JsonBackReference无法按预期工作

Question

我有接下来的两个字段......

A类

@Entity
@Table(name="ClassA")
public class ClassA 
{
    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "Id", unique = true, nullable = false)
    private Long id;

    @Column(name = "Name", nullable = false, length = 50)
    private String name;

    @JsonManagedReference
    @OneToMany(mappedBy="classA")
    private List<ClassB> classBList;
}

B类

@Entity
@Table(name = "ClassB")
public class ClassB 
{
    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "Id", unique = true, nullable = false)
    private Long id;

    @Column(name = "Name", nullable = false, length = 50)
    private String name;

    @JsonBackReference
    @ManyToOne
    @JoinColumn(name = "ClassAId", nullable = false)
    private ClassA classA;  
}

当我使用REST从数据库中获取所有ClassA记录时，结果就像魅力一样：

获取http://localhost:8080/REST/ClassA

[
{
    "id": 1,
    "name": "VVVV I",
    "classB": [
        {
            "id": 1,
            "name": "SSSS I"
        },
        {
            "id": 2,
            "name": "QQQQ II",
        }
    ]
},
{
    "id": 2,
    "name": "RRRR II",
    "classB": []
},
{
    "id": 3,
    "name": "FFFFF III",
    "classB": []
},
{
    "id": 4,
    "name": "QWERR",
    "classB": [
        {
            "id": 3,
            "name": "GGGG III",
        },
        {
            "id": 4,
            "name": "HHHH IV",
        },
        {
            "id": 5,
            "name": "JJJJ V",
        }
    ]
},
{
    "id": 5,
    "name": "TRRR",
    "classB": []
}
]

问题是当我想获得ClassB列表时，ClassA根本没有返回......

获取http://localhost:8080/REST/ClassB

[
{
    "id": 1,
    "name": "SSSS I"
},
{
    "id": 2,
    "name": "QQQQ II"
},
{
    "id": 3,
    "name": "GGGG III"
},
{
    "id": 4,
    "name": "HHHH IV"
},
{
    "id": 5,
    "name": "JJJJ V"
}
]

在获取ClassB列表

时，我需要列出ClassA（其中没有classB）

我如何实现这一目标？

祝你好运