slow response