本银行系统涉及到多线程，Socket编程，和Singleton设计模式。源玛注释齐全，有说明文档，并附开发过程的UML设计图。仅供学习参考，望多多指教。-the banking system relates to multi-threaded, socket programming, and Singleton design pattern. Notes for the complete source Gilmour, documentation, together with the development process UML design. Study reference only, hope the exhibitions.