java - 嵌套 json 的模型类

Question

我想解析一个嵌套的 json，其中父键包含两个不同的嵌套键对象(不是可以在列表中抽象和序列化的单个模型)。

此示例 Json 的正确 Java 模型(对应的类)是什么？

{
    "name" : "Jack",
    "surname" : "Hopper",   
    "address" : "711-2880 Nulla St. Mankato Mississippi 96522",
    "FatherKey" :
    {   
        "ChildKeyNo1" :
        {
            "defaultKey" : "2_s_g",
            "key1" : "4_s_g",
            "key2" : "2_s_g"
        },
        "ChildKeyNo2" :
        {
            "defaultKey" : "4_s_g",
            "key1" : "6_s_g",
            "key2" : "7_s_g"
        }
    }
}

我想出了:

public class MainJsonConfiguration{
      private String name;
      private String surname;    
      private String address;
      private FatherKey fatherKey;

      public MainJsonConfiguration(String name, String surname, String address, String fatherKey){
          this.name = name;
          this.surname = surname;
          this.address = address;
          this.fatherKey = new FatherKey(new ChildKey(), new ChildKey());
       }
}

public class FatherKey{

    private ChildKey childKey1;
    private ChildKey childKey2;

    public FatherKey(ChildKey  childKey1, ChildKey  childKey2){
        this.childKey1 = childKey1;
        this.childKey2 = childKey2;
    }       
} 

public class ChildKey{

    private String defaultKey;
    private String key1;
    private String key2;

    public ChildKey(){
    }
}

但它闻起来有鱼腥味......

有什么建议吗？

非常感谢

Answer 1

您可以使用 FasterXML Jackson使用注释 JsonProperty 来定义要注入(inject)构造函数的属性的名称。

你的类(class)看起来像这样:

public class MainJsonConfiguration{
    private String name;
    private String surname;
    private String address;
    private FatherKey fatherKey;

    public MainJsonConfiguration(@JsonProperty("name") String name,
        @JsonProperty("surname") String surname,
        @JsonProperty("address") String address,
        @JsonProperty("FatherKey") FatherKey fatherKey){
        this.name = name;
        this.surname = surname;
        this.address = address;
        this.fatherKey = fatherKey;

    }
}

public class FatherKey{

    private ChildKey childKey1;
    private ChildKey childKey2;

    public FatherKey(@JsonProperty("ChildKeyNo1") ChildKey  childKey1,
        @JsonProperty("ChildKeyNo2") ChildKey  childKey2){
        this.childKey1 = childKey1;
        this.childKey2 = childKey2;
    }
}

public class ChildKey{

    private String defaultKey;
    private String key1;
    private String key2;

    public ChildKey(@JsonProperty("defaultKey") String defaultKey,
        @JsonProperty("key1") String key1,
        @JsonProperty("key2") String key2){
        this.defaultKey = defaultKey;
        this.key1 = key1;
        this.key2 = key2;
    }
}

这是解析 JSON 的代码:

ObjectMapper mapper = new ObjectMapper();
MainJsonConfiguration configuration = mapper.readValue(
    jsonString, MainJsonConfiguration.class
);