Jackson：名称为“默认引用”的多个反向引用属性

Question

我试图将一个json（字符串格式）映射到一个对象，但我得到以下错误

JSONMappingException：多个名为“default reference”的反向引用属性

这是json字符串

{"pledge":"74","client":"66","date":"","originId":"1","qualityId":"2","grade":"19","packing":"4","tons":"1000","fromDate":"","toDate":"","type":0,"remark":"","status":0,"area":"1531","id":-1,"refNumber":"","log":"","user":""}

@Entity
@Table(name="movement", catalog = "wsmill3")
public class MovementView implements java.io.Serializable {
    private Integer id;
    private Integer originId;
    private Integer qualityId;
    private String refNumber;
    private Integer client;
    private String clientRef;
    private Integer grade;
    private Integer packing;
    private Integer pledge;
    private Integer area;
    private Date date;
    private Double tons;
    private Date fromDate;
    private Date toDate;
    private String remark;
    private User user;
    private Byte status;
    private String log;
    private Byte type;
    //constructor, getter and setter

String data = request.getParameter("data");
ObjectMapper mapper = new ObjectMapper();
MovementView movement = mapper.readValue(data, MovementView.class);

我不知道这个错误，我做了完全相同的方式，我读杰克逊的主页。知道这件事的人请帮帮我

Answer 1

如果您在项目中对多个getter/setter方法使用@JsonBackReference，则应该使用特定的引用名称来区分它们。

在最新版本中可能只允许一个“default reference'？

例如：

@JsonBackReference(value="user-movement")
public User getUser() {
    return user;
}

@JsonManagedReference(value="user-movement")
public MovementView getMovementView() {
    return movementView;
}