通过 Gson 将 json 字符串转换为数组 java 对象

Question

我一直不明白如何使用 gson。 这是从我的网络服务获取的 json 字符串：

{
"GetHistoricalNotificationsInTopicByFilterResult":[
  {
     "BusinessCode":"10-1-75-16-1-3-0",
     "CreationDateTime":"\/Date(1502550561602)\/",
     "DeviceId":"8998432005",
     "Distributions":null,
     "EventData":[ ],
     "EventId":"com.test.revisit.events",
     "EventTitle":"sending",
     "Id":"69dbc367-09ws-bf3c-9re8-5c6b35ecbrtg",
     "ProcessId":"4ebb6271-bf3c-9re8-a148-5c6b35ec458",
     "SystemId":"com.safarayaneh.revisit",
     "SystemTitle":"seeing",
     "UserFullName":"jack",
     "UserId":"69dbc367-32f3-4e94-bf3c-5c6b35ec3456",
     "WKT":"POLYGON ((59.0 36.0, 59.01 36.01, ...))",
     "WorkItemId":2354365
 },{
 ....
}

这是我的合同类：

public class SaveNotify implements Parcelable {

private long id;
private String NotificationID;
private String MessageID;
private String CreationDateTime;
private String DeviceId;
private String UserId;
private String UserFullName;
private String SystemId;
private String SystemTitle;
private String EventId;
private String EventTitle;
private String EventData;
private String BusinessCode;
private String ProcessId;
private String WorkItemId;
private String WKT;
private String Distributions;
private String Address;
private String SaveDate;
private String Status;
private String DistributionId;
private String SchedulerCreationDateTime;
private String ExpirationDateTime;

如何将我从 web 服务接收到的 json 字符串转换为 pojo 类作为数组列表？我想将此列表放入我的回收器视图适配器中，以便将此信息显示为列表。

Answer 1

您需要创建一个对象，该对象获取字段GetHistoricalNotificationsInTopicByFilterResult

public class MainObject implements Parceable{

    List<SaveNotify > GetHistoricalNotificationsInTopicByFilterResult;

}

然后，使用 Gson 将 JSON 分配给 MainObject

Gson gson = new Gson();
MainObject mainObject = gson.fromJson(jsonString, MainObject.class);