jdbc:mysql://localhost:3306/studentmanage?characterEncoding=utf8&serverTimezone=UTC&allowMultiQueries=true
在url语句之后加上:&allowMultiQueries=true
jdbc:mysql://localhost:3306/studentmanage?characterEncoding=utf8&serverTimezone=UTC&allowMultiQueries=true
在url语句之后加上:&allowMultiQueries=true