【mysql】 mybatis實現 主從表 left join 1:n 一對多 分頁查詢 主表從表都有查詢條件 【mybatis】count 統計+JSON查詢

mybatis實現 主從表 left join  1:n 一對多 分頁查詢   主表從表都有查詢條件+count

 

需求：

========================================

1.主從表數據 是 1：m

2.主從表各自都有查詢條件

3.最后查詢結果 需要分頁，並統計總數

 

 

注意：

=======================================

1.查詢的分頁，必須在數據庫做，否則分頁沒有意義

 

 

 

解決方法：

 

注意 下面的入參中 [第一頁的10條]

pageNum=0

PageSize=10

 

實際入參應該是處理過的

pageNum = pageNum*10
pageSize = 10

 

 

 

 

##############################有對應實體接收查詢結果的情況下################################

1.mapper.xml應該這么寫

<resultMap type="com.lsrsjava.daywork.domain.week.自定義Bean" id="myResultMap">
    <id column="id" property="id"/>
    <!--一堆的主表 屬性-->
    <result column="userId" property="userId"/>
    <result column="userName" property="userName"/>
    <result column="userImg" property="userImg"/>
    

    
    <!--子表對應的屬性 封裝在list中  即接收了 主表對子表的 1:N -->    
    <collection property="listData" javaType="com.lsrsjava.daywork.domain.week.子表Bean" columnPrefix="slaveTable_">
        <id column="id" property="id"/>
        <result column="rowId" property="rowId"/>
        <result column="colName" property="colName"/>
        <result column="val" property="val"/>
    </collection>
</resultMap>


<select id="pageFind" resultMap="myResultMap" parameterType="com.lqjava.daywork.api.beans.WorksheetDataSaveBean">

  SELECT
    base.id,
    t.id slaveTable_id,
    t.row_id slaveTable_rowId,
    t.col_name slaveTable_colName,
    t.val slaveTable_val
  FROM
    (
        SELECT
            *
        FROM
            worksheet_data_${dataId}
        WHERE
--  此處之后加 主表的 where查詢條件拼接

        LIMIT #{pageNum}, #{pageSize}
    ) base
    LEFT JOIN
        worksheet_data_table_data t
    ON
        base.id = t.row_id
    WHERE
    <!-- 此處之后加 子表單的 where查詢拼接 -->
</select>

 

2.mapper.java應該這么寫

List<自定義的Bean> pageFind(WorksheetDataSaveBean queryBean);

 

 

############################### 不確定返回字段類型[即表中屬性是動態的，沒有對應實體的情況下]###################################

1.mapper.xml中應該這么寫

[下面的示例中：因為我不確定返回的字段，所以用HashMap直接接收查詢結果后 自己處理的結果集]

   <select id="pageFind" resultType="java.util.HashMap" parameterType="com.lsrjava.daywork.api.beans.WorksheetDataSaveBean">

      SELECT
        base.*,
        t.id slaveTable_id,
        t.row_id slaveTable_rowId,
        t.col_name slaveTable_colName,
        t.val slaveTable_val
      FROM
        (
            SELECT
                *
            FROM
                worksheet_data_${dataId}
　　　　　　　WHERE
    --     此處之后加 主表的 where查詢條件拼接

            LIMIT #{pageNum}, #{pageSize}
        ) base
        LEFT JOIN
            worksheet_data_table_data t
        ON
            base.id = t.row_id
　　　　 WHERE

        <!-- 此處之后加 子表單的 where查詢拼接 -->
    </select>

 

 

2.mapper.java應該這么寫

List<Map<String,String>> pageFind(WorksheetDataSaveBean queryBean);

 

 

===================================count=============================================

count 是什么？count就是頁面的 總共total條數

 

1.mapper.xml應該這么寫

<select id="count" parameterType="com.lqjava.daywork.api.beans.WorksheetDataSaveBean" resultType="java.lang.Long">
    SELECT
        count( DISTINCT base.id ) count
    FROM
        worksheet_data_${dataId} base
    LEFT JOIN
      worksheet_data_table_data c
    ON
      c.row_id = base.id
--         拼接條件的地方

</select>

 

2.mapper.java應該這么寫

Long count(WorksheetDataSaveBean queryBean);

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

====================================附錄，完整的 分頁+left join+count+不確認返回列+Map接收+mybatis標簽嵌套+json字段查詢+字符串轉日期+字符串轉數值+結果集封裝處理========================================

