实例解析嵌套的JSON格式数据

关于JSON数据格式的基本知识和概念，参看：

http://www.cnblogs.com/zouzf/archive/2012/03/31/2426646.html

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1. <span style="font-size:18px;">var = {  
2.         "resultcode":"200",  
3.         "reason":"Successed!",  
4.         "result":  
5.                 {  
6.                     "lat":"41.2334465",  
7.                     "lng":"116.9772857",  
8.                     "type":"1",  
9.                     "address":"河北省承德市丰宁满族自治县",  
10.                     "business":"",  
11.                     "citycode":207,  
12.                     "ext":  
13.                          {  
14.                             "adcode":"130826",  
15.                             "city":"承德市",  
16.                             "country":"中国",  
17.                             "direction":"",  
18.                             "distance":"",  
19.                             "district":"丰宁满族自治县",  
20.                             "province":"河北省",  
21.                             "street":"",  
22.                             "street_number":"",  
23.                             "country_code":0  
24.                          }  
25.                 },  
26.             "error_code":0  
27. }</span>  

例如，我想获得address，代码如下：

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1. <span style="font-size:18px;">String currentLocation = null;  
2.             try{  
3.                 JSONObject jsonObject = new JSONObject(var);  
4.                 JSONObject data = jsonObject.getJSONObject("result");  
5.                 currentLocation = data.getString("address");  
6.             }catch (JSONException e){  
7.                 e.printStackTrace();  
8.             }</span>