使用jpa和hibernate的JoiningTables问题是mulitmapping失败

Question

     @Entity
     @Table(name="booking")
     public class Booking implements Serializable {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private int reservationId;
     private String stateroomType;
     private double totalAmount;
     private int totalGuests;   
     private int shipId;
     private int passId;

  //Joining Tables
  @OneToOne
  @JoinColumn(name="passId")
  private Passenger passenger;

  @ManyToOne
  @JoinColumn(name="shipId")
  private Cruise cruise;

    @Entity
     @Table(name = "shipcruise")
    public class Cruise implements Serializable {


    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int cruiseId;
    private String cruiseName;
    private LocalDate startDate;
    private LocalDate endDate;
    private Timestamp destination;

    @Entity
    @Table(name = "passengers")
    public class Passenger implements Serializable{

    @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int passengerId;
    private String userName;
    private String firstname;
    private String lastname;
    private String address;
    private String city;
    private String country;
    private String postalCode;
    private String password;

当我运行我的项目时，我得到以下错误消息：

异常[EclipseLink-48]（Eclipse Persistence Services-2.5.2.v20140319-9AD6ABD):org.Eclipse.Persistence.exceptions.Description异常描述：字段[booking.shipid]存在多个可写映射。只有一个可以定义为可写，所有其他的都必须指定为只读。映射:org.Eclipse.Persistence.mappings.oneToonemapping[cruise]描述符:RelationalDescriptor(com.springmvc.jpa.booking.booking-->[databaseTable(booking)])异常[EclipseLink-48]（Eclipse Persistence Services-2.5.v20140319-9ad6abd):org.Eclipse.Persistence.Exception异常描述：字段[booking.passid]存在多个可写映射。只有一个可以定义为可写，所有其他的都必须指定为只读。映射:org.eclipse.persistence.mappings.oneTooneMapping[passer]descriptor:RelationalDescriptor(com.springmvc.jpa.booking.booking-->[databaseTable(booking)])

...............................................................................................

数据库表：

      CREATE TABLE `booking` (
     `reservationId` int NOT NULL,
     `stateroomType` varchar(30) NOT NULL,
     `totalGuests` int NOT NULL,
     `totalAmount` decimal(10,2) NOT NULL,
     `passId` int DEFAULT NULL,
     `shipId` int DEFAULT NULL,
      PRIMARY KEY (`reservationId`),
      KEY `passId` (`passId`),
      KEY `shipId` (`shipId`),
      CONSTRAINT `booking_ibfk_1` FOREIGN KEY (`passId`) REFERENCES 
      `passengers` (`passengerId`),
      CONSTRAINT `booking_ibfk_2` FOREIGN KEY (`shipId`) REFERENCES 
      `shipcruise` (`cruiseId`)
       ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;

      CREATE TABLE `passengers` (
     `passengerId` int NOT NULL AUTO_INCREMENT,
     `userName` varchar(50) DEFAULT NULL,
     `password` varchar(25) DEFAULT NULL,
     `firstname` varchar(30) DEFAULT NULL,
     `lastname` varchar(30) DEFAULT NULL,
     `address` varchar(255) DEFAULT NULL,
    `city` varchar(25) DEFAULT NULL,
    `postalCode` varchar(10) DEFAULT NULL,
     `country` varchar(20) DEFAULT NULL,
     PRIMARY KEY (`passengerId`)
     ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 
   COLLATE=utf8mb4_0900_ai_ci;

    CREATE TABLE `shipcruise` (
   `cruiseId` int NOT NULL AUTO_INCREMENT,
   `CruiseName` varchar(50) DEFAULT NULL,
   `shipName` varchar(50) DEFAULT NULL,
  `startDate` date NOT NULL,
  `endDate` date NOT NULL,
   `destination` timestamp NOT NULL,
   PRIMARY KEY (`cruiseId`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;

Answer 1

预订实体。

 @Entity
 @Table(name="booking")
 public class Booking implements Serializable {
 @Id
 @GeneratedValue(strategy = GenerationType.IDENTITY)
 private Integer reservationId;
 private String stateroomType;
 private double totalAmount;
 private int totalGuests;   

 //Joining Tables
 @ManyToOne
 @JoinColumn(name="passId")
 private Passenger passenger;

 @ManyToOne
 @JoinColumn(name="shipId")
 private Cruise cruise;

巡航实体。

@Entity
@Table(name = "shipcruise")
public class Cruise implements Serializable {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer cruiseId;
private String cruiseName;
private LocalDate startDate;
private LocalDate endDate;
private Timestamp destination;

乘客实体。

@Entity
@Table(name = "passengers")
public class Passenger implements Serializable{

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer passengerId;
private String userName;
private String firstname;

 private int shipId;
 private int passId;

  //Joining Tables
  @OneToOne
  @JoinColumn(name="passId")
  private Passenger passenger;

  @ManyToOne
  @JoinColumn(name="shipId")
  private Cruise cruise;