说明：  Java中的SSL及HTTPS协议实例源码，使用SSL套接字的HTTPS服务器端，接受客户端的一个连接,并返回Hello,world. 　　本例中使用8080端口创建SSL服务器套接字，返回缺省的SocketFactory对象，生成PrintWriter对象,用于输出信息。
(Java SSL and HTTPS protocol source code examples, using SSL socket HTTPS server, the client accepted a connection, and return to Hello, world. In this case the use of port 8080to create SSL server socket, returns the default SocketFactory object, generate PrintWriter objects, for outputting information.)