Jackson的jsonNode修改值后String参数多两个引号

Jackson的jsonNode修改值后String参数多两个引号 原始代码：

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;


 public static void main(String[] args) throws JsonProcessingException {
        ObjectMapper objectMapper=new ObjectMapper();

        String soureJson="{"name":"jack"}";
        System.out.println(soureJson);

        JsonNode jsonNode = objectMapper.readTree(soureJson);

        JsonNode name = jsonNode.get("name");
        ObjectNode objectNode = (ObjectNode) jsonNode;
        objectNode.put("name", name.toString());

        String targetJson = objectNode.toString();
        System.out.println(targetJson);
    }

输出结果：

{"name":"jack"}
{"name":""jack""}

出错代码：

解决方案： 

将 toString() 改为 asText()。

改完代码：

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;


 public static void main(String[] args) throws JsonProcessingException {
        ObjectMapper objectMapper=new ObjectMapper();

        String soureJson="{"name":"jack"}";
        System.out.println(soureJson);

        JsonNode jsonNode = objectMapper.readTree(soureJson);

        JsonNode name = jsonNode.get("name");
        ObjectNode objectNode = (ObjectNode) jsonNode;
        objectNode.put("name", name.asText());

        String targetJson = objectNode.toString();
        System.out.println(targetJson);
    }

输出结果：

{"name":"jack"}
{"name":"jack"}