Int type input directly submits data 0 instead of empty

There are two tables with int type input. if the data directly submitted to the database is 0 instead of null, the default value is null, not 0, but the result I want is null. how can I solve this problem? great guidance and gratitude

The form has two databases whose input is int type. if the data directly submitted to the database is 0, it is not empty.
By default, the database is empty, not 0, but the result I want is empty. how can I solve this problem? thank you!

Reply content:

The form has two databases whose input is int type. if the data directly submitted to the database is 0, it is not empty.
By default, the database is empty, not 0, but the result I want is empty. how can I solve this problem? thank you!

Use empty to check whether the variable is null, and then assign a new value to the ''character. the inserted database is empty.

JavaThe front end is a string. Rewrite it.BeanCorresponding fieldSetHow to try

It is the default value of this field in the database. if it is not set to the default value, it is null.