Gson解析新浪微博数据
JSON是JavaScript Object Notation的缩写，可见JSON来源于JavaScript。JSON数据是一系列键值对的集合。
JSON和XML的比较
- JSON比XML体积小
- JSON和JavaScript交互更加方便
- JSON对数据的描述性没有XML好
- JSON的速度要远远大于XML
- JSON的解析要比XML的解析要方便
JSON已经被大多数开发人员所接受，在网络数据的传输当中应用非常广泛
Json的规格非常简单，只用一个页面几百个字就能说清楚，而且Douglas Crockford声称这个规格永远不必升级，因为该规定的都规定了。
1） 并列的数据之间用逗号（"，"）分隔。
2） 映射用冒号（"："）表示。
3） 并列数据的集合（数组）用方括号("[]")表示。
4） 映射的集合（对象）用大括号（"{}"）表示。
详情请看：http://www.json.org/json-zh.html
JSON文件格式化工具:http://jsonformatter.curiousconcept.com/
新浪微博的部分部件格式就像下面所示:在源码里有完整的微博数据，一次可以接收20篇微博。
{
"statuses":[
{
"created_at":"Fri May 18 09:25:28 +0800 2012",
"id":3446966543302976,
"mid":"3446966543302976",
"idstr":"3446966543302976",
"text":"知，和行之间，是质一般的鸿沟。很多人讲起道理来头头是道，做起事来一无所知，道理只是用来说的。",
"source":"<a href=\"http://www.xiaomi.com\" rel=\"nofollow\">小米手机</a>",
"favorited":false,
"truncated":false,
"in_reply_to_status_id":"",
"in_reply_to_user_id":"",
"in_reply_to_screen_name":"",
"geo":null,
"user":{
"id":1558247760,
"idstr":"1558247760",
"screen_name":"许单单",
"name":"许单单",
"province":"11",
"city":"2",
"location":"北京 西城区",
"description":"专注互联网行业趋势、竞争格局和资本定价。【免责声明】本微博一切言论仅代表个人观点，旨在交流投资经验和教训，不构成任何投资建议。",
"url":"http://blog.sina.com.cn/xudandanpku",
"profile_image_url":"http://tp1.sinaimg.cn/1558247760/50/5610765032/1",
"profile_url":"xddpku",
"domain":"xddpku",
"weihao":"",
"gender":"m",
"followers_count":143057,
"friends_count":932,
"statuses_count":6027,
"favourites_count":568,
"created_at":"Mon Mar 15 11:56:26 +0800 2010",
"following":true,
"allow_all_act_msg":false,
"geo_enabled":false,
"verified":true,
"verified_type":0,
"remark":"",
"allow_all_comment":false,
"avatar_large":"http://tp1.sinaimg.cn/1558247760/180/5610765032/1",
"verified_reason":"Danseq投资咨询公司CEO，3W咖啡创始人",
"follow_me":false,
"online_status":0,
"bi_followers_count":654,
"lang":"zh-cn"
},
"reposts_count":1,
"comments_count":0,
"mlevel":0,
"visible":{
"type":0,
"list_id":0
}
},
{
"created_at":"Fri May 18 09:25:13 +0800 2012",
"id":3446966480167755,
"mid":"3446966480167755",
"idstr":"3446966480167755",
"text":"北朝鲜这批泼水无赖，小人之尤！近则不逊，远则怨！天天喂他，还要咬人！石油能源粮食日用品都靠中国，全是倒贴！",
"source":"<a href=\"http://m.weibo.com/web/cellphone.php#ipad\" rel=\"nofollow\">iPad客户端</a>",
"favorited":false,
"truncated":false,
"in_reply_to_status_id":"",
"in_reply_to_user_id":"",
"in_reply_to_screen_name":"",
"geo":null,
"user":{
"id":1813080181,
"idstr":"1813080181",
"screen_name":"薛蛮子",
"name":"薛蛮子",
"province":"11",
"city":"5",
"location":"北京 朝阳区",
"description":"天使投资人薛蛮子 商业计划书请发信箱[email protected]或ctquan.com/manzi",
"url":"",
"profile_image_url":"http://tp2.sinaimg.cn/1813080181/50/5615039894/1",
"profile_url":"charlesxue",
"domain":"charlesxue",
"weihao":"",
"gender":"m",
"followers_count":2751028,
"friends_count":1629,
"statuses_count":44510,
"favourites_count":866,
"created_at":"Mon Sep 06 00:00:00 +0800 2010",
"following":true,
"allow_all_act_msg":true,
"geo_enabled":true,
"verified":true,
"verified_type":0,
"remark":"",
"allow_all_comment":true,
"avatar_large":"http://tp2.sinaimg.cn/1813080181/180/5615039894/1",
"verified_reason":"天使投资人、微博打拐发起人之一",
"follow_me":false,
"online_status":1,
"bi_followers_count":1329,
"lang":"zh-cn"
},
"retweeted_status":{
"created_at":"Thu May 17 18:53:02 +0800 2012",
