java - 如何在序列化期间忽略字段，但在反序列化期间不忽略？

Question

我有一个 POJO 类

class Human{
    String name;
    Integer age;
    //get and set
}

当我将 json 反序列化为 Human 对象时，我想读取两个字段(age 和 name 值)。但是当我将 Human 对象序列化为 json 时，我想忽略 age。

这可能吗？

Answer 1

@JsonIgnore 的 javadoc状态

In addition, starting with Jackson 1.9, if this is the only annotation associated with a property, it will also cause cause the whole property to be ignored: that is, if setter has this annotation and getter has no annotations, getter is also effectively ignored. It is still possible for different accessors to use different annotations; so if only "getter" is to be ignored, other accessors (setter or field) would need explicit annotation to prevent ignoral (usually JsonProperty).

所以只需适本地注释 getter 和 setter

// for serialization
@JsonIgnore 
public String getName() {
    return name;
}
// for deserialization
@JsonProperty("name")
public void setName(String name) {
    this.name = name;
}