在Java中，如何在不知道确切键的情况下屏蔽JSON字符串中的特定值

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

public class JsonUtils {
    public static String maskJsonValue(String jsonString, String keyToMask) {
        try {
            ObjectMapper objectMapper = new ObjectMapper();
            JsonNode jsonNode = objectMapper.readTree(jsonString);
            
            maskJsonNodeValue(jsonNode, keyToMask);
            
            return jsonNode.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return jsonString;
        }
    }
    
    private static void maskJsonNodeValue(JsonNode jsonNode, String keyToMask) {
        if (jsonNode.isObject()) {
            jsonNode.fields().forEachRemaining(entry -> {
                if (entry.getKey().equals(keyToMask)) {
                    ((ObjectNode) jsonNode).put(entry.getKey(), (String) null);
                } else {
                    maskJsonNodeValue(entry.getValue(), keyToMask);
                }
            });
        } else if (jsonNode.isArray()) {
            jsonNode.forEach(node -> maskJsonNodeValue(node, keyToMask));
        }
    }
}

public class Main {
    public static void main(String[] args) {
        String jsonString = "{\"name\":\"John\",\"age\":30,\"city\":\"New York\"}";
        String keyToMask = "age";
        
        String maskedJsonString = JsonUtils.maskJsonValue(jsonString, keyToMask);
        System.out.println(maskedJsonString);
    }
}