hibernate map java长到MySQL BIGINT错误

Question

i have a table with id field type BIGINT in MySQL

in hibernate object, i use java Long type for this field

but when run program, it throw exception: Expected: class java.lang.Long, got class java.lang.Integer

how to map MySQL BINGINT datatype in hibernate ?

Answer 1

but when run program, it throw exception: Expected: class java.lang.Long, got class java.lang.Integer

Using a Long for a BIGINT is correct and the above error suggests that you are somehow passing an Integer where a Long is expected somewhere in your code. Double check your code.

Answer 2

如果在映射参数中添加columnDefinition（例如columnDefinition =“bigint（20）”）会有帮助吗？