MyBatisplus 使用IPage和Page分页

@RequestMapping(value = "/cityList",method =RequestMethod.POST)
    public ResponseVo<IPage<GovernanceRegulationClosePo>> querySearchCityDataList(@RequestBody Map<String,Object>map){

        IPage<GovernanceRegulationClosePo> page=governanceRegulationCloseService.getCityDataList(map);

        return new ResponseVo<>(true,page,UnicomResponseEnums.SUCCESS_OPTION);
    }

 IPage<GovernanceRegulationClosePo> getCityDataList(Map<String, Object> map);

@Override
    public IPage<GovernanceRegulationClosePo> getCityDataList(Map<String, Object>map) {
        String countyName = (String) map.get("countyName");
        String regionCode = (String) map.get("regionCode");
        Integer pageNum = (Integer) map.get("pageNum");
        Integer pageSize = (Integer) map.get("pageSize");
        String subRegionCode=regionCode.substring(0,4);

        Page<GovernanceRegulationClosePo> page=new Page<>(pageNum,pageSize);

        IPage<GovernanceRegulationClosePo> iPage=governanceRegulationCloseMapper.getCityDataList(page,countyName,subRegionCode);

        returniPage;
    }

IPage<GovernanceRegulationClosePo> getCityDataList(Page<GovernanceRegulationClosePo> page, @Param("countyName") String countyName,@Param("subRegionCode") String subRegionCode);

    <select   resultType="com.huitian.mine.domain.vo.GovernanceRegulationCloseVo">SELECT
        b.COUNTY_NAME,b.REGION_CODE,COUNT(MINE_NUMBER) AS count ,SUM(DAMAGED_AREA) AS sumDamagedArea ,SUM(PLAN_REPAIR_AREA) AS sumPlanRepairedArea ,SUM(REPAIRED_AREA) AS sumRepairedArea ,SUM(CAPITAL_USAGE) AS sumCapitalUsage
        FROM B_MINEREPAIRPROGRESSCLOSE b
        <if test="countyName!=''and countyName!=null">WHERE b.COUNTY_NAME=#{countyName}
        </if>GROUP BY b.COUNTY_NAME,b.REGION_CODE
        HAVING b.REGION_CODE LIKE CONCAT(#{subRegionCode},'%')
    </select>

public classGovernanceRegulationCloseVo {
     /*** 区县名称
      */
     privateString countyName;
     /*** 所属行政区编码
      */
     privateString regionCode;
     /*** 矿山总数
      */
     privateInteger count;
     /*** 总损毁面积
      */
     privateLong sumDamagedArea;
     /*** 总拟修复面积
      */
     privateLong sumPlanRepairedArea;
     /*** 总已修复面积
      */
     privateLong sumRepairedArea;
     /*** 总使用资金
      */
     privateDouble sumCapitalUsage;



}