Hump naming and underlining

I'm doing it today springboot+mybatis I stepped on a small pit when I was working on the project , Remember to set in the configuration file when using the hump naming method ( I was in yaml Configured in )

Camel nomenclature is when variable names or function names are linked by one or more words , And form a unique identifier , The first word begins with a lowercase letter ; The first letter of every word from the second word is capitalized , for example ：myFirstName、myLastName, Such variable names look like camel's hump , Therefore, the name .

mybatis:
  configuration:
    map-underscore-to-camel-case: true

The hump nomenclature should be set to true.
But do not open the underline when using it ！ Otherwise, the underlined value in the query database will be null . I found it by accident , I wanted to turn this setting off and then turn it on , Just turn it off .