Jackson:将空字符串反序列化为空字符串 [英] Jackson: deserializing null Strings as empty Strings

问题描述

我有以下类，由 Jackson 映射(简化版):

I have the following class, that is mapped by Jackson (simplified version):

public class POI {
    @JsonProperty("name")
    private String name;
}

在某些情况下，服务器返回 "name": null 然后我想将 name 设置为空的 Java 字符串.

In some cases the server returns "name": null and I would like to then set name to empty Java String.

是否有任何 Jackson 注释，或者我应该在我的 getter 中检查 null 并在属性为 null 时返回空字符串?

Is there any Jackson annotation or should I just check for the null inside my getter and return empty string if the property is null?

推荐答案

您可以在默认构造函数中或在声明时设置它:

You can either set it in the default constructor, or on declaration:

public class POI {
    @JsonProperty("name")
    private String name; 

    public POI() {
        name = "";
    }
}

或

public class POI {
    @JsonProperty("name")
    private String name = "";
} 

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