Question

我按如下方式创建了一个类......

public class BeanA{
  private String customerId;
  private String cutomerName;
  private Map<String, SubMarket> subMarkets = new HashMap<>();

   public String getCustomerId() {
    return customerId;
   }

   public void setCustomerId(String customerId) {
    this.customerId = customerId;
   }

   public String getCutomerName() {
    return cutomerName;
   }

   public void setCutomerName(String cutomerName) {
    this.cutomerName = cutomerName;
   }

   public Map<String, String> getSubMarkets() {
    return subMarkets;
   }

   public void setSubMarkets(Map<String, String> subMarkets) {
    this.subMarkets = subMarkets;
   }
}

我也做了hibernate映射。

完全有效。

现在我想获得结果集，其中[Map]键=某个值和值=某个值...

我希望有一个hibernate查询来获取结果集。

Answer 1

JPQL查询如下

SELECT a FROM BeanA a JOIN a.subMarkets s 
WHERE KEY(s) = :some AND VALUE(s) = : someOther

假设Hibernate版本是固定HHH-5396的版本。

Answer 2

您可以将数据加载为这样的地图：

Hibernate doc示例：

select 
    new map(
        max(bodyWeight) as max,
        min(bodyWeight) as min, count(*) as n 
    ) 
from Cat cat

http://docs.jboss.org/hibernate/orm/3.3/reference/en/html/queryhql.html#queryhql-select

Answer 3

我最终得到了正确答案：

 from [tableName]C where 'test' in indices(C.[mapName]) and 'Success' in elements(C.[mapName])

Hibernate查询以下场景

3 个答案: