使用本机查询时如何在 Spring Data Jpa 中获取 Page<Object[]> 之类的东西

Question

我卡在了一个点上。我有一个正在使用的查询，如下所示

@Query(value="SELECT bha.activity_code_id, ac.activity_code_full_name, pt.plan_name " + 
        " FROM bp_bid_history_activity bha, activity_code ac, plan_template pt where rownum < 201", nativeQuery = true)
List<Object[]> getContractReceivedAddedActivityCodes(@Param("bidId")Long bidId, @Param("historyId")Long historyId, Pageable pageable);

// Trying to achieve this
@Query(value="SELECT bha.activity_code_id, ac.activity_code_full_name, pt.plan_name " + 
        " FROM bp_bid_history_activity bha, activity_code ac, plan_template pt where rownum < 201", nativeQuery = true)
Page<Object[]> getContractReceivedAddedActivityCodesPageable(@Param("bidId")Long bidId, @Param("historyId")Long historyId, Pageable pageable);

实际上为了查看结果，我将查询限制为 200 个结果。因为实际查询不是 return 结果。在实际查询中有适当的 where 子句。但无论如何。

下面是我的使用方法

//@Test
public void getContractReceivedAddedActivityCodes() {

    Long bidId = 178820L;
    Long historyId = 783520L;

    Pageable pageable = PageRequest.of(0, 10, Sort.by("activity_code_id"));

    List<Object[]> addedActivitiesList  = bpBidActivityRepository.getContractReceivedAddedActivityCodes(bidId, historyId, pageable);
    List<ContractReceivedActivityCodesModel> addedActivityCodes =  getContractReceivedActivityCodesModel(addedActivitiesList);
    printList(addedActivityCodes);

}

private List<ContractReceivedActivityCodesModel> getContractReceivedActivityCodesModel(List<Object[]> activitiesList) {

    List<ContractReceivedActivityCodesModel> activityCodes = null;
    if (CollectionUtils.isNotEmpty(activitiesList)) {
        activityCodes = activitiesList.stream()
                .map(ContractReceivedActivityCodesModel::new).collect(Collectors.toList()); 
    }
    return activityCodes;
}

public class ContractReceivedActivityCodesModel {
    private Long activeCodeId;
    private String activityCodeFullName;
    private String planName;

    public ContractReceivedActivityCodesModel(Object[] object) {
        if (ArrayUtils.isNotEmpty(object)) {
            BigDecimal activeCodeId = (BigDecimal) object[0];
            if (activeCodeId != null) {
                this.activeCodeId = activeCodeId.longValue();
            }

            this.activityCodeFullName = (String) object[1];
            this.planName = (String) object[2];
        }
    }
}

查询 return 有 200 个结果。现在的问题是，当 List<Object[]> 查询运行时，我只得到 10 个结果。因为我传递的是 10 页大小。但我也想获得总记录大小。所以我可以在 UI 上显示分页，显示 200 条记录中的 10 条，显示 200 条记录中的 30 条。

当我们使用 Page<Person> 或 Page<T> return 类型时，我们也会得到总计数。在这种情况下我怎样才能得到总数。或者我想得到像 Page<Object[]> 这样的东西。我尝试了 Page<List<Object[]>>、Page<Object[]> 之类的操作，但出现错误。

谢谢

Answer 1

您必须提供一个 countQuery

@Query(value="SELECT bha.activity_code_id, ac.activity_code_full_name, pt.plan_name " + 
        " FROM bp_bid_history_activity bha, activity_code ac, plan_template pt where rownum < 201", 
countQuery="SELECT count(*) " + 
        " FROM bp_bid_history_activity bha, activity_code ac, plan_template pt where rownum < 201"
nativeQuery = true)
Page<Object[]> getContractReceivedAddedActivityCodesPageable(@Param("bidId")Long bidId, @Param("historyId")Long historyId, Pageable pageable);

使用本机查询时如何在 Spring Data Jpa 中获取 Page<Object[]> 之类的东西

How to get Page<Object[]> like stuff in Spring Data Jpa when using native query

hibernate

spring-data-jpa

jpa-2.1