快捷導(dǎo)航

MybatisPlus將自定義的sql列表查詢返回改為分頁查詢

更新時(shí)間：2024年04月15日 08:29:19 作者：Big-Peng

本文主要介紹了MybatisPlus將自定義的sql列表查詢返回改為分頁查詢，文中通過示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值，需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧

問題描述

在開發(fā)過程中在 mapper.xml 文件中自定義了一個(gè) sql 查詢列表的 select 語句，但是由于前端需要的是分頁數(shù)據(jù)，需要在后端將列表查詢改成分頁查詢

修改前

1. 查詢數(shù)據(jù)類型

@Data
public class OppRelMoveWrapper implements BaseData {
    /**
     * ID
     */
    private Long id;

    /**
     * 商機(jī)ID
     */
    private Long oppId;

    /**
     * RELATIONSHIP
     */
    private String relationship;

    /**
     * 關(guān)系評(píng)價(jià)附件
     */
    private String attachmentRel;

    /**
     * CHIEF_RECORD
     */
    private String chiefRecord;

    /**
     * 首席代表動(dòng)態(tài)記錄附件
     */
    private String attachmentChief;

    /**
     * ORDINARY_RECORD
     */
    private String ordinaryRecord;

    /**
     * 普通動(dòng)態(tài)記錄附件
     */
    private String attachmentOrdinary;

    /**
     * 錄入人
     */
    private Long createStaff;

    /**
     * 錄入時(shí)間
     */
    private Date createDate;

    /**
     * 更新時(shí)間
     */
    private Date updateDate;
}

2. mapper定義

@Mapper
public interface OppRelationshipInfoMoveMapper extends BaseMapper<OppRelationshipInfoMove> {
    
    List<OppRelMoveWrapper> queryMoveClientList(@Param("query") OppRelMoveQuery query);
}

3. xml文件定義

該語句查詢的是一個(gè)返回?cái)?shù)據(jù)類型為OppRelationshipInfoMoveMap的列表

  <resultMap type="com.wrapper.OppRelMoveWrapper"
               id="OppRelationshipInfoMoveMap">
        <result property="id" column="ID" jdbcType="INTEGER"/>
        <result property="oppId" column="OPP_ID" jdbcType="INTEGER"/>
        <result property="relationship" column="RELATIONSHIP" jdbcType="VARCHAR"/>
        <result property="attachmentRel" column="attachment_rel" jdbcType="VARCHAR"/>
        <result property="chiefRecord" column="CHIEF_RECORD" jdbcType="VARCHAR"/>
        <result property="attachmentChief" column="attachment_chief" jdbcType="VARCHAR"/>
        <result property="ordinaryRecord" column="ORDINARY_RECORD" jdbcType="VARCHAR"/>
        <result property="attachmentOrdinary" column="attachment_ordinary" jdbcType="VARCHAR"/>
        <result property="createStaff" column="CREATE_STAFF" jdbcType="INTEGER"/>
        <result property="createDate" column="CREATE_DATE" jdbcType="TIMESTAMP"/>
        <result property="updateDate" column="UPDATE_DATE" jdbcType="TIMESTAMP"/>
    </resultMap>

    <select id="queryMoveClientList" resultMap="OppRelationshipInfoMoveMap">
        SELECT
        ID,
        OPP_ID,
        RELATIONSHIP,
        attachment_rel,
        CHIEF_RECORD,
        attachment_chief,
        ORDINARY_RECORD,
        attachment_ordinary,
        CREATE_STAFF,
        CREATE_DATE,
        UPDATE_DATE
        FROM opp_relationship_info_move
        WHERE 1=1
        <if test="query.createDate != null and query.createDate != ''">
            AND DATE_FORMAT(CREATE_DATE, '%Y-%m-%d') = #{query.createDate}
        </if>
        <if test="query.updateDate != null and query.updateDate != ''">
            AND DATE_FORMAT(UPDATE_DATE, '%Y-%m-%d') = #{query.updateDate}
        </if>
        <if test="query.oppId != null and query.oppId != ''">
            AND OPP_ID = #{query.oppId}
        </if>
        ORDER BY CREATE_DATE DESC
    </select>

4. 函數(shù)使用

List<OppRelMoveWrapper> moveWrapperList = oppRelationshipInfoMoveMapper.queryMoveClientList(query);

修改后

修改成分頁查詢比較簡單，直接將 mapper 的查詢方法修改即可

1. 修改mapper

將函數(shù)返回的數(shù)據(jù)改成 Page類型

@Mapper
public interface OppRelationshipInfoMoveMapper extends BaseMapper<OppRelationshipInfoMove> {
    Page<OppRelMoveWrapper> queryMoveClientList(Page<Object> page, @Param("query") OppRelMoveQuery query);
}

2. 函數(shù)使用

注意： 構(gòu)造Page時(shí)里面的 pageNum 和 pageSize 一定要存在?。?！否則獲得的 Page 中的 records 為空?。?！

  Page<OppRelMoveWrapper> moveWrapperPage = oppRelationshipInfoMoveMapper.queryMoveClientList(
                new Page(query.getPage(), query.getPageSize(), true), query);