迭代嵌套 json 和提取值的指导

Question

编码和 java 的新手，所以想弄清楚如何迭代这个 JSON 并提取嵌套值

{
    "prop1": {
      "description": "",
      "type": "string"
    },
    "prop2": {
      "description": "",
      "type": "string"
    },
    "prop3": {
      "description": "",
      "type": "string"
    },
    "prop4": {
      "description": "",
      "type": "string"
    }
}

到目前为止我有这个：

public class JSONReadExample
{
  public static void main(String[] args) throws Exception {

      Object procedure = new JSONParser().parse(new FileReader("myFile.json"));
      ObjectMapper objectMapper = new ObjectMapper();

      String procedureString = objectMapper.writeValueAsString(procedure);

      Map<String, Object> map
              = objectMapper.readValue(procedureString, new TypeReference<Map<String,Object>>(){});

      map.forEach((key, value) -> System.out.println(key + ":" + value));

如何检索每个键的“类型”，例如“字符串”或“数字”嵌套值？

Answer 1

像这样尝试特定类型的地图：

Map<String, LinkedHashMap<String, String>> map = objectMapper.readValue(procedureString, new TypeReference<>() {});

然后您可以使用以下方法检索“类型”：

map.forEach((key, value) -> System.out.println(key + ":" + value.get("type")));

迭代嵌套 json 和提取值的指导

guidance with iterating over nested json and extract values

foreach

maps

nested-loops

objectmapper

jsonparser