Step 1: Enter the directory settings->Editor->File and Code Templates
Step 2: Add template step
Here is the content of the template
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="">
</mapper>
When you add it again, you can see