使用Jackson和Spring Boot的JPA实体中的循环引用 [英] Circular reference in entity JPA with Jackson and Spring Boot

问题描述

我有两个Web服务:"Proprietario"和"Veiculo"，"Proprietario"包含"Veiculo"的列表，"Veiculo"包含"Proprietario".

I have two web services: "Proprietario" and "Veiculo", the "Proprietario" contains a list of "Veiculo" and "Veiculo" contains a "Proprietario".

问题是，当我发出调用"Proprietario"的findAll方法的请求时，尝试进行序列化时，Jackson进入了无限循环抛出异常.当我尝试调用"Veiculo"的findAll方法时，也会发生同样的情况.

The problem is that when I make a request calling the findAll method of "Proprietario", when trying to serialize, Jackson goes into infinite loop throwing exception. The same happens when I try to call the findAll method of "Veiculo".

当我打电话给您致电"Veiculo"的findAll并携带"Proprietario"，但不将"Veiculo"列表带入"Proprietario"中时，我希望这样做.与我调用"Proprietario"的findAll方法相反，我想带"Veiculo"列表，但不要将"Proprietario"带到"Veiculo".

I would like it when I call you to call the findAll of the "Veiculo", bring along the "Proprietario", but do not bring the "Veiculo" list inside the "Proprietario". The opposite of when I call the findAll method of "Proprietario", I'd like to bring the "Veiculo" list, but do not bring the "Proprietario" into the "Veiculo".

我尝试使用一些Jackson注释，但是没有一个可以解决双方的冲突.

I tried to use some Jackson annotations, but none solves the conflict on both sides.

@Getter
@Setter
@Entity
@EqualsAndHashCode(of = "id")
public class Veiculo {

    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    private Long id;

    @Column(length = 10)
    private String placa;

    @Column(nullable = false)
    private Integer ano;

    @ManyToOne
    @JoinColumn
    private Proprietario proprietario;
}


@Getter
@Setter
@Entity
@EqualsAndHashCode(of = "id")
public class Veiculo {

    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    private Long id;

    @Column(length = 10)
    private String placa;

    @Column(nullable = false)
    private Integer ano;

    @ManyToOne
    @JoinColumn
    private Proprietario proprietario;
}

推荐答案

尝试使用这两个注释 @JsonManagedReference and @JsonBackReference

Try using these two annotations @JsonManagedReference and @JsonBackReference

请参见 http://www.baeldung.com/jackson-双向关系和无限递归

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