Question

我正在尝试运行以下代码，但它正在抛出异常。

代码

try {
    JSONObject jsonObject  = new JSONObject(result);    
    JSONArray jsonArray = jsonObject.getJSONArray("current");
} catch (JSONException e) {
    e.printStackTrace();
}

主要的例外是由于JSONArray部分。如果删除该部分，则代码运行正常。

以下是API：

{
"location": {
    "name": "Paris",
    "region": "Ile-de-France",
    "country": "France",
    "lat": 48.87,
    "lon": 2.33,
    "tz_id": "Europe/Paris",
    "localtime_epoch": 1480463619,
    "localtime": "2016-11-29 23:53"
},
"current": {
    "last_updated_epoch": 1480463580,
    "last_updated": "2016-11-29 23:53",
    "temp_c": -1,
    "temp_f": 30.2,
    "is_day": 0,
    "condition": {
        "text": "Clear",
        "icon": "//cdn.apixu.com/weather/64x64/night/113.png",
        "code": 1000
    },
    "wind_mph": 0,
    "wind_kph": 0,
    "wind_degree": 0,
    "wind_dir": "N",
    "pressure_mb": 1033,
    "pressure_in": 31,
    "precip_mm": 0,
    "precip_in": 0,
    "humidity": 69,
    "cloud": 0,
    "feelslike_c": -1,
    "feelslike_f": 30.2
}
}

发生异常：

 W/System.err: org.json.JSONException: Value
 {"last_updated_epoch":1480477541,"last_updated":"2016-11-30
 03:45","temp_c":13,"temp_f":55.4,"is_day":0,"condition":{"text":"Overcast","icon":"\/\/cdn.apixu.com\/weather\/64x64\/night\/122.png","code":1009},"wind_mph":0,"wind_kph":0,"wind_degree":0,"wind_dir":"N","pressure_mb":1016,"pressure_in":30.5,"precip_mm":0,"precip_in":0,"humidity":77,"cloud":0,"feelslike_c":13,"feelslike_f":55.4}
 at current of type org.json.JSONObject cannot be converted to
 JSONArray

Answer 1

在Json中，current似乎是一个对象而不是数组。如此改变

jsonObject.getJSONArray("current");

到

jsonObject.getJSONObject("current");

将修复错误。

Answer 2

'current'不是数组，它是一个JSON对象，因此将其解析为对象，然后您可以从中检索数据。你可以使用

JSON Viewer

以获得更好/可理解的JSON视图。

Answer 3

你可以简单地使用Gson库将所有这些json转换为对象类。很容易获取和设置而不必一次又一次地迭代json。

创建模型类名称 LocationModel

public class LocationModel
{
    private Location location;
    private Current current;

    //create setter and getter

}

为当前对象

创建模型

public class Current
{
    private String temp_f;
    private Condition condition;
    private String temp_c;
    private String wind_degree;
    private String wind_dir;
    private String wind_kph;
    private String is_day;
    private String pressure_in;
    private String humidity;
    private String precip_mm;
    private String wind_mph;
    private String pressure_mb;
    private String feelslike_f;
    private String cloud;
    private String last_updated_epoch;
    private String feelslike_c;
    private String last_updated;
    private String precip_in;

    //create setter and getter
}

创建条件模型类

public class Condition
{
    private String icon;
    private String text;
    private String code;

    //create setter and getter
}

创建位置模型类

public class Location
{
    private String region;
    private String localtime;
    private String localtime_epoch;
    private String lon;
    private String tz_id;
    private String name;
    private String lat;
    private String country;

    //create setter and getter
}

如何使用？

LocationModel locationM = new Gson().fromJson(**YOURJSONSTRING**,LocationModel.class);

locationM.getLocation().getRegion(); //get Region <br>
locationM.getCurrent().getCondition().getText(); //get condition text from current<br>
locationM.getCurrent().getHumidity(); //get current humidity<br>

无法在java（android）

3 个答案: