实现上位机与底层现场设备数据的交互，通过opc可以轻松达到数据交互的目的(To realize the interaction between the host computer and the lower field device data, it can easily achieve the purpose of data interaction through OPC)

在已有java web工程里添加读取opc的接口类。通过接口将opc数据读取到本地存于oracle数据库中，供本管理系统趋势分析用。本实例在win7、xp系统本地均已调通。压缩包里有本人写的每一步详细说明操作步骤。仅供初学者参考，让初学者调试少走弯路。(Add an interface class that reads OPC in the existing Java Web project. The OPC data is read through the interface and stor

使用utgard连接opc服务器，读取数据(Use utgard to connect to the OPC server and read the data)

opc接数,java工程接收opc数据。(recive opc data for java project)