Java如何去除JSON外层键值对并保留内部数据？

<code class="json">{
  "other": {
    "name": "john doe",
    "email": "john.doe@example.com"
  }
}</code>

<code class="java">import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonRemoveOuterLayer {

    public static void main(String[] args) throws JsonProcessingException {
        String json = "{ \"other\": { \"name\": \"john doe\", \"email\": \"john.doe@example.com\" } }";

        ObjectMapper mapper = new ObjectMapper();
        JsonNode rootNode = mapper.readTree(json);

        JsonNode innerNode = rootNode.get("other");

        // 使用innerNode替换rootNode
        rootNode = innerNode;


        System.out.println(mapper.writeValueAsString(rootNode));
    }
}</code>

<code class="json">{
  "name": "john doe",
  "email": "john.doe@example.com"
}</code>