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获取本机ip,mac地址和时间,依次转换成16进制字符串,并连接到一起,返回的字符串可以作为数据库编程创建数据表的主键ID.-Access to the local ip, mac address and time, followed by 16 to convert hexadecimal string, and connect together, the return of the string can be used as a database programmer to create data table primary key ID.