Jackson Json：如何将数组转换为JsonNode和ObjectNode？ [英] Jackson Json: how to convert array to JsonNode and ObjectNode?

问题描述

给定员工和公司类

Company
{
    String companyName;
}

Employee
{
    String employeeName;
}

我的代码如下

List<Employee> e = new ArrayList<Employee>();
.....
.....

我希望我可以得到这样的结果

i wish i can get result like this

{
    "company":{ 
                "companyName":"cName",
                "Employee":[
                    {"employeeName":"myName1"},
                    {"employeeName":"myName2"},
                    {"employeeName":"myName3"}
                ]
              }
}

这是一个简单的问题但是我很困惑的事情....
尤其是Gson和Json ....

It is a simple question, however i quite confusing somethings.... Especially Gson And Json....

请不要提议其他图书馆，我 COMPULSORY NEED 这个库可以工作。
由于某些情况，此类 不是 我想要的。

Please do not propose other library, which i COMPULSORY NEED this library to work. And due to some circumstance,this class IS NOT i wanted.

Company
{
    String companyName;
    List<Employee> employees;
}

因此我需要 手动 把它和序列化为json字符串。

Therefore i need MANUALLY put it,and serialize to json string.

编辑：
@Sotirios Delimanolis类声明是设计
类之间关系的正确方法。但是，这不是我想要的。

EDITED: @Sotirios Delimanolis classes declared is the right way to design the relationship between classes. However, that's not i wanted.

来自@hsluo的答案是正确的！和@Sotirios Delimanolis提到的相同。完全符合这个问题。

The Answer from @hsluo is Correct! and same as what @Sotirios Delimanolis mention. Totally fulfill this question.

我确实找到了另一种使用Hashmap的方法

And i did found another way to do it which using Hashmap

HashMap k = new HashMap();
List<employee> y = new ArrayList<employee>();
y......
k.put("records", y);
k.put("total", total);

然后返回@Responbody，结果与@hsluo回答相同。

and then return to @Responbody, result totally same as @hsluo answered.

感谢@Sotirios Delimanolis，@ hsluo帮助我。

推荐答案

ObjectMapper mapper = new ObjectMapper();
List<Employee> e = new ArrayList<Employee>();
ArrayNode array = mapper.valueToTree(e);
ObjectNode companyNode = mapper.valueToTree(company);
companyNode.putArray("Employee").addAll(array);
JsonNode result = mapper.createObjectNode().set("company", companyNode);

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