Java 如何返回非实体对象的列表并添加一个自定义变量，该变量将从hibernate查询中的属性文件中获取？

我需要返回一个CustomEmployee列表，其中我需要从属性文件中提取一个参数

我需要从实体员工查询CustomEmployee的所有其他参数

我的员工类别：

@Data
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(name="EMPLOYEE")
public class Employee implements Serializable{

    private static final long serialVersionUID = 1859692418829710098L;

    @Id
    public Long id;

    public String name;
    public long salary;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class CustomEmployee{

    public String name;
    public long salary;
    public String extra;
}

CustomEmployee类别：

@Data
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(name="EMPLOYEE")
public class Employee implements Serializable{

    private static final long serialVersionUID = 1859692418829710098L;

    @Id
    public Long id;

    public String name;
    public long salary;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class CustomEmployee{

    public String name;
    public long salary;
    public String extra;
}

我查询的服务：

@PersistenceContext
    private EntityManager entityManager;



    public List<CustomEmployee> retrieveCustomEmployee(){

        String dummy ="dummy"; //to be pulled from properties file

        String query = "SELECT new com.example.office.dto.CustomEmployee(" + 
        " emp.name, emp.salary, "+ dummy +" AS extra"+")"+" FROM Employee emp";

        TypedQuery<CustomEmployee> typeQuery = entityManager.createQuery(query, CustomEmployee.class);
        System.out.println("######"+ typeQuery.getResultList());

        return typeQuery.getResultList();

    }

你能指导我修理这个吗

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谢谢。

看起来你可以用这个

String queryString = "SELECT NEW com.example.office.dto.CustomEmployee(" + 
    " emp.name, emp.salary, "+ dummy +" AS extra"+")"+" FROM Employee emp";
Query query = em.createQuery(queryString);
List<CustomEmployee> employees = query.getResultList();

String queryString=“选择新建com.example.office.dto.CustomEmployee（”+
“emp.name，emp.salary，“+dummy+”作为额外的“+””+“来自员工emp”；
Query Query=em.createQuery（queryString）；
List employees=query.getResultList（）；

要解决第一个问题，我认为您只需在引号之间添加虚拟变量。如下图所示：

String query = "SELECT new com.example.office.dto.CustomEmployee(" + 
        " emp.name, emp.salary, '"+ dummy +"' AS extra"+")"+" FROM Employee emp";

---

我认为有两种可能性。第一个，lombok以不同的顺序生成构造函数，或者第二个，数据库中的工资字段不是数字。