通过 GSON 将 Twitter 公共时间线 (JSON) 解析为 Java 对象

Question

我见过很多人在使用 GSON 库时遇到问题 - 我仍然找不到解决我的问题的方法。

我想要实现的是从 Twitter 的公共时间线 变成带有 GSON 的 POJO。

以下是我对 twitter 的 JSON 结构的表示：

public class OneTweet {


public OneTweet()
{
    // Empty constructor
}


public String coordinates;
public String favorited;
public String created_at;
public String truncated;
public String text;
public String contributors;
public String id;
public String geo;
public String in_reply_to_user_id;
public String place;
public String in_reply_to_screen_name;
//public user user;

public List<user> user;


public String source;
public String something;


}

---

public class user {

public String name;
public String profile_sidebar_border_color;
public String profile_background_tile;
public String profile_sidebar_fill_color;
public String created_at;
public String profile_image_url;
public String location;
public String profile_link_color;
public String follow_request_sent;
public String url;
public String favourites_count;
public String contributors_enabled;
public String utc_offset;
public String id;
public String profile_use_background_image;
public String profile_text_color;

// protected is a reserved identifier
public String pprotected;

public String followers_count;
public String lang;
public String notifications;
public String time_zone;
public String verified;
public String profile_background_color;
public String geo_enabled;
public String description;
public String friends_count;
public String statuses_count;
public String profile_background_image_url;
public String following;
public String in_reply_to_status_id;
public String screen_name;

 }

---

Map<String, OneTweet> json_string_array = googlejson.fromJson(jsonstring, new TypeToken<Map<String, OneTweet>>(){}.getType());

我当前收到以下错误：

线程“main”com.google.gson.JsonParseException 中出现异常：期望找到对象：false

我猜测我的POJO结构是错误的，或者可能与JSON对象“protected”是受保护的标识符有关爪哇。如果是后者，我不知道如何解决。

Answer 1

为什么要重新发明轮子？您可以使用 twitter4j。它完成所有解析，并为您提供所需的对象。

Answer 2

所有字段都不是字符串。
例如：通知是布尔值

  import com.google.gson.annotations.SerializedName;

  public class Tweets {

@SerializedName("geo")
public String geo;

@SerializedName("in_reply_to_status_id")
public String in_reply_to_status_id;

@SerializedName("truncated")
public String truncated;

@SerializedName("created_at")
public String created_at;

@SerializedName("retweet_count")
public String retweet_count;

@SerializedName("in_reply_to_user_id")
public String in_reply_to_user_id;

@SerializedName("id_str")
public String id_str;

@SerializedName("place")
public String place;

@SerializedName("favorited")
public boolean favorited;

@SerializedName("source")
public String source;

@SerializedName("in_reply_to_screen_name")
public String in_reply_to_screen_name;

@SerializedName("in_reply_to_status_id_str")
public String in_reply_to_status_id_str;

@SerializedName("id")
public long id;

@SerializedName("contributors")
public String contributors;

@SerializedName("coordinates")
public String coordinates;

@SerializedName("retweeted")
public boolean retweeted;

@SerializedName("text")
public String text;

@SerializedName("profile_image_url")
public String profile_image_url;

// public user user;
public User user;


 }

并且

import com.google.gson.annotations.SerializedName;

public class User {

@SerializedName("friends_count")
public int friends_count;

@SerializedName("profile_background_color")
public String profile_background_color;

@SerializedName("profile_background_image_url")
public String profile_background_image_url;

@SerializedName("created_at")
public String created_at;

@SerializedName("description")
public String description;

@SerializedName("favourites_count")
public int favourites_count;

@SerializedName("lang")
public String lang;

@SerializedName("notifications")
public boolean notifications;

@SerializedName("id_str")
public String id_str;

@SerializedName("default_profile_image")
public boolean default_profile_image;

@SerializedName("profile_text_color")
public String profile_text_color;

@SerializedName("default_profile")
public boolean default_profile;

@SerializedName("show_all_inline_media")
public boolean show_all_inline_media;

@SerializedName("contributors_enabled")
public boolean contributors_enabled;

@SerializedName("geo_enabled")
public boolean geo_enabled;

@SerializedName("screen_name")
public String screen_name;

@SerializedName("profile_sidebar_fill_color")
public String profile_sidebar_fill_color;

@SerializedName("profile_image_url")
public String profile_image_url;

@SerializedName("profile_background_tile")
public boolean profile_background_tile;

@SerializedName("follow_request_sent")
public boolean follow_request_sent;

@SerializedName("url")
public String url;

@SerializedName("statuses_count")
public int statuses_count;

@SerializedName("following")
public boolean following;

@SerializedName("time_zone")
public String time_zone;

@SerializedName("profile_link_color")
public String profile_link_color;

@SerializedName("protected")
public boolean protectedd;

@SerializedName("verified")
public boolean verified;

@SerializedName("profile_sidebar_border_color")
public String profile_sidebar_border_color;

@SerializedName("followers_count")
public int followers_count;

@SerializedName("location")
public String location;

@SerializedName("name")
public String name;

@SerializedName("is_translator")
public boolean is_translator;

@SerializedName("id")
public long id;

@SerializedName("listed_count")
public int listed_count;

@SerializedName("profile_use_background_image")
public boolean profile_use_background_image;

@SerializedName("utc_offset")
public int utc_offset;

}