iden_server/src/main/resources/mybatis/IdenAutoincrKeyMapper.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.iden.common.mapper.IdenAutoincrKeyMapper">
    <update id="updateMaxValue">
        <!-- AFTER：更新语句执行后执行selectKey -->
        <selectKey resultType="java.lang.Long" keyProperty="maxValue" order="AFTER">
            select max_value FROM iden_autoincr_key where key = #{key}
        </selectKey>
        update iden_autoincr_key set max_value = max_value + 1 where key = #{key}
    </update>
</mapper>