Spring MVC / Spring 数据数据获取递归

Question

我有一个 one-to-many relationship 的实体（例如 Person o->m Book）。如果我想在控制器中获取一个有书的人，它会导致递归。 @JsonIgnore by FasterXML 有帮助，但是如果我想要 bidirectional 不递归地获取怎么办。例如 fetch Person with Books 和 fetch Book with Persons?

Answer 1

使用@JsonBackReference

class Person{
    @OneToMany(mappedBy="person",fetch = FetchType.EAGER)
    private List<Book> books; 
    ...
}

class Book { 
    @ManyToOne
    @JoinColumn(columnDefinition="integer", name = "person", nullable=false)
    @JsonBackReference
    private Person person;
    ...
}

Spring MVC / Spring 数据数据获取递归

Spring MVC / Spring Data data fetch recursion

java

spring

spring-mvc

spring-data

fasterxml