JSON(JavaScript Object Notation) 是一种轻量级的数据交换格式。它基于JavaScript(Standard ECMA-262 3rd Edition - December 1999)的一个子集。
JSON 表示名称 / 值对的方式
按照最简单的形式,可以用下面这样的 JSON 表示"名称 / 值对":
{ "name": "Brett", "lage":22,"sex": "女" } ,这表示了一个JsonObject。
[{name:"张三:",age:21,sex:"女"},{name:"李斯",age:21,sex:"女"},{name:"王五",age:21,sex:"女"}],使用中括弧表示JsonArray,是json对象数组。
一、解析第一种单个json对象的json数据。数据从网络上获取。演示实例为 查询手机号码归属地。
- URL url;
- StringBuffer sb = new StringBuffer();
- String line = null;
- try {
- url = new URL(
- "http://api.showji.com/Locating/default.aspx?m=13763089126&output=json&callback=querycallback");
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
- InputStream is = conn.getInputStream();
- BufferedReader buffer = new BufferedReader(
- new InputStreamReader(is));
- while ((line = buffer.readLine()) != null) {
- sb.append(line);
- }
- } catch (MalformedURLException e) {
- e.printStackTrace();
- } catch (IOException e) {
- e.printStackTrace();
- }
URL url;
StringBuffer sb = new StringBuffer();
String line = null;
try {
url = new URL(
"http://api.showji.com/Locating/default.aspx?m=13763089126&output=json&callback=querycallback");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
InputStream is = conn.getInputStream();
BufferedReader buffer = new BufferedReader(
new InputStreamReader(is));
while ((line = buffer.readLine()) != null) {
sb.append(line);
} } catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
此处获取的数据为:
querycallback({"Mobile":"13763******","QueryResult":"True","Province":"广东","City":"湛江","AreaCode":"0759","PostCode":"524000","Corp":"中国移动","Card":"GSM"});
需要截取这个json对象出来。
String js = sb.substring(sb.indexOf("{"), sb.indexOf("}") + 1);
下面函数解析json对象,返回一个Callerloc对象
Callerloc是一个实体类
- private Callerloc parse(String json) {
- Callerloc my = null;
- if (json == null || json.length() < )
- return null;
- try {
- my = new Callerloc();
- JSONObject jsonobj = new JSONObject(json);
private Callerloc parse(String json) {
Callerloc my = null; if (json == null || json.length() < 1)
return null;
try {
my = new Callerloc();
JSONObject jsonobj = new JSONObject(json);
- my.setQueryResult(jsonobj.getString("QueryResult"));
- my.setProvince(jsonobj.getString("Province"));
- my.setCity(jsonobj.getString("City"));
- my.setAreaCode(jsonobj.getString("AreaCode"));
- my.setPostCode(jsonobj.getString("PostCode"));
- my.setCard(jsonobj.getString("Card"));
- my.setCorp(jsonobj.getString("Corp"));
my.setMobile(jsonobj.getString("Mobile"));
my.setQueryResult(jsonobj.getString("QueryResult"));
my.setProvince(jsonobj.getString("Province"));
my.setCity(jsonobj.getString("City"));
my.setAreaCode(jsonobj.getString("AreaCode"));
my.setPostCode(jsonobj.getString("PostCode"));
my.setCard(jsonobj.getString("Card"));
my.setCorp(jsonobj.getString("Corp"));
- } catch (JSONException e) {
- e.printStackTrace();
- }
- return my;
- }
} catch (JSONException e) {
e.printStackTrace();
}
return my;
}
二、解析json数组
json数据为:[{name:"张三:",age:21,sex:"女"},{name:"李斯",age:21,sex:"女"},{name:"王五",age:21,sex:"女"}]
返回list
- private ArrayList<myjson> parsem(String json) {
- myjson my = null;
- if (json == null || json.length() < )
- return null;
- try {
- JSONArray jsonary = new JSONArray(json);
- ArrayList<myjson> objlist = new ArrayList<myjson>();
- for (int i = ; i < jsonary.length(); i++) {
- my = new myjson();
- JSONObject jsonobj = jsonary.getJSONObject(i);
- my.set_name(jsonobj.getString("name"));
- my.set_age(jsonobj.getInt("age"));
- my.set_sex(jsonobj.getString("sex"));
- objlist.add(my);
- }
- return objlist;
- } catch (JSONException e) {
- e.printStackTrace();
- }
- return null;
- }