线程安全实例。该程序说明线程安全问题。该例子实现的功能与多线程并发服务器实例的类似，但增加了一个客户数据存储功能，即服务器将存储每个连接客户所发来的所有数据，当连接终止后，服务将显示客户的名字及相应的数据。-thread safety examples. Descr iption of the procedures for the security thread. The examples of the functions and multi-threaded server with similar examples, but the addition of a customer data storage function, which is to store each server will connect customers come in all the data, when connected after termination of service customers will show the names and corresponding data.