BookMapper.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.ruoyi.mapper.BookMapper">

    <resultMap id="BaseResultMap" type="com.ruoyi.domain.Book">
            <id property="id" column="id" jdbcType="BIGINT"/>
            <result property="name" column="name" jdbcType="VARCHAR"/>
            <result property="createBy" column="create_by" jdbcType="VARCHAR"/>
            <result property="createTime" column="create_time" jdbcType="TIMESTAMP"/>
            <result property="updateBy" column="update_by" jdbcType="VARCHAR"/>
            <result property="updateTime" column="update_time" jdbcType="TIMESTAMP"/>
            <result property="remark" column="remark" jdbcType="VARCHAR"/>
    </resultMap>


    <select id="selectBookList" parameterType="com.ruoyi.domain.Book" resultMap="BaseResultMap">
        SELECT id, name, create_by, create_time, update_by, update_time, remark FROM t_book
        <where>
            <if test="name != null and name != ''">
                name = #{name}
            </if>
        </where>
    </select>
</mapper>