OPC ua 的客户端测试程序，亲测通过，欢迎使用。(OPC UA client test program.)

java实现的opc ua 客户端，源码。大家可以看看，简单，易懂，只有4个文件。(OPC UA client implemented in java, source code. As you can see, it is simple and easy to understand. There are only four documents.)