串口模拟器和Java源码，VSPD是国外比较好的一款串口模拟器，可虚拟1~20口，也可检测本机存在物理占用端口，使用程序传送数据后在程序里面也有字节体现-Serial simulator and the Java source code, VSPD is better abroad a serial port emulator can be virtual 1 to 20, can detect the presence of native physical occupation of the