在android中解析json数据格式字符串

在这里分两种情况讲解在android中解决json数据格式字符串：一种是普通的，一种是带有数组形式的。

普通形式的：
假设服务器端返回的json数据格式如下：
{
  "userbean": {
    "Uid": "100196",
    "Showname": "疯狂的猴子",
    "Avtar": null,
    "State": 1
  }
}

解析代码如下：

int res = 0;
res = httpClient.execute(httpPost).getStatusLine().getStatusCode();
if (res == 200) {
    /*
     * 当返回码为200时，做处理
     * 得到服务器端返回json数据，并做处理
     * */
    HttpResponse httpResponse = httpClient.execute(httpPost);
    StringBuilder builder = new StringBuilder();
    BufferedReader bufferedReader2 = new BufferedReader(
            new InputStreamReader(httpResponse.getEntity().getContent()));
    String str2 = "";
    for (String s = bufferedReader2.readLine(); s != null; s = bufferedReader2
            .readLine()) {
        builder.append(s);
    }
    Log.i("cat", ">>>>>>" + builder.toString());

JSONObject jsonObject = new JSONObject(builder.toString())
        .getJSONObject("userbean");

String Uid;
String Showname;
String Avtar;
String State;

Uid = jsonObject.getString("Uid");
Showname = jsonObject.getString("Showname");
Avtar = jsonObject.getString("Avtar");
State = jsonObject.getString("State");

服务器端返回的数据格式为：

{
  "calendar": {
    "calendarlist": [
      {
        "calendar_id": "1705",
        "title": "(亲子)ddssd",
        "category_name": "默认分类",
        "showtime": "1288927800",
        "endshowtime": "1288931400",
        "allDay": false
      },
      {
        "calendar_id": "1706",
        "title": "(旅行)",
        "category_name": "默认分类",
        "showtime": "1288933200",
        "endshowtime": "1288936800",
        "allDay": false
      }
    ]
  }
}
解析代码如下：

int res = 0;
res = httpClient.execute(httpPost).getStatusLine().getStatusCode();
if (res == 200) {
    /*
     * 当返回码为200时，做处理
     * 得到服务器端返回json数据，并做处理
     * */
    HttpResponse httpResponse = httpClient.execute(httpPost);
    StringBuilder builder = new StringBuilder();
    BufferedReader bufferedReader2 = new BufferedReader(
            new InputStreamReader(httpResponse.getEntity().getContent()));
    String str2 = "";
    for (String s = bufferedReader2.readLine(); s != null; s = bufferedReader2
            .readLine()) {
        builder.append(s);
    }
    Log.i("cat", ">>>>>>" + builder.toString());
    /**
     * 这里需要分析服务器回传的json格式数据，
     */
    JSONObject jsonObject = new JSONObject(builder.toString())
            .getJSONObject("calendar");
    JSONArray jsonArray = jsonObject.getJSONArray("calendarlist");
    for(int i=0;i<jsonArray.length();i++){
        JSONObject jsonObject2 = (JSONObject)jsonArray.opt(i);
        CalendarInfo calendarInfo = new CalendarInfo();
        calendarInfo.setCalendar_id(jsonObject2.getString("calendar_id"));
        calendarInfo.setTitle(jsonObject2.getString("title"));
        calendarInfo.setCategory_name(jsonObject2.getString("category_name"));
        calendarInfo.setShowtime(jsonObject2.getString("showtime"));
        calendarInfo.setEndtime(jsonObject2.getString("endshowtime"));
        calendarInfo.setAllDay(jsonObject2.getBoolean("allDay"));
        calendarInfos.add(calendarInfo);
    }

通过上面的代码我们可以发现，普通形式的只需用JSONObject ，带数组形式的需要使用JSONArray 将其变成一个list。