Mapper接口

@Mapper
public interface GoodsMapper extends BaseMapper<Goods> {
    /**
     * 根据条件分页查询
     *
     * @param page
     * @param goodsCondition
     * @return
     */
    IPage<GoodsItem> selectPage(IPage<GoodsItem> page, @Param("condition") GoodsCondition goodsCondition);
}

注意：方法的返回值为IPage对象，只有这样，在使用时，查询出来的结果才会自动赋值给IPage对象。参看下面的测试方法。

映射文件

<?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.hc.mapper.GoodsMapper">
    <sql id="Base_Column_List">
        <!--@mbg.generated-->
        id, `name`, barcode, price1, price2, amount, img, pics, category_id, country_id,
        addr, sell_point, priority, `status`, create_time, update_time
    </sql>
    
    <select id="selectPage" resultType="com.hc.res.GoodsItem" parameterType="com.hc.query.GoodsCondition">
        select
        <include refid="Base_Column_List"/>
        from tb_goods
        <where>
            <if test="condition.id != null">
                and id = #{condition.id,jdbcType=BIGINT}
            </if>
            <if test="condition.name != null">
                and name = #{condition.name,jdbcType=VARCHAR}
            </if>
            <if test="condition.barcode != null">
                and barcode = #{condition.barcode,jdbcType=VARCHAR}
            </if>
            <if test="condition.price1 != null">
                and price1 = #{condition.price1,jdbcType=DECIMAL}
            </if>
            <if test="condition.price2 != null">
                and price2 = #{condition.price2,jdbcType=DECIMAL}
            </if>
            <if test="condition.amount != null">
                and amount = #{condition.amount,jdbcType=INTEGER}
            </if>
            <if test="condition.categoryId != null">
                and category_id = #{condition.categoryId,jdbcType=INTEGER}
            </if>
            <if test="condition.countryId != null">
                and country_id = #{condition.countryId,jdbcType=INTEGER}
            </if>
            <if test="condition.addr != null">
                and addr = #{condition.addr,jdbcType=VARCHAR}
            </if>
            <if test="condition.sellPoint != null">
                and sell_point = #{condition.sellPoint,jdbcType=VARCHAR}
            </if>
            <if test="condition.status != null">
                and status = #{condition.status,jdbcType=INTEGER}
            </if>
            <if test="condition.start != null and condition.end !=null ">
                and create_time between #{condition.start,jdbcType=TIMESTAMP} and #{condition.end,jdbcType=TIMESTAMP}
            </if>
        </where>
    </select>
</mapper>

测试代码

@SpringBootTest
class GoodsMapperTest {

    @Resource
    private GoodsMapper goodsMapper;

    @Test
    void selectPage() {
        IPage<GoodsItem> page = new Page<>(1, 10);
        GoodsCondition goodsCondition = GoodsCondition.builder()
//                .id(3L)
//                .name("fdsa")
//                .price1(BigDecimal.valueOf(324))
//                .start(LocalDateTime.now())
//                .end(LocalDateTime.now())
                .build();
        goodsMapper.selectPage(page, goodsCondition);

        System.out.println(page);
    }
}