主要实现了点歌系统后台的歌曲上传，歌星管理，串口连接。-Main achievement of the VOD system upload the background music, the singer management, serial port connection.

　　串口程序我后来研究了好久，写了下面的代码，后台生成一个线程监听串口，不影响前台工作。效果很好，一直用于GPS仪器的数据接收。 -Serial program I later research for a long time, wrote the code below, the background generates a thread surveillance serial ports, do not affect the front desk work. The effect is ver