Java 将SQLquery映射到普通对象，而不是实体

我有以下Java方法：

public void loadData()
{
  session = DaoSF.getSessionFactory().openSession();
  String sql = "select s.column1, SUM(s.column2), 'hi' as column3 from Source s group by s.column1";
  Query query = session.createSQLQuery(sql).addEntity(Test.class);
  dataList = query.list();
}

@Entity
@Table(name="SourceTable")
public class Source implements Serializable 
{
  @Id
  private int column1;
  private int column2;
  + getters and setters
}

@Entity  // why?
public class Test implements Serializable 
{
  @Id
  private int column1;
  private int column2;
  private String column3;
  + getters and setters
}

...
<mapping class="objects.Test"/> // why?
<mapping class="tables.Source"/>
...

类源：

public void loadData()
{
  session = DaoSF.getSessionFactory().openSession();
  String sql = "select s.column1, SUM(s.column2), 'hi' as column3 from Source s group by s.column1";
  Query query = session.createSQLQuery(sql).addEntity(Test.class);
  dataList = query.list();
}

@Entity
@Table(name="SourceTable")
public class Source implements Serializable 
{
  @Id
  private int column1;
  private int column2;
  + getters and setters
}

@Entity  // why?
public class Test implements Serializable 
{
  @Id
  private int column1;
  private int column2;
  private String column3;
  + getters and setters
}

...
<mapping class="objects.Test"/> // why?
<mapping class="tables.Source"/>
...

适当的类测试：

public void loadData()
{
  session = DaoSF.getSessionFactory().openSession();
  String sql = "select s.column1, SUM(s.column2), 'hi' as column3 from Source s group by s.column1";
  Query query = session.createSQLQuery(sql).addEntity(Test.class);
  dataList = query.list();
}

@Entity
@Table(name="SourceTable")
public class Source implements Serializable 
{
  @Id
  private int column1;
  private int column2;
  + getters and setters
}

@Entity  // why?
public class Test implements Serializable 
{
  @Id
  private int column1;
  private int column2;
  private String column3;
  + getters and setters
}

...
<mapping class="objects.Test"/> // why?
<mapping class="tables.Source"/>
...

和休眠映射：

public void loadData()
{
  session = DaoSF.getSessionFactory().openSession();
  String sql = "select s.column1, SUM(s.column2), 'hi' as column3 from Source s group by s.column1";
  Query query = session.createSQLQuery(sql).addEntity(Test.class);
  dataList = query.list();
}

@Entity
@Table(name="SourceTable")
public class Source implements Serializable 
{
  @Id
  private int column1;
  private int column2;
  + getters and setters
}

@Entity  // why?
public class Test implements Serializable 
{
  @Id
  private int column1;
  private int column2;
  private String column3;
  + getters and setters
}

...
<mapping class="objects.Test"/> // why?
<mapping class="tables.Source"/>
...

---

它不一定是，但是您已经通过使用它作为hibernate调用的结果，显式地将它标记为实体

你应该做的是这样写

Query query = session.createSQLQuery(sql).setResultTransformer(Transformers.aliasToBean(Test.class));

---

在后一种情况下，您的测试类应该是一个普通的POJO，其属性与select列匹配

谢谢，但我现在有一个报告：

org.hibernate.MappingException:JDBC类型没有方言映射：-15

这意味着基础类型无法映射到Java类型，您可以使用标量方法，或者通过使用自定义方言添加映射，在这里阅读更多内容非常感谢，我明天将尝试它WNP，希望它能帮助您