如何将包含字符串键和浮点值的Json树转换为Map

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class JsonToMapConverter {
    public static void main(String[] args) {
        String jsonString = "{\"key1\": 1.23, \"key2\": \"value2\", \"key3\": {\"nestedKey\": 4.56}}";

        ObjectMapper objectMapper = new ObjectMapper();
        try {
            JsonNode jsonNode = objectMapper.readTree(jsonString);
            Map<String, Object> map = convertJsonToMap(jsonNode);
            System.out.println(map);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static Map<String, Object> convertJsonToMap(JsonNode jsonNode) {
        Map<String, Object> map = new HashMap<>();

        Iterator<String> fieldNames = jsonNode.fieldNames();
        while (fieldNames.hasNext()) {
            String fieldName = fieldNames.next();
            JsonNode fieldValue = jsonNode.get(fieldName);

            if (fieldValue.isObject()) {
                map.put(fieldName, convertJsonToMap(fieldValue));
            } else if (fieldValue.isArray()) {
                // Handle array conversion if needed
            } else if (fieldValue.isNumber()) {
                map.put(fieldName, fieldValue.asDouble());
            } else if (fieldValue.isTextual()) {
                map.put(fieldName, fieldValue.asText());
            } else {
                // Handle other value types if needed
            }
        }

        return map;
    }
}