mybatis result set mapping ResultMap

Problem presentation

solution

1. SQL alias (not recommended)

2. ResultMap (recommended)

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Problem presentation

The department name field cannot be mapped. Even if mybatis camel case name mapping is turned on, Mybatis does not open the camel case name mapping mapUnderscoreToCamelCase , because this attribute is different from the database column word, it is 2 words at all

solution

1. SQL alias (not recommended)

2. ResultMap (recommended)