本代码可以实现对SQl数据库的加载，登陆，查询，非查询操作，即增，删改等功能是一般的方法，复用性良好，具体自己操作。-This code can realize the load on the SQL database, landing, query, non-query operation, that is, increase, deletion and other functions is the general approach, reusability, specific operati