Gson解析JSON文件

     //创建json解析器
    JsonParser parser = new JsonParser();
    JsonObject object = null;
    try {
        object = (JsonObject) parser.parse(reader);
    } catch (Exception e) {
        try {
            throw new Exception();
        } catch (Exception ex) {
            logger.error(storeLocationVO.getStoreCode() + ",Json解析异常", ex);
            return;
        }
    }
    //如果获取不到msg直接退出
    if (object.get("msg") == null) {
        return;
    }
    String val = object.get("msg").getAsString();
    if (val.equals("success")) {
        JsonObject data = object.get("data").getAsJsonObject();
        JsonObject condition = data.get("condition").getAsJsonObject();
        //解析出实况天气的数据并存放进对象

        //降水量
        actualWeather.setPrecipitation(condition.get("precipitation").getAsString());
        //天气情况
        actualWeather.setWeather(condition.get("condition").getAsString());
        //温度
        actualWeather.setTemp(condition.get("temp").getAsString());
        //风速
        actualWeather.setWindSpeed(condition.get("windSpeed").getAsString());
        //更新时间
        actualWeather.setUpdateTime(condition.get("updatetime").getAsString());

        //将更新时间设置为整点
        Calendar calendar = Calendar.getInstance();
        try {
            calendar.setTime(simpleDateFormat.parse(condition.get("updatetime").getAsString()));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        Date formatTime = calendar.getTime();
        actualWeather.setFormatTime(simpleDateFormat.format(formatTime));
        actualWeather.setStoreCode(storeLocationVO.getStoreCode());

        //解析出未来24小时的天气并存入对象
        JsonArray hourly = data.get("hourly").getAsJsonArray();
        int countHourly = 0;
        //循环取出每小时的数据，到24小时结束循环
        for (JsonElement json : hourly) {
            JsonObject object1 = json.getAsJsonObject();
            HourlyWeatherModel hourlyWeather = new HourlyWeatherModel();
            hourlyWeather.setStoreCode(storeLocationVO.getStoreCode());
            //小时
            hourlyWeather.setHour(object1.get("hour").getAsString());
            //日期
            hourlyWeather.setDate(object1.get("date").getAsString());
            //当前天气
            hourlyWeather.setWeather(object1.get("condition").getAsString());
            //温度
            hourlyWeather.setTemp(object1.get("temp").getAsString());
            //降水量
            hourlyWeather.setPrecipitation(object1.get("qpf").getAsString());
            //风速
            BigDecimal wind = new BigDecimal(object1.get("windSpeed").getAsString());
            BigDecimal divisor = wind.multiply(new BigDecimal(1000));
            BigDecimal windSpeed = divisor.divide(new BigDecimal(3600), 1, RoundingMode.HALF_UP);

            hourlyWeather.setWindSpeed(windSpeed.toString());
            hourlyWeatherList.add(hourlyWeather);
            countHourly++;
            if (countHourly >= 24) {
                break;
            }
        }
    }