我试图将一个json(字符串格式)映射到一个对象,我得到以下错误
com.fasterxml.jackson.databind.JsonMappingException: Multiple
back-reference properties with name ‘defaultReference’
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":""}
这是对象
@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
这是做映射的代码
String data = request.getParameter("data");
ObjectMapper mapper = new ObjectMapper();
MovementView movement = mapper.readValue(data,MovementView.class);
我不知道这个错误,我做的确和我在杰克逊主页上看到的一样.任何知道的人,请帮助我
解决方法
如果在项目中的getter / setter方法中使用@JsonBackReference两次以上,那么您应该将它们与特定的引用名称进行区分.在最新版本中只允许使用一个“defaultReference”.
例如
在MovementView.class
@JsonBackReference(value="user-movement")
public User getUser() {
return user;
}
在User.class
@JsonManagedReference(value="user-movement")
public User getMovementView() {
return movementView;
}