需求：

　　　1.數據表 列是動態的多列，因此不確定查詢返回是哪些列【因此使用Map接收】

　　　2.主表一行 關聯 子表的多行 【因此需要left join】

　　　3.對於主表和子表的所有列，需要提供查詢功能【因此需要使用mybatis標簽拼接查詢條件】

　　　4.主表是正常數據，子表是JSON數據存儲【因此需要提供有關JSON字段查詢處理的操作】

　　　5.查詢出的List<Map>結果集 size=主size*子size 【因此，結果集需要將子表數據封裝進主表數據集 java處理】

　　　6.上述結果集條數不能作為分頁查詢的count統計，返回總頁碼【因此需要額外count()查詢，以返回正確的total】

 

 

 

代碼參考：

 

1.Mapper.xml【一個page查詢   一個count查詢】

 <select id="pageFind" resultType="java.util.HashMap" parameterType="com.lqjava.daywork.api.beans.WorksheetDataSaveBean">

      SELECT
        base.*,
        u.name create_by_name,
        u2.name update_by_name,
        t.id slaveTable_id,
        t.row_id slaveTable_rowId,
        t.col_name slaveTable_colName,
        t.val slaveTable_val
      FROM
        (

            SELECT
              d.*
            FROM
            worksheet_data_${dataId} d
        <!-- 此處之后加 主表的 where查詢條件拼接 -->
            <where>
                <if test="list != null">
                    <foreach collection="list" item="item" index="index" separator="AND" open="(" close=")">
                        <choose>
                            <when test='item.cname.contains("date")'>
                                <choose>
                                    <when test='item.operator.contains("between")   and  item.endValue != null'>
                                        DATE_FORMAT(${item.cname} , ${item.dateFormat} ) BETWEEN DATE_FORMAT( #{item.value}, ${item.dateFormat} )  AND  DATE_FORMAT( #{item.endValue}, ${item.dateFormat} )
                                    </when>
                                    <otherwise>
                                        DATE_FORMAT( ${item.cname}, ${item.dateFormat} ) = DATE_FORMAT( #{item.value}, ${item.dateFormat} )
                                    </otherwise>
                                </choose>
                            </when>

                            <when test='item.cname.contains("input-number")'>
                                <choose>
                                    <when test='item.operator.contains("between")   and  item.endValue != null'>
                                        CAST(${item.cname}  AS   DECIMAL)  BETWEEN  #{item.value}  AND #{item.endValue}
                                    </when>
                                    <otherwise>
                                        CAST(${item.cname}  AS   DECIMAL)  = #{item.value}
                                    </otherwise>
                                </choose>
                            </when>

                            <when test='item.cname.contains("checkbox") or item.cname.contains("select")'>
                                  <if test="item.valueList != null">
                                      <choose>
                                          <when test=' "OR".equals(item.reOperator) '>
                                              <foreach collection="item.valueList " item="v" index="i" separator="OR"  open="(" close=")">
                                                  FIND_IN_SET( #{v},${item.cname} )
                                              </foreach>
                                          </when>
                                          <otherwise>
                                              <foreach collection="item.valueList " item="v" index="i" separator="AND"  open="(" close=")">
                                                  FIND_IN_SET( #{v},${item.cname} )
                                              </foreach>
                                          </otherwise>
                                      </choose>
                                  </if>
                            </when>

                            <when test='item.cname.contains("dept-user") or item.cname.contains("dept-base")'>
                                <if test="item.valueList != null">
                                    <choose>
                                        <when test=' "OR".equals(item.reOperator) '>
                                            <foreach collection="item.valueList " item="v" index="i" separator="OR"  open="(" close=")">

                                                <choose>
                                                    <when test='item.operator.contains("like") '>
                                                        ${item.cname} -> '$[*].name' like  '%${v}%'
                                                    </when>
                                                    <otherwise>
                                                        JSON_CONTAINS( ${item.cname} ->'$[*].name' ,  '"${v}"', '$')
                                                    </otherwise>
                                                </choose>

                                            </foreach>
                                        </when>
                                        <otherwise>
                                            <foreach collection="item.valueList " item="v" index="i" separator="AND"  open="(" close=")">

                                                <choose>
                                                    <when test='item.operator.contains("like") '>
                                                        ${item.cname} -> '$[*].name' like  '%${v}%'
                                                    </when>
                                                    <otherwise>
                                                        JSON_CONTAINS( ${item.cname} ->'$[*].name' , '"${v}"', '$')
                                                    </otherwise>
                                                </choose>

