java如何迭代这个json对象并格式化它

Question

我有多个JSON文件，但它们看起来都与此类似（有些更长）：

{
  "$id": "http://example.com/myURI.schema.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "additionalProperties": false,
  "description": "Sample Procedure schema.",
  "properties": {
    "prop1": {
      "description": "",
      "type": "string"
    },
    "prop2": {
      "description": "",
      "type": "number"
    }
    "prop3": {
      "description": "",
      "type": "string"
    }
  }
}

我想提取名称（例如“prop1”、“prop2”）及其类型（例如“string”、“number”），并将其格式化为如下所示：

public static class Whatever {
  @JsonProperty
  public String prop1;

  @JsonProperty
  public Integer prop2;

  @JsonProperty
  public String prop3;

  public Whatever() {}

  public Whatever(String prop1, Integer prop2, String prop3){
    this(prop1, prop2, prop3);
  }
}

我以前从未使用过java，所以我不确定从哪里开始创建这个脚本。我主要关心的是如何迭代json对象。任何指导都很好。谢谢

Answer 1

我会这样做：

1. 创建一个包含JSON所有信息的主类和一个保存JSON的prop属性信息的次类：

public class MainJsonObject
{
    private int $id;
    private int $schema;
    
    // All the other objects that you find relevant...
    
    private List<SecondaryJsonObject> propsList = new ArrayList<>(); // This will keep all your other props with description and type
    
    // Getter and setter, do not forget them as they are needed by the JSON library!!

}

public class SecondaryJsonObject
{
    private String description;
    private String type;
    
    // Getter and setter, do not forget them !!
}

1. 可以通过以下方式迭代JSON对象：

首先，在项目中包括^{}库

然后像这样迭代JSON：

JSONObject jsonObject = new JSONObject(jsonString);

MainJsonObject mjo = new MainJsonObject();
mjo.set$id(jsonObject.getInt("$id")); // Do this for all other "normal" attributes

// Then we start with your properties array and iterate through it this way:

JSONArray jsonArrayWithProps = jsonObject.getJSONArray("properties");

for(int i = 0 ; i < jsonArrayWithProps.length(); i++)
{
    JSONObject propJsonObject = jsonArrayWithProps.getJSONObject(i); // We get the prop object 

    SecondaryJsonObject sjo = new SecondaryJsonObject();
    sjo.setDescription(propJsonObject.getString("description"));
    sjo.setTyoe(propJsonObject.getString("type"));
    
    mjo.getPropsList().add(sjo); // We fill our main object's list.

}