sun-jaxws.xml 是使用SUN的参考实现将Web服务部署为非Java EE5 servlet容器上的标准 WAR 存档时所需的专有部署描述符。

sun-jaxws.xml is a proprietary deployment descriptor needed when web services are deployed as a standard WAR archive on a non-Java EE5 servlet container using the SUN's reference implementation.

Sun的RI使用 WSServletContextListener 作为servlet上下文事件的监听器和 WSServlet 作为调度程序servlet;两者都必须在 web.xml 中声明。然后需要 sun-jaxws.xml 文件来定义 WSServlet 的Web服务端点，让它知道哪个端点必须分派服务请求。

Sun's RI uses WSServletContextListener as the listener for servlet context events and WSServlet as the dispatcher servlet; both of which have to be declared in web.xml. The sun-jaxws.xml file is then required to define web service end points for the WSServlet to let it know to which end point a service request must be dispatched.

通过这种方式，Web服务可以在任何 JAX-WS RI启用的servlet容器中运行，尽管他们赢了不便携。

In this way, web services can be run in any JAX-WS RI enabled servlet container, although they won't be portable.

符合Java EE 5+标准的应用服务器，例如 Glassfish，参考实现，符合JSR 109（ Web服务1.2 / 1.3 ）和JSR 224（ JAX-WS 2.0 / 2.1 / 2.2） ）并且不需要非标准的 sun-jaxws.xml 部署描述符。

Java EE 5+ compliant application servers such as Glassfish, the reference implementation, comply to JSR 109 (Web services 1.2/1.3) and JSR 224 (JAX-WS 2.0/2.1/2.2) and do not require non-standard sun-jaxws.xml deployment descriptors.

请在此处查看更多信息：

Please see here for more information:

http://jax-ws.java.net/nonav/2.2.1/docs/UsersGuide.html#1.0_Introduction

http://www.ibm.com /developerworks/java/library/j-jws9/index.html