                                            </foreach>
                                        </otherwise>
                                    </choose>
                                </if>
                            </when>


                            <otherwise>
                                <choose>
                                    <when test='item.operator.contains("like") '>
                                        ${item.cname} like  '%${item.value}%'
                                    </when>
                                    <otherwise>
                                        ${item.cname} = #{item.value}
                                    </otherwise>
                                </choose>
                            </otherwise>

                        </choose>
                    </foreach>
                </if>
            </where>

            LIMIT #{pageNum}, #{pageSize}
        ) base
        LEFT JOIN
          (SELECT * from worksheet_data_table_data where data_id = #{dataId}) t
        ON
            base.id = t.row_id
        LEFT JOIN
          dept_user u
        ON
          base.create_by = u.id
        LEFT JOIN
          dept_user u2
        ON
          base.update_by = u2.id

        <!-- 此處之后加 子表單的 where查詢拼接 -->
        <where>
            <if test="slaveList != null">
                <foreach collection="slaveList" item="item" index="index" separator="AND" open="(" close=")">

                    t.col_name  = #{item.tableName}
                    AND

                    <choose>
                        <when test='item.cname.contains("date")'>
                            <choose>
                                <when test='item.operator.contains("between")   and  item.endValue != null'>
                                    STR_TO_DATE(val -> '$.${item.cname}','"%Y-%m-%d %H:%i:%s"')  between #{item.value} AND date_add(#{item.endValue}, interval 1 day)
                                </when>
                                <otherwise>
                                    STR_TO_DATE(val -> '$.${item.cname}','"%Y-%m-%d %H:%i:%s"')  between #{item.value} AND date_add(#{item.value}, interval 1 day)
                                </otherwise>
                            </choose>
                        </when>

                        <when test='item.cname.contains("input-number")'>
                            <choose>
                                <when test='item.operator.contains("between")   and  item.endValue != null'>
                                    CAST(val -> '$."${item.cname}"' AS DECIMAL) BETWEEN  #{item.value}  AND #{item.endValue}
                                </when>
                                <otherwise>
                                    CAST(val -> '$."${item.cname}"' AS DECIMAL) = #{item.value}
                                </otherwise>
                            </choose>
                        </when>

                        <when test='item.cname.contains("checkbox") or item.cname.contains("select")'>
                            <if test="item.valueList != null">
                                <choose>
                                    <when test=' "OR".equals(item.reOperator) '>
                                        <foreach collection="item.valueList " item="v" index="i" separator="OR"  open="(" close=")">
                                            val -> '$.${item.cname}' like '%,${v},%'
                                        </foreach>
                                    </when>
                                    <otherwise>
                                        <foreach collection="item.valueList " item="v" index="i" separator="AND"  open="(" close=")">
                                            val -> '$.${item.cname}' like '%,${v},%'
                                        </foreach>
                                    </otherwise>
                                </choose>
                            </if>
                        </when>

                        <when test='item.cname.contains("dept-user") or item.cname.contains("dept-base")'>
                            <if test="item.valueList != null">
                                <choose>
                                    <when test=' "OR".equals(item.reOperator) '>
                                        <foreach collection="item.valueList " item="v" index="i" separator="OR"  open="(" close=")">
                                            val -> '$."${item.cname}"' like '%${v}%'
                                        </foreach>
                                    </when>
                                    <otherwise>
                                        <foreach collection="item.valueList " item="v" index="i" separator="AND"  open="(" close=")">
                                            val -> '$."${item.cname}"' like '%${v}%'
                                        </foreach>
                                    </otherwise>
                                </choose>
                            </if>
                        </when>

                        <otherwise>
                            <choose>
                                <when test='item.operator.contains("like") '>
                                    val -> '$.${item.cname}' like '%${item.value}%'
                                </when>
                                <otherwise>
                                    JSON_CONTAINS( val ->'$.${item.cname}' , '"${item.value}"', '$')
                                </otherwise>
                            </choose>
                        </otherwise>

