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我想將一個嵌套的JSON對象反序列化爲使用Jackson 1.9的POJO,但是我遇到了麻煩。下面是我正在嘗試解析的示例JSON字符串的類。反序列化和多個反向引用屬性的名稱爲'defaultReference'
(getter和setter略)
JSON字符串:
sellerJson = "[{\"id\":\"1\",\"first_name\":\"Joe\",\"last_name\":\"Sellerman\",\"company\":\"NY CANYON RANCH\"," +
"\"prorated_sellers\":[{\"first_name\":\"Steve\",\"last_name\":\"Jobs\",\"company\":\"NY CANYON RANCH\"}," +
"{\"first_name\":\"Lorne\",\"last_name\":\"Michaels\",\"company\":\"NY CANYON RANCH\"}]," +
"\"pens\":[{\"id\":\"2\",\"pen_no\":\"902\"}]}]";
Java類:
@Table(name="seller")
public class SellerModel implements Serializable, Comparable<SellerModel> {
private static final long serialVersionUID = 201302111531L;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(name="id")
private Integer id;
@Column()
private String first_name;
@Column()
private String last_name;
@Column()
private String company;
@Column()
private Boolean is_prorated;
@JsonIgnore
@ManyToOne()
@JoinColumn(name="parent_seller_id", referencedColumnName="id")
private SellerModel parent_seller;
@JsonManagedReference(value="seller-prorated")
@OneToMany(mappedBy = "parent_seller", cascade={CascadeType.ALL}, orphanRemoval=true)
private List<SellerModel> prorated_sellers;
@JsonManagedReference(value="seller-pen")
@OneToMany(mappedBy = "parent_seller", cascade={CascadeType.ALL}, orphanRemoval=true)
private List<PenModel> pens;
}
@Table(name="pen")
public class PenModel implements Serializable, Comparable<PenModel> {
private static final long serialVersionUID = 201302111537L;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(name="id")
private Integer id;
@Column()
private String pen_no;
@JsonBackReference(value="pen-seller")
@ManyToOne()
@JoinColumn(name="parent_seller_id", referencedColumnName="id")
private SellerModel parent_seller;
@JsonManagedReference(value="pen-livestock")
@OneToMany(mappedBy = "parent_pen", cascade={CascadeType.ALL}, orphanRemoval=true)
private List<LivestockModel> livestock;
}
然而,當我嘗試執行反序列化:
List<SellerModel> sellers = (List<SellerModel>) mapper.readValue(sellerJson,
mapper.getTypeFactory().constructCollectionType(List.class, SellerModel.class));
我收到以下異常消息:
java.lang.IllegalArgumentException異常:多次向後引用屬性 名爲「defaultReference」
,我讀了提供(值=「的東西,獨特的」)註解屬性應該解決這個問題,但我沒有任何運氣。有沒有人有什麼建議?