* 本程序是一个简单的端口扫描程序，使用TCP SOCKET * 依次试连接目标主机的端口，以此判断端口开放与否。 * 程序设计上使用了线程池，共100个线程。-* The procedure is a simple port scanning procedures, the use of TCP socket * followed test objectives mainframe connectivity ports in order to judge whether to open ports. * Procedures for the use of the design thread pool, a total of 100 threads.