                    </choose>

                </foreach>
            </if>
        </where>



    </select>


    <select id="count" parameterType="com.lqjava.daywork.api.beans.WorksheetDataSaveBean" resultType="java.lang.Long">
        SELECT
            count( DISTINCT base.id ) count
        FROM
            worksheet_data_${dataId} base
        LEFT JOIN
           (SELECT * from worksheet_data_table_data where data_id = #{dataId}) c
        ON
          c.row_id = base.id
      <!-- 主表 + 子表 查詢條件拼接 -->
        <where>
            <if test="list != null">
                <foreach collection="list" item="item" index="index" separator="AND" open="(" close=")">
                    <choose>
                        <when test='item.cname.contains("date")'>
                            <choose>
                                <when test='item.operator.contains("between")   and  item.endValue != null'>
                                    DATE_FORMAT(${item.cname} , ${item.dateFormat} ) BETWEEN DATE_FORMAT( #{item.value}, ${item.dateFormat} )  AND  DATE_FORMAT( #{item.endValue}, ${item.dateFormat} )
                                </when>
                                <otherwise>
                                    DATE_FORMAT( ${item.cname}, ${item.dateFormat} ) = DATE_FORMAT( #{item.value}, ${item.dateFormat} )
                                </otherwise>
                            </choose>
                        </when>

                        <when test='item.cname.contains("input-number")'>
                            <choose>
                                <when test='item.operator.contains("between")   and  item.endValue != null'>
                                    CAST(${item.cname}  AS   DECIMAL)  BETWEEN  #{item.value}  AND #{item.endValue}
                                </when>
                                <otherwise>
                                    CAST(${item.cname}  AS   DECIMAL)  = #{item.value}
                                </otherwise>
                            </choose>
                        </when>

                        <when test='item.cname.contains("checkbox") or item.cname.contains("select")'>
                            <if test="item.valueList != null">
                                <choose>
                                    <when test=' "OR".equals(item.reOperator) '>
                                        <foreach collection="item.valueList " item="v" index="i" separator="OR"  open="(" close=")">
                                            FIND_IN_SET( #{v},${item.cname} )
                                        </foreach>
                                    </when>
                                    <otherwise>
                                        <foreach collection="item.valueList " item="v" index="i" separator="AND"  open="(" close=")">
                                            FIND_IN_SET( #{v},${item.cname} )
                                        </foreach>
                                    </otherwise>
                                </choose>
                            </if>
                        </when>

                        <when test='item.cname.contains("dept-user") or item.cname.contains("dept-base")'>
                            <if test="item.valueList != null">
                                <choose>
                                    <when test=' "OR".equals(item.reOperator) '>
                                        <foreach collection="item.valueList " item="v" index="i" separator="OR"  open="(" close=")">

                                            <choose>
                                                <when test='item.operator.contains("like") '>
                                                    ${item.cname} -> '$[*].name' like  '%${v}%'
                                                </when>
                                                <otherwise>
                                                    JSON_CONTAINS( ${item.cname} ->'$[*].name' ,  '"${v}"', '$')
                                                </otherwise>
                                            </choose>

                                        </foreach>
                                    </when>
                                    <otherwise>
                                        <foreach collection="item.valueList " item="v" index="i" separator="AND"  open="(" close=")">

                                            <choose>
                                                <when test='item.operator.contains("like") '>
                                                    ${item.cname} -> '$[*].name' like  '%${v}%'
                                                </when>
                                                <otherwise>
                                                    JSON_CONTAINS( ${item.cname} ->'$[*].name' , '"${v}"', '$')
                                                </otherwise>
                                            </choose>

                                        </foreach>
                                    </otherwise>
                                </choose>
                            </if>
                        </when>


                        <otherwise>
                            <choose>
                                <when test='item.operator.contains("like") '>
                                    ${item.cname} like  '%${item.value}%'
                                </when>
                                <otherwise>
                                    ${item.cname} = #{item.value}
                                </otherwise>
                            </choose>
                        </otherwise>

                    </choose>
                </foreach>
            </if>


            <if test="slaveList != null">

                AND

                <foreach collection="slaveList" item="item" index="index" separator="AND" open="(" close=")">

                    c.col_name  = #{item.tableName}
                    AND

                    <choose>
                        <when test='item.cname.contains("date")'>
                            <choose>
                                <when test='item.operator.contains("between")   and  item.endValue != null'>
                                    STR_TO_DATE(val -> '$.${item.cname}','"%Y-%m-%d %H:%i:%s"')  between #{item.value} AND date_add(#{item.endValue}, interval 1 day)
                                </when>
                                <otherwise>
                                    STR_TO_DATE(val -> '$.${item.cname}','"%Y-%m-%d %H:%i:%s"')  between #{item.value} AND date_add(#{item.value}, interval 1 day)
                                </otherwise>
                            </choose>
                        </when>

