Java中调用DLL,访问打印机的程序或者并口-Java call DLL, to access the program or parallel port printer

并口、串口打印机访问接口，java调用工程。-Parallel, serial, printer access interface, java call engineering.

所有前端后台代码封装过后十分精简易上手，出错效率低。同时支持移动客户端访问。(All front end background code is very simple and easy to use after encapsulation. Support mobile client access at the same time)