如何反序列化以下 json 以便项目使用英文属性？

Question

我拥有的 json 是 lighthouses.json

{
    "count": 3,
    "results": [
        {"tunnus": 2718, "nimi": "Bengtskar", "sijainti": "Rosala", "korkeus": "52"}, 
        {"tunnus": 1015, "nimi": "Soderskar", "sijainti": "Porvoo", "korkeus": "48"}, 
        {"tunnus": 2183, "nimi": "Norreskar", "sijainti": "Loimaa", "korkeus": "21"}, 
    ]
}

我希望项目映射到类

public class Lighthouse {
    
    private int id;
    private String name;
    private String location;
    private int height;
    
    public Lighthouse() {}
       
    public int getId() { return id; }
    public void setId(int id) { this.id = id; }
    
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public String getLocation() { return location; }
    public void setLocation(String location) { this.location = location; }

    public int getHeight() { return height; }
    public void setHeight(int height) { this.height = height; }
}

Answer 1

关于您的 json 文件，您对 "results" 标记的部分感兴趣，可以借助 readTree 和 treeToValue 方法将其反序列化为 Lighthouse 数组：

ObjectMapper mapper = new ObjectMapper();
JsonNode tree = mapper.readTree(json).get("results");
Lighthouse[] lighthouses = mapper.treeToValue(tree, Lighthouse[].class);

您的 Lighthouse 类必须将 json 文件中的字段与具有不同名称的相应类字段映射到 JsonProperty 注释：

public class Lighthouse {
    @JsonProperty("tunnus")
    private int id;
    @JsonProperty("nimi")
    private String name;
    @JsonProperty("sijainti")
    private String location;
    @JsonProperty("korkeus")
    private int height;
}