Question

我正在尝试从使用spring boot和hibernate进行此项目的数据库中获取员工列表。据我说，我做对了所有事情，但我遇到了这个丑陋的例外

org.hibernate.hql.internal.ast.QuerySyntaxException: Employee is not mapped [from Employee];

我几乎尝试了互联网上的所有解决方案，有人建议POJO名称和查询中使用的名称必须相同，而我也这样做了。

@Entity
@Table(name="employee")
public class Employee {

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id")
    private int id;

    @Column(name="first_name")
    private String firstName;

    @Column(name="last_name")
    private String lastName;

    @Column(name="email")
    private String email;

    public Employee() {

    }

    public Employee(String firstName, String lastName, String email) {

        this.firstName = firstName;
        this.lastName = lastName;
        this.email = email;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    @Override
    public String toString() {
        return "Employee [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", email=" + email + "]";
    }


}

@Repository
public class EmployeeDaoImpl implements EmployeeDao {

    @Autowired
    private EntityManager entity;

    @Override
    @Transactional
    public List<Employee> ListAllEmployee() {

        //create Session
        Session session=entity.unwrap(Session.class);

        Query<Employee> employee=session.createQuery("from Employee",Employee.class);
        return employee.getResultList();
    }

}

Answer 1

仅当您在查询中提到的表名与实体不匹配时，才会出现此问题。查询中使用的表名不是真实数据库中的表名，它应该是实体类的名称。如果您试图映射到数据库表并且实际的实体类名称不同，则会抛出此错误。另外请注意，查询字符串应具有与实体类名称完全相同的大小写（大写或小写）。

org.hibernate.hql.internal.ast.QuerySyntaxException：员工未映射（来自Employee）；

1 个答案: