我是JSON的新手，我正在处理的文件在对象中有很多对象（它们都是不同的变量类型，例如String，Int，Boolean）。我正在尝试创建一个天气预报程序。我已经尝试将其转换为csv并尝试从JSON数组中取出值但不幸的是我遇到了所有不同变量类型的麻烦。任何帮助将不胜感激。我已粘贴下面的JSON内容：
{
"cod": "200",
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"cnt": 40,
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},
"weather": [{
"id": 500,
"main": "Rain",
"description": "light rain",
"icon": "10n"
}],
"clouds": {
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},
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},
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},
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},
"dt_txt": "2018-01-28 21:00:00"
}, {
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},
"weather": [{
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}],
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},
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},
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},
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},
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}, {
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},
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"icon": "10n"
}],
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},
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},
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},
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},
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}, {
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},
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}],
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},
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},
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}, {
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"main": {
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},
"weather": [{
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}],
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},
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},
"rain": {},
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"main": {
"temp": 277.027,
"temp_min": 277.027,
"temp_max": 277.027,
"pressure": 1016.85,
"sea_level": 1027.01,
"grnd_level": 1016.85,
"humidity": 85,
"temp_kf": 0
},
"weather": [{
"id": 500,
"main": "Rain",
"description": "light rain",
"icon": "10n"
}],
"clouds": {
"all": 20
},
"wind": {
"speed": 7.16,
"deg": 0.00292969
},
"rain": {
"3h": 0.07
},
"sys": {
"pod": "n"
},
"dt_txt": "2018-02-02 00:00:00"
}, {
"dt": 1517540400,
"main": {
"temp": 275.98,
"temp_min": 275.98,
"temp_max": 275.98,
"pressure": 1019.25,
"sea_level": 1029.5,
"grnd_level": 1019.25,
"humidity": 83,
"temp_kf": 0
},
"weather": [{
"id": 801,
"main": "Clouds",
"description": "few clouds",
"icon": "02n"
}],
"clouds": {
"all": 12
},
"wind": {
"speed": 6.55,
"deg": 1.5011
},
"rain": {},
"sys": {
"pod": "n"
},
"dt_txt": "2018-02-02 03:00:00"
}, {
"dt": 1517551200,
"main": {
"temp": 275.064,
"temp_min": 275.064,
"temp_max": 275.064,
"pressure": 1021.34,
"sea_level": 1031.64,
"grnd_level": 1021.34,
"humidity": 84,
"temp_kf": 0
},
"weather": [{
"id": 800,
"main": "Clear",
"description": "clear sky",
"icon": "02n"
}],
"clouds": {
"all": 8
},
"wind": {
"speed": 5.11,
"deg": 1.00006
},
"rain": {},
"sys": {
"pod": "n"
},
"dt_txt": "2018-02-02 06:00:00"
}, {
"dt": 1517562000,
"main": {
"temp": 274.354,
"temp_min": 274.354,
"temp_max": 274.354,
"pressure": 1023.32,
"sea_level": 1033.73,
"grnd_level": 1023.32,
"humidity": 91,
"temp_kf": 0
},
"weather": [{
"id": 800,
"main": "Clear",
"description": "clear sky",
"icon": "01d"
}],
"clouds": {
"all": 0
},
"wind": {
"speed": 3.76,
"deg": 355.502
},
"rain": {},
"sys": {
"pod": "d"
},
"dt_txt": "2018-02-02 09:00:00"
}, {
"dt": 1517572800,
"main": {
"temp": 278.331,
"temp_min": 278.331,
"temp_max": 278.331,
"pressure": 1024.86,
"sea_level": 1035.07,
"grnd_level": 1024.86,
"humidity": 93,
"temp_kf": 0
},
"weather": [{
"id": 800,
"main": "Clear",
"description": "clear sky",
"icon": "02d"
}],
"clouds": {
"all": 8
},
"wind": {
"speed": 3.56,
"deg": 351.002
},
"rain": {},
"sys": {
"pod": "d"
},
"dt_txt": "2018-02-02 12:00:00"
}, {
"dt": 1517583600,
"main": {
"temp": 279.161,
"temp_min": 279.161,
"temp_max": 279.161,
"pressure": 1024.46,
"sea_level": 1034.7,
"grnd_level": 1024.46,
"humidity": 86,
"temp_kf": 0
},
"weather": [{
"id": 500,
"main": "Rain",
"description": "light rain",
"icon": "10d"
}],
"clouds": {
"all": 56
},
"wind": {
"speed": 2.56,
"deg": 338.001
},
"rain": {
"3h": 0.02
},
"sys": {
"pod": "d"
},
"dt_txt": "2018-02-02 15:00:00"
}, {
"dt": 1517594400,
"main": {
"temp": 277.055,
"temp_min": 277.055,
"temp_max": 277.055,
"pressure": 1025.12,
"sea_level": 1035.4,
"grnd_level": 1025.12,
"humidity": 85,
"temp_kf": 0
},
"weather": [{
"id": 500,
"main": "Rain",
"description": "light rain",
"icon": "10n"
}],
"clouds": {
"all": 44
},
"wind": {
"speed": 1.66,
"deg": 294.004
},
"rain": {
"3h": 0.029999999999999
},
"sys": {
"pod": "n"
},
"dt_txt": "2018-02-02 18:00:00"
}],
"city": {
"id": 2633709,
"name": "Woking",
"coord": {
"lat": 51.319,
"lon": -0.559
},
"country": "GB"
}
}
答案 0 :(得分：1)
你需要从对象的角度思考。你最外层的Object是某种包装器，它包含大多数其他重要的对象。
我试图将JSON转换为适当的对象结构。我希望你明白我的观点。请添加缺少的对象。
open_graph_story正如您所看到的，我有一个public class OuterMainObject {
private String cod;
private float message;
private int cnt;
List<WeatherObject> list = new ArrayList<WeatherObject>();
private City city;
}
class City {
private String id;
private String name;
private Coordinates coord;
private String country;
}
class Coordinates {
private double lat;
private double lon;
}
class WeatherObject {
private Date dt;
private Main main;
private Weather weather;
private Clouds clouds;
private Wind wind;
private Rain rain;
private Sys sys;
private String dt_txt;
}
并且OuterMainObject中有多个对象，如果您尝试将对象从外部映射到内部，则可以轻松地将它们关联起来。
评论更新 我们不必担心如何检测和存储变量。有些图书馆为我们这样做。所以杰克逊就是这样的图书馆之一。请参阅此link。这个有关于这种转换的很好的教程。您需要关注的只是将JSON转换为适当的对象结构。
在你的情况下，应该这样做。
outermainobject答案 1 :(得分：0)
尝试这样.....
JSONObject JOBJ= new JSONObject(response);
JSONArray JS= JOBJ.getJSONArray("list");
for (int i = 0; i < JS.length(); i++) {
JSONObject c = JS.getJSONObject(i);
JSONObject main= paramsArr.getJSONObject("main");
System.out.println(main.getString("temp"));
//like this...
JSONArray JS2= JOBJ.getJSONArray("weather");
for (int j = 0; j < JS2.length(); j++)
{
JSONObject param1 = JS2.getJSONObject(0);
//now get required values by key
System.out.println(param1.getInt("id"));
}
}