Spring MVC project error: Namespace in turns red

Namespace in <mapper namespace> turns red


The XML file header language should be changed to the mapper mapping instead of the config
previously used as follows:

<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"

Change to

<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

Create folders with different functions

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