Java_URL

转载于 2014-03-27 17:00:00 发布 · 95 阅读

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原文链接：https://my.oschina.net/LosersAFC/blog/213447

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#java #python

本文详细介绍了如何使用Java的URL和URLConnection类来访问远程网站，包括构造URL对象、理解URI与URL的区别，并提供了实例代码演示。

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###Making URL Connections
To access web servers in a Java program, you will want to work on a higher level than making a socket connection and issuing HTTP requests. In the following sections, we discuss the classes that the Java library provides for this purpose. ####URLs and URIs The URL and URLConnection classes encapsulate much of the complexity of retrieving information from a remote site. You can construct a URL object from a string: URL url = new URL(urlString);

A URI is a purely syntactical construct that contains the various parts of the string specifying a web resource. A URL is a special kind of URI, namely, one with sufficient information to locate a resource. Other URIs, such as mailto:cay@horstmann.com are not locators—there is no data to locate from this identifier. Such a URI is called a URN (uniform resource name).

转载于:https://my.oschina.net/LosersAFC/blog/213447