Java 从json文件中提取json节点

如何从另一个json中提取json节点。例如，我想获取“公司名称”，即“kjh”。但使用此json解析器代码，我能够获取整个json，而不仅仅是comapnt名称。有人能帮我吗

jsonObject = (JSONObject) new org.json.simple.parser.JSONParser().parse(domainRequest);
final String companyName = (String) jsonObject.get("companyName");

以下是Json内容：

{"companyName":{"Company Name:":"kjh","Address 1:":"kjhhkh","Address 2:":"hkjhkj","Address 3:":"hkjhhkj","Address 4:":"kjhj","Postcode:":898,"Default Email Address:":"kkjkh@y","Company Registration No:":98,"VAT No:":89098,"Website":"http://localhost:9000/#/support/domain/request?formLinkUuid=7f000101-4fdf-160d-814f-dfa60dc80000"}}

{"companyName" : {
     "Company Name:":"kjh",
     "Address 1:":"kjhhkh",
     "Address 2:":"hkjhkj",
     "Address 3:":"hkjhhkj",
     "Address 4:":"kjhj",
     "Postcode:":898,
     "Default Email Address:":"kkjkh@y","Company Registration No:":98,
     "VAT No:":89098,
     "Website":"http://localhost:9000/#/support/domain/request?formLinkUuid=7f000101-4fdf-160d-814f-dfa60dc80000"
 }}

---

您错过了一个步骤，您实际上得到了一个映射（键值对），使用此映射获取公司名称

public static void main(String[] args) throws JSONException {
        String domainRequest = "{\"companyName\":{\"Company Name:\":\"kjh\",\"Address 1:\":\"kjhhkh\",\"Address 2:\":\"hkjhkj\",\"Address 3:\":\"hkjhhkj\",\"Address 4:\":\"kjhj\",\"Postcode:\":898,\"Default Email Address:\":\"kkjkh@y\",\"Company Registration No:\":98,\"VAT No:\":89098,\"Website\":\"http://localhost:9000/#/support/domain/request?formLinkUuid=7f000101-4fdf-160d-814f-dfa60dc80000\"}}";
        JSONObject jsonObject = new JSONObject(domainRequest);
        JSONObject jsonMap = (JSONObject) jsonObject.get("companyName"); // Generates HashMap, key-value pair
        String companyName = (String) jsonMap.get("Company Name:"); // from map prepared above get key value
        System.out.println(companyName);
    }

输出

kjh

---

你的json格式很奇怪。你应该去看看。
从子属性名称中删除冒号

       String json =
          "{\"companyName\" : {\n" +
                  "     \"Company Name:\":\"kjh\",\n" +
                  "     \"Address 1:\":\"kjhhkh\",\n" +
                  "     \"Address 2:\":\"hkjhkj\",\n" +
                  "     \"Address 3:\":\"hkjhhkj\",\n" +
                  "     \"Address 4:\":\"kjhj\",\n" +
                  "     \"Postcode:\":898,\n" +
                  "     \"Default Email Address:\":\"kkjkh@y\",\"Company Registration No:\":98,\n" +
                  "     \"VAT No:\":89098,\n" +
                  "     \"Website\":\"http://localhost:9000/#/support/domain/request?formLinkUuid=7f000101-4fdf-160d-814f-dfa60dc80000\"\n" +
                  " }}";

    JsonElement jsonElement = new Gson().fromJson(json, JsonElement.class);
    String companyName = jsonElement.getAsJsonObject().get("companyName").getAsJsonObject().get("Company Name:").getAsString();
    System.out.println(companyName);