说明：  本例介绍了如何使用MIDlet和Servlet进行数据通信，并演示了两种常用的方法POST和GET，这是开发联网应用程序最应该掌握的内容。请注意在联网过程中应该在新线程中操作。
(the cases on how to use the Servlet MIDlet and data communications, and demonstration of two commonly used methods POST and GET, which is the development of networking applications most need to know the contents. Please note that the process of networking in the new thread should operate.)