说明： 什么是Web Service?对这个问题，我们至少有两种答案。从表面上看，Web service 就是一个应用程序，它向外界暴露出一个能够通过Web进行调用的API。这就是说，你能够用编程的方法通过Web来调用这个应用程序。我们把调用这个Web service 的应用程序叫做客户。 (What is Web Service? Of this problem, we are at least two answers. On the surface, Web service is an application that exposed to the outside world through the Web to carry out a call API. This means that you can use the method of programming through the Web to call this application. We call the Web service client applications called.)
