Java: Jackson String to Json - 无法反序列化 START_ARRAY 令牌中的实例

Question

直截了当...

我有一个方法 returns 一个字符串（见下面的示例字符串） - 本质上，我向 URL 发出 HTTP GET 请求，响应是下面的字符串...

{
  "total": 30,
  "rows": [
    {
      "id": 1,
      "parent": "parentA",
      "children": "childB, childC, childD"
    },
    {
      "id": 2,
      "parent": "parentE",
      "children": "childF, childG, childH"
    },
    {
      "id": 3,
      "parent": "parentI",
      "children": "childJ, childK, childL"
    },
    {
      "id": 4,
      "parent": "parentM",
      "children": "childN, childO"
    },
    {
      "id": 5,
      "parent": "parentP",
      "children": "childQ, childR, childS, childT"
    },
    {
      "id": 6,
      "parent": "parentU",
      "children": "childV, childW, childX"
    },
    {
      "id": 7,
      "parent": "parentY",
      "children": "childZ"
    }
  ]
}

然后我将这个字符串分配给一个变量，然后将其映射到我的模型...

String strRel = <JSON OBJECT FROM ABOVE>
ObjectMapper mapper = new ObjectMapper();
MyModel obj = mapper.readValue(strRel, MyModel.class);

然而，当我运行我的代码时，不幸的是，returns 出现以下错误...

com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of com.my.models.MyModel out of START_ARRAY token

最终，我知道是什么导致了错误，它是对象数组，"rows"...但我不确定如何修复它。显然，我无法更改返回给我的 string/object 的架构。

任何建议将不胜感激。

更新： 我的模型

public class MyModel {
    public MyModel() {}

    private int total;
    private ModelRows rows;

    public int getTotal() { return total; }
    public ModelRows getRows() { return rows; }
}

更新： 模型行

public class ModelRows {
    public ModelRows() {}

    private int id;
    private String parent;
    private String children;

    public int getId() { return id; }

    public void setId(int id) { this.id = id; }

    public String getParent() { return parent; }

    public void setParent(String parent) { this.parent = parent; }

    public String getChildren() { return children; }

    public void setChildren(String children) { this.children = children; }
}

Answer 1

在您的 MyModel 中进行了以下更改 class

public class MyModel {
    public MyModel() {}

    private int total;
    private List<ModelRows> rows;

    public int getTotal() { return total; }
    public List<ModelRows> getRows() { return rows; }
}

Java: Jackson String to Json - 无法反序列化 START_ARRAY 令牌中的实例

Java: Jackson String to Json - Can not deserialize instance of out of START_ARRAY token

java

json

jackson

mapper