Lesson: Java Web Start课程：Java Web Start

Java Web Start software provides the power to launch full-featured applications with a single click. Java Web Start软件提供了只需单击一下即可启动全功能应用程序的能力。Users can download and launch applications, such as a complete spreadsheet program or an Internet chat client, without going through lengthy installation procedures.用户可以下载并启动应用程序，例如完整的电子表格程序或互联网聊天客户端，而无需经过漫长的安装过程。

With Java Web Start software, users can launch a Java application by clicking a link in a web page. 使用Java Web Start软件，用户可以通过单击网页中的链接来启动Java应用程序。The link points to a Java Network Launch Protocol (JNLP) file, which instructs Java Web Start software to download, cache, and run the application.该链接指向一个Java网络启动协议（JNLP）文件，该文件指示Java Web Start软件下载、缓存和运行应用程序。

Java Web Start software provides Java developers and users with many deployment advantages:Java Web Start软件为Java开发者和用户提供了许多部署优势：

• With Java Web Start software, you can place a single Java application on a web server for deployment to a wide variety of platforms, including Windows, Linux, and Solaris.使用Java Web Start软件，您可以在Web服务器上放置一个Java应用程序，以便部署到各种平台，包括Windows、Linux和Solaris。
• Java Web Start software supports multiple, simultaneous versions of the Java platform. Java Web Start软件支持Java平台的多个同时版本。An application can request a specific version of the Java Runtime Environment (JRE) software without conflicting with the needs of other applications.应用程序可以请求特定版本的Java运行时环境（JRE）软件，而不会与其他应用程序的需求发生冲突。
• Users can create a desktop shortcut to launch a Java Web Start application outside a browser.用户可以创建桌面快捷方式，在浏览器外启动Java Web Start应用程序。
• Java Web Start software takes advantage of the inherent security of the Java platform. Java Web Start软件利用了Java平台固有的安全性。By default, applications have restricted access to local disk and network resources.默认情况下，应用程序限制对本地磁盘和网络资源的访问。
• Applications launched with Java Web Start software are cached locally for improved performance.使用Java Web Start软件启动的应用程序在本地缓存以提高性能。
• Updates to a Java Web Start application are automatically downloaded when the application is run standalone from the user's desktop.当Java Web Start应用程序从用户桌面独立运行时，会自动下载该应用程序的更新。

Java Web Start software is installed as part of the JRE software. Java Web Start软件是作为JRE软件的一部分安装的。Users do not have to install Java Web Start software separately or perform additional tasks to use Java Web Start applications.用户无需单独安装Java Web Start软件或执行其他任务即可使用Java Web Start应用程序。

Additional References其他参考资料

This lesson is intended to get you started with Java Web Start technology and does not include all available documentation. 本课程旨在让您开始了解Java Web Start技术，但不包括所有可用的文档。For more information about Java Web Start technology, see the following:有关Java Web Start技术的更多信息，请参阅以下内容：

• Java Web Start Guide
• Java Web Start FAQ
• JNLP Specification
• javax.jnlp API Documentation
• Java Web Start Developers Site