在 Spring MVC 中，使用 HQL JOIN 我多次获得相同的数据

Question

在这里，我加入两个表并在 List<Confrenceresponse> 中获取它，但我不知道为什么我的所有列表在多个时间只提供第一个数据（列表的大小通过查询获得）。

  public List<ConferenceResponse> getConferenceResponse(long listId) {
    String hql = "select e.contact as contact, e.name as name, e.ueId as ueId, c.created as created from ExcelDatas e left join 
    channels c on e.contact=c.cid_num where e.ueId = "+listId;
    List<ConferenceResponse> confRe =(List<ConferenceResponse>)getSession().createNativeQuery(hql, ConferenceResponse.class).getResultList();

      for(ConferenceResponse cr:confRe) {
         System.out.println("Name "+cr.getName());
      }
    getSession().flush();
    return confRe;
}

Here, if I am getting 3 join data from table I get first data repeated three times. Can any one solve this? Thanks.

Answer 1

将您的 HQL 更改为以下。此外，HQL 不支持关键字。

String hql = "select e.contact as contact, e.name as name, e.ueId as ueId, c.created as created from ExcelDatas e left join 
   e.contact c where e.ueId = "+listId;

如果您在实体 class 中没有关系，则需要按如下方式进行交叉连接。

String hql = "select e.contact as contact, e.name as name, e.ueId as ueId, c.created as created from ExcelDatas e,channels c where e.contact=c.cid_num and e.ueId = "+listId;

在 Spring MVC 中，使用 HQL JOIN 我多次获得相同的数据

In Spring MVC, using HQL JOIN i am getting same Data in multiple time

java

spring

hibernate

spring-mvc

hibernate-mapping