                        <when test='item.cname.contains("input-number")'>
                            <choose>
                                <when test='item.operator.contains("between")   and  item.endValue != null'>
                                    CAST(val -> '$."${item.cname}"' AS DECIMAL) BETWEEN  #{item.value}  AND #{item.endValue}
                                </when>
                                <otherwise>
                                    CAST(val -> '$."${item.cname}"' AS DECIMAL) = #{item.value}
                                </otherwise>
                            </choose>
                        </when>

                        <when test='item.cname.contains("checkbox") or item.cname.contains("select")'>
                            <if test="item.valueList != null">
                                <choose>
                                    <when test=' "OR".equals(item.reOperator) '>
                                        <foreach collection="item.valueList " item="v" index="i" separator="OR"  open="(" close=")">
                                            val -> '$.${item.cname}' like '%,${v},%'
                                        </foreach>
                                    </when>
                                    <otherwise>
                                        <foreach collection="item.valueList " item="v" index="i" separator="AND"  open="(" close=")">
                                            val -> '$.${item.cname}' like '%,${v},%'
                                        </foreach>
                                    </otherwise>
                                </choose>
                            </if>
                        </when>

                        <when test='item.cname.contains("dept-user") or item.cname.contains("dept-base")'>
                            <if test="item.valueList != null">
                                <choose>
                                    <when test=' "OR".equals(item.reOperator) '>
                                        <foreach collection="item.valueList " item="v" index="i" separator="OR"  open="(" close=")">
                                            val -> '$."${item.cname}"' like '%${v}%'
                                        </foreach>
                                    </when>
                                    <otherwise>
                                        <foreach collection="item.valueList " item="v" index="i" separator="AND"  open="(" close=")">
                                            val -> '$."${item.cname}"' like '%${v}%'
                                        </foreach>
                                    </otherwise>
                                </choose>
                            </if>
                        </when>

                        <otherwise>
                            <choose>
                                <when test='item.operator.contains("like") '>
                                    val -> '$.${item.cname}' like '%${item.value}%'
                                </when>
                                <otherwise>
                                    JSON_CONTAINS( val ->'$.${item.cname}' , '"${item.value}"', '$')
                                </otherwise>
                            </choose>
                        </otherwise>

                    </choose>

                </foreach>
            </if>


        </where>

    </select>

 

 

2.Mapper.java 

List<Map<String,String>> pageFind(WorksheetDataSaveBean queryBean);

Long count(WorksheetDataSaveBean queryBean);

 

3.入參數據結構

public class WorksheetDataSaveBean {



    private Long dataId;

    private Long rowId;

    private List<WorksheetData> list;   //入參集合

    private List<WorksheetData> resultList;//結果列集合  要返回哪些列信息

    private List<WorksheetData> slaveList;//子表單查詢條件

    private Integer pageNum = 0;

    private Integer pageSize = 10;

 

public class WorksheetData {

    public static final Integer DATE_UNIT_SECOND = 1;

    public static final Integer DATE_UNIT_MINUTE = 2;

    public static final Integer DATE_UNIT_HOUR = 3;

    public static final Integer DATE_UNIT_DAY = 4;

    public static final Integer DATE_UNIT_MONTH = 5;

    public static final Integer DATE_UNIT_YEAR = 6;


    public static final String RELATED_OPERATOR_AND = "AND";

    public static final String RELATED_OPERATOR_OR = "OR";


    private Long id;

    private String cname;

    private String value;

    private String tableName;//子表單cname 對應的子表單列 在主表單中的列名 例如：table_0  table_1


    private String operator = "equals";//操作符  [equals] / [between and] / [like] /

    private String reOperator = RELATED_OPERATOR_AND;//查詢條件[條件內] 關聯符 AND（默認） OR    提供給select/checkbox/dept-user/dept-base使用

    private String endValue;//區間操作 結束區間值  提供給date/input-number 字段使用

    private Integer dateUnit = DATE_UNIT_DAY;// 按秒、分、時、天（默認）、月、年  提供給date字段查詢使用

    private String dateFormat;

    private List<String> valueList;//對checkbox、select 提供多值查詢功能




    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getCname() {
        return cname;
    }

