java - 无法从 START_OBJECT token 中反序列化 my.package.name.PlaceData[] 的实例

Question

我一直在尝试反序列化一个 json stirng。不明白哪里出了问题。它正在 throw -

org.codehaus.jackson.map.JsonMappingException: Can not deserialize instance of my.package.name.PlaceData[] out of START_OBJECT token
 at [Source: java.io.StringReader@1fea1293; line: 1, column: 1]

我的 JSON 字符串 (placesData) 是

    {
      "d":[
        {
          "__type":"my.package.name.PlaceData",
          "Id":1212,
          "Name":"Delhi",
          "MeetingId":1211,
          "Sessions":[]
        },
        {
          "__type":"my.package.name.PlaceData",
          "Id":8787,
          "Name":"Bangalore",
          "MeetingId":1211,
          "SessionNames":[]
        }
      ]
    }

Java 对象是-

public class PlaceData  {
    public String __type;
    public Integer Id;
    public String Name;
    public Integer MeetingId;
    public SessionData[] sessionData=new SessionData[0];

    public PlaceData() {
    }

    @Override
    public String toString() {
        return "PlaceData{" +
                "__type='" + __type + '\'' +
                ", Id=" + Id +
                ", Name='" + Name + '\'' +
                ", MeetingId=" + MeetingId +
                ", SessionData=" + Arrays.toString(SessionData) +
                '}';
    } }

反序列化代码-

ObjectMapper mapper = new ObjectMapper();
List<PlaceData> placesList = Arrays.asList(mapper.readValue(placesData, PlaceData[].class));

有什么线索吗？？

Answer 1

看起来您正在反序列化对象而不是数组。 START_OBJECT 标记指的是开始 { 括号。您可以从该对象的属性“d”访问您的实际数据。