java解析json的操作

import java.io.FileNotFoundException;
import java.io.FileReader;

import com.google.gson.JsonArray;
import com.google.gson.JsonIOException;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.JsonSyntaxException;

public class ReadJSON {
    public static void main(String args[]){
        try {

            JsonParser parser=new JsonParser();  //创建JSON解析器

            //JsonObject result=parser.get("result").getAsJsonObject();

            JsonObject object=(JsonObject) parser.parse(new FileReader("weather.json"));  //创建JsonObject对象
             //+++++++++++++++++++++++++++是json中的主变量+++++++++++++++++++++++++++
            System.out.println("resultcode"+object.get("resultcode").getAsInt());
            System.out.println("reason"+object.get("reason").getAsString());
            //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

            //+++++++++++++++++++++到主json的目录result中   包括 迭代json object 和json 数组
            JsonObject result1=object.get("result").getAsJsonObject();

            //++++++++++++++++++进入到result中的子object json之中++++++++++++++++++++++++++++++++++++++++++++++++++
            JsonObject today=result1.get("today").getAsJsonObject();
            System.out.println("temperature:"+today.get("temperature").getAsString());
            System.out.println("weather:"+today.get("weather").getAsString());
            System.out.println("city"+today.get("city").getAsString());
            //today下面的迭代weather_id
            JsonObject weather_id=today.get("weather_id").getAsJsonObject();
            System.out.println("favalue:"+weather_id.get("fa").getAsString());
            //+++++++++++++++++通过result1 找到 存储数据的子目录   ARRAY    future，
            JsonArray array=result1.get("future").getAsJsonArray();    //得到为json的数组
            for(int i=0;i<array.size();i++){
                System.out.println("---------------");
                JsonObject subObject=array.get(i).getAsJsonObject();
                System.out.println("id="+subObject.get("temperature").getAsString());
                System.out.println("name="+subObject.get("weather").getAsString());
                System.out.println("week="+subObject.get("week").getAsString());
                System.out.println("wind"+subObject.get("wind").getAsString());
                //System.out.println("ide="+subObject.get("ide").getAsString());
            }

        } catch (JsonIOException e) {
            e.printStackTrace();
        } catch (JsonSyntaxException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}

他所解析的json为

 {
   "resultcode": "200",
   "reason": "successed!",
   "result": {
     "sk": {
       "temp": "24",
       "wind_direction": "西南风",
       "wind_strength": "2级",
       "humidity": "51%",
       "time": "10:11"
     },
     "today": {
       "temperature": "16℃~27℃",
       "weather": "阴转多云",
       "weather_id": {
         "fa": "02",
         "fb": "01"
       },
       "wind": "西南风3-4 级",
       "week": "星期四",
       "city": "滨州",
       "date_y": "2015年06月04日",
       "dressing_index": "舒适",
       "dressing_advice": "建议着长袖T恤、衬衫加单裤等服装。年老体弱者宜着针织长袖衬衫、马甲和长裤。",
       "uv_index": "最弱",
       "comfort_index": "",
       "wash_index": "较适宜",
       "travel_index": "",
       "exercise_index": "较适宜",
       "drying_index": ""
     },
     "future": [
       {
         "temperature": "16℃~27℃",
         "weather": "阴转多云",
         "weather_id": {
           "fa": "02",
           "fb": "01"
         },
         "wind": "西南风3-4 级",
         "week": "星期四",
         "date": "20150604"
       },
       {
         "temperature": "20℃~32℃",
         "weather": "多云转晴",
         "weather_id": {
           "fa": "01",
           "fb": "00"
         },
         "wind": "西风3-4 级",
         "week": "星期五",
         "date": "20150605"
       },
       {
         "temperature": "23℃~35℃",
         "weather": "多云转阴",
         "weather_id": {
           "fa": "01",
           "fb": "02"
         },
         "wind": "西南风3-4 级",
         "week": "星期六",
         "date": "20150606"
       },
       {
         "temperature": "20℃~33℃",
         "weather": "多云",
         "weather_id": {
           "fa": "01",
           "fb": "01"
         },
         "wind": "北风微风",
         "week": "星期日",
         "date": "20150607"
       },
       {
         "temperature": "22℃~34℃",
         "weather": "多云",
         "weather_id": {
           "fa": "01",
           "fb": "01"
         },
         "wind": "西南风3-4 级",
         "week": "星期一",
         "date": "20150608"
       },
       {
         "temperature": "22℃~33℃",
         "weather": "阴",
         "weather_id": {
           "fa": "02",
           "fb": "02"
         },
         "wind": "西南风3-4 级",
         "week": "星期二",
         "date": "20150609"
       },
       {
         "temperature": "22℃~33℃",
         "weather": "多云",
         "weather_id": {
           "fa": "01",
           "fb": "01"
         },
         "wind": "南风3-4 级",
         "week": "星期三",
         "date": "20150610"
       }
     ]
   }
 }