caimei365-cloud-user/src/main/resources/mapper/PersonalCenterMapper.xml

<?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="com.caimei365.user.mapper.PersonalCenterMapper">
    <select id="getUnReadMessageCount" resultType="java.lang.Integer">
        SELECT COUNT(*) FROM message WHERE toUserID = #{userId} AND readFlag='0'
    </select>
</mapper>