﻿<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>BlogJava-活到老，学到老-随笔分类-Web</title><link>http://www.blogjava.net/simonshen/category/43664.html</link><description /><language>zh-cn</language><lastBuildDate>Tue, 19 Jan 2010 17:04:43 GMT</lastBuildDate><pubDate>Tue, 19 Jan 2010 17:04:43 GMT</pubDate><ttl>60</ttl><item><title>URI和URL的区别</title><link>http://www.blogjava.net/simonshen/archive/2010/01/18/309998.html</link><dc:creator>simon.shen</dc:creator><author>simon.shen</author><pubDate>Mon, 18 Jan 2010 13:13:00 GMT</pubDate><guid>http://www.blogjava.net/simonshen/archive/2010/01/18/309998.html</guid><wfw:comment>http://www.blogjava.net/simonshen/comments/309998.html</wfw:comment><comments>http://www.blogjava.net/simonshen/archive/2010/01/18/309998.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/simonshen/comments/commentRss/309998.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/simonshen/services/trackbacks/309998.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp; 搞了那么多年的程序，一直也没去搞明白URI和URL的区别，总感觉这两个东东差不多。看了《OReilly HTTP The Definitive Guide》，总结一下：<br />
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&nbsp;&nbsp; 从字面上理解，URI强调的是&#8220;资源&#8221;，而URL强调的是&#8220;定位&#8221;.URI<span id="articlecontent" class="wenzhang_con" onmouseup="NewHighlight(event)" style="width: 740px;">更为注重资源而不太注重位置,URI对于定位Internet上的资源是更为通用的架构</span>。<br />
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&nbsp;&nbsp; URI有两种形式：一种是URL，另一种是URN。<br />
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&nbsp;&nbsp; URL表示的是某台特定主机上的一个资源的具体路径，是一个精确的、固定的位置。<br />
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&nbsp;&nbsp;&nbsp; URN（<span lang="EN-GB"><span class="docemphasis1">uniform resource name）</span></span>指的是某一块特定内容的唯一的名字，和资源所在的位置无关，是<span lang="EN-GB">location-independent的，允许资源从一个地方移到另一个地方。<br />
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&nbsp;&nbsp;&nbsp; URN仍然是实验性的，还没有被广泛的采用。URN需要一个基础架构来支持解决资源定位问题。<br />
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&nbsp;&nbsp;&nbsp; 所以说，现在URI基本上都是URL。<br />
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