    public void setCname(String cname) {
        this.cname = cname;
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
        initValueList();
    }

    public String getOperator() {
        return operator;
    }

    public void setOperator(String operator) {
        this.operator = operator;
    }

    public String getEndValue() {
        return endValue;
    }

    public void setEndValue(String endValue) {
        this.endValue = endValue;
    }

    public String getTableName() {
        return tableName;
    }

    public void setTableName(String tableName) {
        this.tableName = tableName;
    }

    public String getReOperator() {
        return reOperator;
    }

    public void setReOperator(String reOperator) {
        this.reOperator = reOperator;
    }

    public Integer getDateUnit() {
        return dateUnit;
    }

    public void setDateUnit(Integer dateUnit) {
        this.dateUnit = dateUnit;
        initDateFormat();
    }

    public String getDateFormat() {
        return dateFormat;
    }

    public void setDateFormat(String dateFormat) {
        this.dateFormat = dateFormat;
    }


    public List<String> getValueList() {
        return valueList;
    }

    public void setValueList(List<String> valueList) {
        this.valueList = valueList;
    }

    private String initDateFormat(){
        dateFormat = "'%Y-%m-%d %H:%i:%S'";
        switch (dateUnit){
            case 1:dateFormat = "'%Y-%m-%d %H:%i:%S'";break;
            case 2:dateFormat = "'%Y-%m-%d %H:%i'";break;
            case 3:dateFormat = "'%Y-%m-%d %H'";break;
            case 4:dateFormat = "'%Y-%m-%d'";break;
            case 5:dateFormat = "'%Y-%m'";break;
            case 6:dateFormat = "'%Y'";break;
            default:dateFormat = "'%Y-%m-%d'";
        }
        return dateFormat;
    }


    private void initValueList(){
        List<String> list = null;
        if (this.cname.contains("select")
                || this.cname.contains("checkbox")
                || this.cname.contains("dept-user")
                || this.cname.contains("dept-base")){

            String[] split = this.value.split(",");
            list = Arrays.asList(split);
        }

        this.valueList = list;
    }



}

 

4.controller

@RequestMapping(value = "/pageFindTableData",method = RequestMethod.POST,name="表單數據分頁全字段查詢")
    public PageResultBean<Map<String, Object>> pageFindTableData(@RequestBody WorksheetDataSaveBean bean){
        PageResultBean<Map<String, Object>> res  = new PageResultBean<>();

        Long dataId = bean.getDataId();
        int pageNum = bean.getPageNum();
        int pageSize = bean.getPageSize();
        pageNum = pageNum  * pageSize;
        bean.setPageNum(pageNum);

        /**
         * 1.表名驗證 + 列名驗證
         */

        if (dataId != null){
            String tableName = DDLCreater.TABLE_NAME+dataId;
            //表名驗證
            String exist = mapper.checkTableExist(tableName);
            if(StringUtils.isNotBlank(exist)){

                //列名驗證
                boolean flag = true;
                List<WorksheetData> paramList = bean.getList();
                if (paramList != null && paramList.size() > 0){
                    flag = checkColName(dataId,paramList,true);
                }


                /**
                 * 2.區分主表子表查詢條件 + DB查詢 + 組裝結果集
                 */
                if (flag){

                    //主子拆分
                    diffSlaveList(bean);

                    //DB查詢
                    List<Map<String, String>> maps = tableDataMapper.pageFind(bean);

                    //組裝結果
                    WorksheetPageFindMap map = new WorksheetPageFindMap();
                    List<Map<String, Object>> result = map.dealMap(maps);
                    //返回
                    res.initTrue(result,tableDataMapper.count(bean));


                }else {
                    res.initFalse("列名不合法");
                }
            }else {
                res.initFalse("數據表不存在");
            }
        }else {
            res.initFalse("必填參數缺失");
        }
        return res;
    }

 

檢查表是否存在的sql

<select id="checkTableExist" resultType="java.lang.String" parameterType="java.lang.String">
        SELECT
            table_name
        FROM
            information_schema.TABLES
        WHERE
            table_name = #{tableName};
    </select>

 

列名檢查 以及 區分主表和子表的查詢條件[因為主表是正常數據，子表是JSON數據，查詢方式不同，因此需要區分處理]

