Question

我有一个嵌套的JSON，如下所示。我想提取密钥，例如PersonB基于对其价值的搜索，例如Age ==60。 JSON是正确的数据结构来实现这样的东西吗？我尝试过使用JSONpath。但无法提出一个查询来提取这样的东西。

{
   "PersonA":{
      "shortnames":[
         "Bravo",
         "Delta"
      ],
      "Name":"Person 123",
      "Age":"15",
      "Maritial Status":"Single",
      "Work Experience":"O",
      "ID":291
   }   "PersonB":{
      "shortnames":[
         "Alpha",
         "Tango"
      ],
      "Name":"Person 234",
      "Age":"60",
      "Maritial Status":"Married",
      "Work Exxperience":"2O",
      "ID":292
   }
}

关于这样的查询看起来如何的任何指针？

Answer 1

以下是获取年龄为'60'的密钥的示例代码。

public static void main(String[] args) {

        String jsonString = "{\"PersonA\": {\"shortnames\": [\"Bravo\",\"Delta\"],\"Name\": \"Person 123\",\"Age\": \"15\",\"Maritial Status\": \"Single\",\"Work Experience\": \"O\",\"ID\": 291},\"PersonB\": {\"shortnames\": [\"Alpha\",\"Tango\"],\"Name\": \"Person 234\",\"Age\": \"60\",\"Maritial Status\": \"Married\",\"Work Exxperience\": \"2O\",\"ID\": 292},\"PersonC\": {\"shortnames\": [\"Alpha\",\"Tango\"],\"Name\": \"Person 234\",\"Maritial Status\": \"Married\",\"Work Exxperience\": \"2O\",\"ID\": 292}}";           
        Gson gson = new Gson();         
        JsonObject jsonObject = gson.fromJson(jsonString, JsonObject.class);            

        for (Entry<String, JsonElement> jsonEntry : jsonObject.entrySet()) {
            if (jsonEntry.getValue().getAsJsonObject().get("Age") != null ) {
                if (jsonEntry.getValue().getAsJsonObject().get("Age").getAsString().equals("60")) {
                    System.out.println(jsonEntry.getKey());
                    System.out.println(jsonEntry.getValue());
                }
            }
        }
}

<强>输出： -

PersonB
{"shortnames":["Alpha","Tango"],"Name":"Person 234","Age":"60","Maritial Status":"Married","Work Exxperience":"2O","ID":292}

NESTED JSON：使用JSON路径/ GSON基于JSON值的密钥提取

1 个答案: