Java 无法使用改装和GSON解析JSON-堆栈溢出

我在尝试改型来解析我的JSON时遇到了很多麻烦，我无法理解。每当我运行改装代码时，我都会遇到崩溃：

Caused by: java.lang.StackOverflowError: stack size 1036KB
        at com.google.gson.internal.$Gson$Types$WildcardTypeImpl.<init>($Gson$Types.java:537)

我的JSON如下所示：

  {
  "199" : {
  "anncontent" : "content",
  "anndisplaydate" : "Tuesday February 11",
  "announcements_id" : "199",
  "anntitle" : "Newsletter Issue 17"
},
"264" : {
  "anncontent" : "content",
  "anndate" : "2014-10-03 22:37:32",
  "anndisplaydate" : "Friday October 03",
  "announcements_id" : "264",
  "anntitle" : "Timetable"
},
"267" : {
  "anncontent" : "content",
  "anndate" : "2014-10-10 02:41:32",
  "anndisplaydate" : "Friday October 10",
  "announcements_id" : "267",
  "anntitle" : "Author talk with Hugh O’Brien"
}
}     

private String anntitle;
private String anncontent;
private String anndisplaydate;
private Date anndate;
private String announcements_id;

public interface AnnouncementsAPI {
@GET("/announcements.json")
ArrayList<Announcement> listAnnouncements();}

  RestAdapter restAdapter = new RestAdapter.Builder()
            .setEndpoint("https://MYURL")
            .build();
    AnnouncementsAPI announcementsAPI = restAdapter.create(AnnouncementsAPI.class);
    ArrayList<Announcement> announcements = announcementsAPI.listAnnouncements();

    Log.d("RETROFIT", "Announcemnts: " + announcements.toString());

我的公告类字段如下所示：

  {
  "199" : {
  "anncontent" : "content",
  "anndisplaydate" : "Tuesday February 11",
  "announcements_id" : "199",
  "anntitle" : "Newsletter Issue 17"
},
"264" : {
  "anncontent" : "content",
  "anndate" : "2014-10-03 22:37:32",
  "anndisplaydate" : "Friday October 03",
  "announcements_id" : "264",
  "anntitle" : "Timetable"
},
"267" : {
  "anncontent" : "content",
  "anndate" : "2014-10-10 02:41:32",
  "anndisplaydate" : "Friday October 10",
  "announcements_id" : "267",
  "anntitle" : "Author talk with Hugh O’Brien"
}
}     

private String anntitle;
private String anncontent;
private String anndisplaydate;
private Date anndate;
private String announcements_id;

public interface AnnouncementsAPI {
@GET("/announcements.json")
ArrayList<Announcement> listAnnouncements();}

  RestAdapter restAdapter = new RestAdapter.Builder()
            .setEndpoint("https://MYURL")
            .build();
    AnnouncementsAPI announcementsAPI = restAdapter.create(AnnouncementsAPI.class);
    ArrayList<Announcement> announcements = announcementsAPI.listAnnouncements();

    Log.d("RETROFIT", "Announcemnts: " + announcements.toString());

我的界面如下所示：

  {
  "199" : {
  "anncontent" : "content",
  "anndisplaydate" : "Tuesday February 11",
  "announcements_id" : "199",
  "anntitle" : "Newsletter Issue 17"
},
"264" : {
  "anncontent" : "content",
  "anndate" : "2014-10-03 22:37:32",
  "anndisplaydate" : "Friday October 03",
  "announcements_id" : "264",
  "anntitle" : "Timetable"
},
"267" : {
  "anncontent" : "content",
  "anndate" : "2014-10-10 02:41:32",
  "anndisplaydate" : "Friday October 10",
  "announcements_id" : "267",
  "anntitle" : "Author talk with Hugh O’Brien"
}
}     

private String anntitle;
private String anncontent;
private String anndisplaydate;
private Date anndate;
private String announcements_id;

public interface AnnouncementsAPI {
@GET("/announcements.json")
ArrayList<Announcement> listAnnouncements();}

  RestAdapter restAdapter = new RestAdapter.Builder()
            .setEndpoint("https://MYURL")
            .build();
    AnnouncementsAPI announcementsAPI = restAdapter.create(AnnouncementsAPI.class);
    ArrayList<Announcement> announcements = announcementsAPI.listAnnouncements();

    Log.d("RETROFIT", "Announcemnts: " + announcements.toString());

