连接数据库并向mysql中插入数据 返回新插入的数据-connect to mysql database insert new data back into the data

连接mysql建立的学生管理系统，实现增删改查功能，但没有登录界面，待改善中。(Connect the student management system established by Mysql to realize the function of adding, deleting, modifying and checking, but there is no login interface, which needs to be improved.)