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
[html] view plain copy<span style="font-size:18px;">var = {  
        "resultcode":"200",  
        "reason":"Successed!",  
        "result":  
                {  
                    "lat":"41.2334465",  
                    "lng":"116.9772857",  
                    "type":"1",  
                    "address":"河北省承德市丰宁满族自治县",  
                    "business":"",  
                    "citycode":207,  
                    "ext":  
                         {  
                            "adcode":"130826",  
                            "city":"承德市",  
                            "country":"中国",  
                            "direction":"",  
                            "distance":"",  
                            "district":"丰宁满族自治县",  
                            "province":"河北省",  
                            "street":"",  
                            "street_number":"",  
                            "country_code":0  
                         }  
                },  
            "error_code":0  
}</span>  
例如，我想获得address，代码如下：[html] view plain copy<span style="font-size:18px;">String currentLocation = null;  
            try{  
                JSONObject jsonObject = new JSONObject(var);  
                JSONObject data = jsonObject.getJSONObject("result");  
                currentLocation = data.getString("address");  
            }catch (JSONException e){  
                e.printStackTrace();  
            }</span>