公共界面公告SAPI{
@获取（“/announcements.json”）
ArrayList listAnnouncements（）；}

最后，我的改装代码如下所示：

  {
  "199" : {
  "anncontent" : "content",
  "anndisplaydate" : "Tuesday February 11",
  "announcements_id" : "199",
  "anntitle" : "Newsletter Issue 17"
},
"264" : {
  "anncontent" : "content",
  "anndate" : "2014-10-03 22:37:32",
  "anndisplaydate" : "Friday October 03",
  "announcements_id" : "264",
  "anntitle" : "Timetable"
},
"267" : {
  "anncontent" : "content",
  "anndate" : "2014-10-10 02:41:32",
  "anndisplaydate" : "Friday October 10",
  "announcements_id" : "267",
  "anntitle" : "Author talk with Hugh O’Brien"
}
}     

private String anntitle;
private String anncontent;
private String anndisplaydate;
private Date anndate;
private String announcements_id;

public interface AnnouncementsAPI {
@GET("/announcements.json")
ArrayList<Announcement> listAnnouncements();}

  RestAdapter restAdapter = new RestAdapter.Builder()
            .setEndpoint("https://MYURL")
            .build();
    AnnouncementsAPI announcementsAPI = restAdapter.create(AnnouncementsAPI.class);
    ArrayList<Announcement> announcements = announcementsAPI.listAnnouncements();

    Log.d("RETROFIT", "Announcemnts: " + announcements.toString());

RestAdapter RestAdapter=new RestAdapter.Builder（）
.setEndpoint（“https://MYURL")
.build（）；
AnnouncementsAPI AnnouncementsAPI=restAdapter.create（AnnouncementsAPI.class）；
ArrayList announcements=announcementsAPI.listAnnouncements（）；
Log.d（“改装”、“公告mnts:+announces.toString（））；

我只是想得到一个公告对象的ArrayList，我不知道该怎么做。如果以前有人问过这个问题，我很抱歉，但是我发现前面的所有问题/示例都使用了JSON，这与我的问题/示例似乎有很大的不同

如果有人有任何想法，我将不胜感激。

---

谢谢

尝试为您的界面使用

改装回调

，如下所示：

界面

public interface AnnouncementsAPI {
    @GET("/announcements.json")
    void listAnnouncements(Callback<ListAnnouncement> callback);
}

RestAdapter restAdapter = new RestAdapter.Builder()
            .setEndpoint("https://MYURL")
            .build();
AnnouncementsAPI announcementsAPI = restAdapter.create(AnnouncementsAPI.class);

final ListAnnouncement listAnnouncement; 
announcementsAPI.listAnnouncements(new Callback<ListAnnouncement>() {
        @Override
        public void success(ListAnnouncement data, Response response) {
            listAnnouncement = data;
        }

        @Override
        public void failure(RetrofitError error) {

        }
    }
);

公共界面公告SAPI{
@获取（“/announcements.json”）
作废列表公告（回调）；
}

如果希望返回为列表，请将announcement类封装到另一个类中，如下所示：

ListAnnouncement.Java

public class ListAnnouncement {
    private List<Announcement> fieldname; //match the fieldname with the field name on the JSON

    //add getter-setter as needed
}

公共类列表公告{
private List fieldname；//将字段名与JSON上的字段名匹配
//根据需要添加getter setter
}

改装代码

public interface AnnouncementsAPI {
    @GET("/announcements.json")
    void listAnnouncements(Callback<ListAnnouncement> callback);
}

RestAdapter restAdapter = new RestAdapter.Builder()
            .setEndpoint("https://MYURL")
            .build();
AnnouncementsAPI announcementsAPI = restAdapter.create(AnnouncementsAPI.class);

final ListAnnouncement listAnnouncement; 
announcementsAPI.listAnnouncements(new Callback<ListAnnouncement>() {
        @Override
        public void success(ListAnnouncement data, Response response) {
            listAnnouncement = data;
        }

        @Override
        public void failure(RetrofitError error) {

        }
    }
);

RestAdapter RestAdapter=new RestAdapter.Builder（）
.setEndpoint（“https://MYURL")
.build（）；
AnnouncementsAPI AnnouncementsAPI=restAdapter.create（AnnouncementsAPI.class）；
最终清单公告；
announcementsAPI.listAnnounces（新回调（）{
@凌驾
public void成功（列表公告数据、响应）{
listAnnouncement=数据；
}
@凌驾
公共无效失败（错误）{
}
}
);

之后，您可以使用

列表公告

类

上的

字段名

来获取

公告

的列表

重要

---

如果您的JSON确实是一个

JSON数组

，那么上面的代码就可以工作了。从外观上看，您得到了几个具有不同键的

Announcement

对象的返回，这不是一个

JSON数组

如果所有对象都扩展了相同的基本对象，那么StackOverflower错误：堆栈大小1036KB异常发生

例如：

classbasebean

A类扩展了BaseBean

（

A类

包含

A类

和

B类

的引用）

B类扩展了BaseBean

C类扩展了BaseBean

---

实施上述情况，发生相同异常的可能性很大。（不要使用BaseBean进行扩展）。

试试这个。响应应该是这种格式的

HashMap

，看起来我有一个非常类似的问题。你知道出了什么问题吗？