/**
     * 列名合法性檢查
     * [並處理 列名 加上``符號]
     *
     * =======處理列名注意=======
     * 只有主表單字段 需要處理列名
     * 子表單查詢字段 列名無需處理【json中查詢 字段不能帶 ``查詢】
     *
     *
     * @param dataId            dataId
     * @param paramList            入參列名集合
     * @param includeSlaveTable    是否包含子表單列
     * @return        列名是否合法
     */
    private boolean checkColName(Long dataId,List<WorksheetData> paramList,boolean includeSlaveTable){

        int size = paramList.size();
        WorksheetColBase check = new WorksheetColBase();
        check.setDataid(dataId);
        check.setState(includeSlaveTable ? null: 0);
        List<WorksheetColBase> byDataIdCheckList = mapper.findByDataId(check);


        for (WorksheetData data : paramList) {
            String colName = data.getCname();
            String tableName = data.getTableName();

            for (WorksheetColBase worksheetColBase : byDataIdCheckList) {
                if (colName.equals(worksheetColBase.getColName())){
                    String tableColName = worksheetColBase.getTableColName();
                    if (tableName == null){
                        if (tableName == tableColName){

                            //處理列名
                            data.setCname("`"+colName+"`");

                            size--;
                        }
                    }else {
                        if (tableName.equals(tableColName)){
                            size--;
                        }
                    }
                }
            }



        }

        return size == 0 ? true : false;
    }

    /**
     * 區分 子表單 查詢條件 和 主表查詢條件
     * @param bean
     */
    private  void diffSlaveList(WorksheetDataSaveBean bean){
        List<WorksheetData> list = bean.getList();    //入參查詢集合
        if (list != null ){
            List<WorksheetData> slaveList = new ArrayList<>(); //子表單查詢集合

            for (int i = 0; i < list.size(); i++) {
                WorksheetData data = list.get(i);
                String tableName = data.getTableName();
                if (tableName != null){
                    slaveList.add(data);
                    list.remove(data);

                    i--;
                }
            }

            bean.setSlaveList(slaveList);
        }

    }

 

 

組裝數據集的工具類

public class WorksheetPageFindMap {


    private Map<Long,Map<String,Object>> resultMap = new HashMap<>();

    private Long rowId;//行ID

    private Map<String,Object> rowMap;//行Map

    private List<Map<String,String>> slaveList;//子表單List

    private Map<String,String> slaveMap;//子表單Map




    public  List<Map<String, Object>> dealMap(List<Map<String,String>> list){
        for (Map<String, String> oldMap : list) {
            rowMap = new HashMap<>();
            slaveMap = new HashMap<>();


            Set<String> keySet = oldMap.keySet();
            for (String key : keySet) {
                String value = String.valueOf(oldMap.get(key));

                if (key.equals("id")){
                    rowId = Long.valueOf(value);
                    init();
                    append(key,rowId);
                }else {
                    if (key.contains("slaveTable_")){
                        dealSlaveMap(key.split("slaveTable_")[1],value);
                    }else {
                        if (key.contains("date")){
                            value = value.split("\\.")[0];
                        }
                        append(key,value);

                    }
                }
            }
            dealSlaveList();


        }

        List<Map<String, Object>> resultList = new ArrayList<>();
        for (Map<String, Object> stringObjectMap : resultMap.values()) {
            resultList.add(stringObjectMap);
        }
        return resultList;
    }

    //初始化行方法
    private void init(){
        Map<String, Object> oldRowMap = resultMap.get(rowId);
        if (oldRowMap != null){
            List<Map<String,String>> oldSlaveList = (List) oldRowMap.get("table");
            if (oldSlaveList != null){

                if (rowMap.get("table") == null){
                    slaveList = new ArrayList<>();
                }
                slaveList.addAll(oldSlaveList);
                append("table",slaveList);
            }
        }
        resultMap.put(rowId,rowMap);
    }


    //行數據追加方法
    private void append(String key,Object value){
        rowMap.put(key,value);
    }

    //子表單集合 初始化
    private void dealSlaveMap(String key,String value){
        slaveMap.put(key,value);
    }


    //子表單List 處理
    private void dealSlaveList(){

        //說明有子表單數據
        if (slaveMap.size() > 0 ){
            slaveList =   (List) rowMap.get("table");
            if (slaveList == null){
                slaveList = new ArrayList<>();
                append("table",slaveList);
            }
            slaveList.add(slaveMap);
        }
    }


}

 

 

最后conut ，拿到total，一起返回結果即可

 

 

 

 返回結果集