Jpa 错误@OneToOne或@ManyToOne引用了未知实体

我收到如下错误，我不知道为什么

原因：org.hibernate.AnnotationException:@OneToOne或@ManyToOne on（开）on（开）on（开）on（开）on（开）on（开）on（开）on（开）on（开）on（开）on（开）on（开）on（开）on（开）on（开） 实体：java.lang.Long

课程订单

@Entity
public class Orders {
  @Id
  @GeneratedValue
  private Long orderid;
  @JoinColumn(name = "customerid", referencedColumnName = "CustomerID")
  @ManyToOne
  private Long customerid;
  @JoinColumn(name = "employeeid", referencedColumnName = "EmployeeID")
  @ManyToOne
  private Long employeeid;
  private java.sql.Timestamp orderdate;
  private java.sql.Timestamp requireddate;
  private java.sql.Timestamp shippeddate;
  @JoinColumn(name = "shipperid", referencedColumnName = "ShipperID")
  @ManyToOne
  private Long shipvia;
  private Double freight;
  private String shipname;
  private String shipaddress;
  private String shipcity;
  private String shipregion;
  private String shippostalcode;
  private String shipcountry;

  @OneToMany(mappedBy="orderid")
  private List<OrderDetails> orderDetails;

@Entity
public class Orders {
  @Id
  @GeneratedValue
  private Long orderid;
  @JoinColumn(name = "customerid", referencedColumnName = "CustomerID")
  @ManyToOne
  private Customers customerid;
  @JoinColumn(name = "employeeid", referencedColumnName = "EmployeeID")
  @ManyToOne
  private Employees employeeid;
  private java.sql.Timestamp orderdate;
  private java.sql.Timestamp requireddate;
  private java.sql.Timestamp shippeddate;
  @JoinColumn(name = "shipperid", referencedColumnName = "ShipperID")
  @ManyToOne
  private Shippers shipvia;
  private Double freight;
  private String shipname;
  private String shipaddress;
  private String shipcity;
  private String shipregion;
  private String shippostalcode;
  private String shipcountry;

  @OneToMany(mappedBy="orderid")
  private List<OrderDetails> orderDetails;

@实体
公共阶级秩序{
@身份证
@生成值
私有长orderid；
@JoinColumn（name=“customerid”，referencedColumnName=“customerid”）
@许多酮
私人长客户ID；
@JoinColumn（name=“employeeid”，referencedColumnName=“employeeid”）
@许多酮
私人长期雇员ID；
private java.sql.Timestamp orderdate；
私有java.sql.Timestamp requireddate；
私有java.sql.Timestamp shippeddate；
@JoinColumn（name=“shipperid”，referencedColumnName=“shipperid”）
@许多酮
私人长船；
私人双重运费；
私有字符串shipname；
私有字符串地址；
私人城市；
私人区域；
专用字符串shippestalcode；
私人船舶国家；
@OneToMany（mappedBy=“orderid”）
私人名单详情；

类客户

@Entity
public class Customers {
  @Id
  @GeneratedValue
  private Long customerid;
  private String companyname;
  private String contactname;
  private String contacttitle;
  private String address;
  private String city;
  private String region;
  private String postalcode;
  private String country;
  private String phone;
  private String fax;

  @OneToMany(mappedBy="customerid")
  private List<Orders> orders;

@实体
公共类客户{
@身份证
@生成值
私人长客户ID；
私有字符串companyname；
私有字符串contactname；
私有字符串名称；
私有字符串地址；
私人城市；
私有字符串区域；
专用字符串后代码；
私人国家；
私人电话；
私人字符串传真；
@OneToMany（mappedBy=“customerid”）
私人名单订单；

这里描述了这两个实体之间的关系

---

请解释我做错了什么？

我在问了这个问题后找到了原因，我为给您带来的不便表示歉意。正如您所看到的，我忘了更改customerid的类型，它应该如下所示

课程订单

@Entity
public class Orders {
  @Id
  @GeneratedValue
  private Long orderid;
  @JoinColumn(name = "customerid", referencedColumnName = "CustomerID")
  @ManyToOne
  private Long customerid;
  @JoinColumn(name = "employeeid", referencedColumnName = "EmployeeID")
  @ManyToOne
  private Long employeeid;
  private java.sql.Timestamp orderdate;
  private java.sql.Timestamp requireddate;
  private java.sql.Timestamp shippeddate;
  @JoinColumn(name = "shipperid", referencedColumnName = "ShipperID")
  @ManyToOne
  private Long shipvia;
  private Double freight;
  private String shipname;
  private String shipaddress;
  private String shipcity;
  private String shipregion;
  private String shippostalcode;
  private String shipcountry;

  @OneToMany(mappedBy="orderid")
  private List<OrderDetails> orderDetails;

@Entity
public class Orders {
  @Id
  @GeneratedValue
  private Long orderid;
  @JoinColumn(name = "customerid", referencedColumnName = "CustomerID")
  @ManyToOne
  private Customers customerid;
  @JoinColumn(name = "employeeid", referencedColumnName = "EmployeeID")
  @ManyToOne
  private Employees employeeid;
  private java.sql.Timestamp orderdate;
  private java.sql.Timestamp requireddate;
  private java.sql.Timestamp shippeddate;
  @JoinColumn(name = "shipperid", referencedColumnName = "ShipperID")
  @ManyToOne
  private Shippers shipvia;
  private Double freight;
  private String shipname;
  private String shipaddress;
  private String shipcity;
  private String shipregion;
  private String shippostalcode;
  private String shipcountry;

  @OneToMany(mappedBy="orderid")
  private List<OrderDetails> orderDetails;

@实体
公共阶级秩序{
@身份证
@生成值
私有长orderid；
@JoinColumn（name=“customerid”，referencedColumnName=“customerid”）
@许多酮
私人客户客户ID；
@JoinColumn（name=“employeeid”，referencedColumnName=“employeeid”）
@许多酮
私人雇员雇员ID；
private java.sql.Timestamp orderdate；
私有java.sql.Timestamp requireddate；
私有java.sql.Timestamp shippeddate；
@JoinColumn（name=“shipperid”，referencedColumnName=“shipperid”）
@许多酮
私人托运人托运人；
私人双重运费；
私有字符串shipname；
私有字符串地址；
私人城市；
私人区域；
专用字符串shippestalcode；
私人船舶国家；
@OneToMany（mappedBy=“orderid”）
私人名单详情；

我最近出现了此错误，但实体未知

Initial SessionFactory creation failed.org.hibernate.AnnotationException: @OneToOne or @ManyToOne on XXXX.Terminal.location references an unknown entity: XXXX.dc.Location
Feb 06, 2020 11:51:38 AM org.apache.catalina.core.StandardContext listenerStart

在我的例子中，我必须将这个实体的映射添加到“hibernate.cfg.xml”

---

谢谢，我也犯了同样的错误。。。