Book.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.example.springboot.mapper.BookMapper">



    <select id="listByCondition" resultType="com.example.springboot.entity.Book">
        select * from book
        <where>
            <if test="name != null and name != ''">
                name like concat('%', #{ name }, '%')
            </if>
            <if test="bookNo != null and bookNo != ''">
                and book_no = #{bookNo}
            </if>
        </where>
        order by id desc
    </select>

    <insert id="save">
        insert into book(name, description, publish_date, author, publisher, category, book_no, cover, score, nums)
        values(#{name}, #{description}, #{publishDate}, #{author}, #{publisher}, #{category}, #{bookNo}, #{cover}, #{score}, #{nums})
    </insert>

    <update id="updateById">
        update book set name = #{name}, description = #{description}, publish_date = #{publishDate}, author = #{author}, publisher = #{publisher}, category = #{category}, book_no = #{bookNo}, cover = #{cover}, updatetime = #{updatetime}, score = #{score}, nums = #{nums} where id = #{id}
    </update>

    <update id="updateNumByNo">
        update book set nums = nums + 1 where book_no = #{bookNo}
    </update>

    <delete id="deleteById">
        delete from book where id = #{id}
    </delete>

    <select id="list" resultType="com.example.springboot.entity.Book">
        select * from book order by id desc
    </select>

    <select id="getById" resultType="com.example.springboot.entity.Book">
        select * from book where id = #{id}
    </select>
    <select id="getByNo" resultType="com.example.springboot.entity.Book">
        select * from book where book_no = #{bookNo}
    </select>
</mapper>