JsonManagedReference之间的区别

JsonManagedReference之间的区别

本文介绍了@JsonIgnore和@JsonBackReference,@ JsonManagedReference之间的区别的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我知道 @JsonIgnore @JsonManagedReference @JsonBackReference 用于解决无限递归(StackOverflowError),这两者有什么区别?

I know both @JsonIgnore and @JsonManagedReference, @JsonBackReference are used to solve the Infinite recursion (StackOverflowError), what is the difference between these two?

注意:
这些是Jackson注释。

Note :These are Jackson annotations.

推荐答案

假设我们有

private class Player {
    public int id;
    public Info info;
}
private class Info {
    public int id;
    public Player parentPlayer;
}

// something like this:
Player player = new Player(1);
player.info = new Info(1, player);






序列化



@JsonIgnore

private class Info {
    public int id;
    @JsonIgnore
    public Player parentPlayer;
}

@JsonManagedReference + @JsonBackReference

private class Player {
    public int id;
    @JsonManagedReference
    public Info info;
}

private class Info {
    public int id;
    @JsonBackReference
    public Player parentPlayer;
}

将产生相同的输出。以上演示案例的输出是: {id:1,info:{id:1}}

will produce same output. And output for demo case from above is: {"id":1,"info":{"id":1}}

这是主要区别,因为反序列化与 @JsonIgnore
只会将null设置为该字段,因此在我们的示例中,parentPlayer将为== null。

Here is main difference, because deserialization with @JsonIgnorewill just set null to the field so in our example parentPlayer will be == null.

但是使用 @JsonManagedReference + @JsonBackReference 我们会获取信息 referance那里

But with @JsonManagedReference + @JsonBackReference we will get Info referance there

这篇关于@JsonIgnore和@JsonBackReference,@ JsonManagedReference之间的区别的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-02 10:29