"id":3446746988027751,
"mid":"3446746988027751",
"idstr":"3446746988027751",
"text":"【外交部：中方要求朝方确保中国船员安全】针对3艘中国渔船近日被朝鲜方面抓扣报道，中国外交部下午称，中方正通过有关渠道与朝方保持密切沟通，争取有关问题尽早得到妥善解决。中方要求朝方确保中国船员安全与合法权益。答问实录：http://t.cn/zOm5zjU",
"source":"<a href=\"http://weibo.com/\" rel=\"nofollow\">新浪微博</a>",
"favorited":false,
"truncated":false,
"in_reply_to_status_id":"",
"in_reply_to_user_id":"",
"in_reply_to_screen_name":"",
"geo":null,
"user":{
"id":1618051664,
"idstr":"1618051664",
"screen_name":"头条新闻",
"name":"头条新闻",
"province":"11",
"city":"8",
"location":"北京 海淀区",
"description":"每日播报全球各类重要资讯、突发新闻，全天24小时即时发布。欢迎报料、投稿，请发私信或者邮件：[email protected]。",
"url":"http://news.sina.com.cn/",
"profile_image_url":"http://tp1.sinaimg.cn/1618051664/50/5631943776/0",
"profile_url":"breakingnews",
"domain":"breakingnews",
"weihao":"",
"gender":"f",
"followers_count":12861287,
"friends_count":89,
"statuses_count":47001,
"favourites_count":6,
"created_at":"Fri Aug 28 16:34:36 +0800 2009",
"following":false,
"allow_all_act_msg":true,
"geo_enabled":true,
"verified":true,
"verified_type":3,
"remark":"",
"allow_all_comment":true,
"avatar_large":"http://tp1.sinaimg.cn/1618051664/180/5631943776/0",
"verified_reason":"新浪新闻中心24小时播报全球重大新闻",
"follow_me":false,
"online_status":1,
"bi_followers_count":80,
"lang":"zh-cn"
},
"reposts_count":1058,
"comments_count":855,
"mlevel":0,
"visible":{
"type":0,
"list_id":0
}
},
"reposts_count":2,
"comments_count":0,
"mlevel":0,
"visible":{
"type":0,
"list_id":0
}
},
], "hasvisible":false, "previous_cursor":0, "next_cursor":3446963247215854, "total_number":2196
主界面：使用Gson解析json数据可以很方便的就把数据和java 类互相转换。因为微博JSON数据
public class ParseJsonMain extends Activity {
/** Called when the activity is first created. */
TextView jsonTv,userTv;
InputStream in;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
jsonTv=(TextView)findViewById(R.id.json_show);
userTv=(TextView)findViewById(R.id.user_json_show);
Gson gson = new Gson();
WeiboObject response = gson.fromJson(getJsonData("weibo.json"),WeiboObject.class);
jsonTv.setText(""+response.next_cursor);
List<StatusesInfo> results = response.statuses;
StringBuilder sb=new StringBuilder();
StringBuilder idShow=new StringBuilder();
StringBuilder retweeed=new StringBuilder();
int n=0;
for (StatusesInfo result : results) {
sb.append(result.created_at+"\n");
if(result.retweeted_status==null){
n++;
}else{
retweeed.append(result.retweeted_status.text+"\n");
}
idShow.append(result.visible.list_id+"\n");
}
Log.e("kingfly", "id="+idShow);
Log.e("kingfly", ""+n);
userTv.setText(sb.toString()+"\n"+retweeed.toString());
}
public String getJsonData(String fileName) {
String x = null;
try {
InputStream in = getResources().getAssets().open(fileName);
x = fileToString(in, "UTF-8");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return x;
}
public static String fileToString(InputStream in, String charset) {
StringBuffer sb = new StringBuffer();
try {
LineNumberReader reader = new LineNumberReader(new BufferedReader(
new InputStreamReader(in, charset)));
String line;
while ((line = reader.readLine()) != null) {
sb.append(line).append(System.getProperty("line.separator"));
}
reader.close();
} catch (UnsupportedEncodingException e) {
