无法反序列化my.package.name.PlaceData []的实例出START_OBJECT标记

Question

我一直试图反序列化json stirng。不明白问题出在哪里。这是throwing-

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)); 

任何线索？

Answer 1

它看起来像你反序列化一个对象而不是一个数组。 START_OBJECT标记指向开放{方括号。您可以从该对象的属性'd'中访问实际数据。