} catch (IOException e) {
}
return sb.toString();
}
}
public class WeiboObject {
public List<StatusesInfo> statuses;
@SerializedName("hasvisible")
public boolean hasvisible;
@SerializedName("previous_cursor")
public int previous_cursor;
@SerializedName("next_cursor")
public String next_cursor;
@SerializedName("total_number")
public int total_number;
}
public class StatusesInfo {
public String created_at;
public String id; // change to int
public String idstr;
public String text;
public boolean favorited;
public boolean truncated;
public String in_reply_to_status_id;
public String in_reply_to_user_id;
public String in_reply_to_screen_name;
public List<GeoInfo> geo;
public String mid; // change to int
public int reposts_count;
public int comments_count;
public int melvel;
public VisibleInfo visible;
public UserInfo user;
public RetweetedStatus retweeted_status;
public String source;
public List<GeoInfo> getGeo() {
return geo;
}
public void setGeo(List<GeoInfo> geo) {
this.geo = geo;
}
public String getIdstr() {
return idstr;
}
public void setIdstr(String idstr) {
this.idstr = idstr;
}
public UserInfo getUser() {
return user;
}
public void setUser(UserInfo user) {
this.user = user;
}
public String getSource() {
return source;
}
public void setSource(String source) {
this.source = source;
}
public String getCreated_at() {
return created_at;
}
public void setCreated_at(String created_at) {
this.created_at = created_at;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public boolean isFavorited() {
return favorited;
}
public void setFavorited(boolean favorited) {
this.favorited = favorited;
}
public boolean isTruncated() {
return truncated;
}
public void setTruncated(boolean truncated) {
this.truncated = truncated;
}
public String getIn_reply_to_status_id() {
return in_reply_to_status_id;
}
public void setIn_reply_to_status_id(String in_reply_to_status_id) {
this.in_reply_to_status_id = in_reply_to_status_id;
}
public String getIn_reply_to_user_id() {
return in_reply_to_user_id;
}
public void setIn_reply_to_user_id(String in_reply_to_user_id) {
this.in_reply_to_user_id = in_reply_to_user_id;
}
public String getIn_reply_to_screen_name() {
return in_reply_to_screen_name;
}
public void setIn_reply_to_screen_name(String in_reply_to_screen_name) {
this.in_reply_to_screen_name = in_reply_to_screen_name;
}
public String getMid() {
return mid;
}
public void setMid(String mid) {
this.mid = mid;
}
public int getReposts_count() {
return reposts_count;
}
public void setReposts_count(int reposts_count) {
this.reposts_count = reposts_count;
}
public int getComments_count() {
return comments_count;
}
public void setComments_count(int comments_count) {
this.comments_count = comments_count;
}
public int getMelvel() {
return melvel;
}
public void setMelvel(int melvel) {
this.melvel = melvel;
}
public VisibleInfo getVisible() {
return visible;
}
public void setVisible(VisibleInfo visible) {
this.visible = visible;
}
public RetweetedStatus getRetweeted_status() {
return retweeted_status;
}
public void setRetweeted_status(RetweetedStatus retweeted_status) {
this.retweeted_status = retweeted_status;
}
}
以此类推，来分解json数据。
程序运行结果：
源码下载：
http://download.csdn.net/detail/comkingfly/4311809