如何使用Gson解析没有keyName的JSON数组？
我有下一个JSON：
{
"type": "FootprintCollection",
"footprints": [
{
"type": "Footprint",
"geometry": {
"type": "MultiPolygon",
"coordinates": [
[
[
[
35.6893257989465,
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],
[
35.6907727397702,
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],
[
35.692323032482,
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],
[
35.696663852255,
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],
[
35.7100480485786,
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],
[
35.7210034521477,
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],
[
35.7374365579508,
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],
[
35.7459114928212,
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],
[
35.7651351256856,
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],
[
35.7740751485493,
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],
[
35.7852372576933,
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],
[
35.8051326841261,
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],
[
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],
[
35.8371720725332,
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],
[
35.9315849136129,
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],
[
36.1056311381665,
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],
[
36.1330196466394,
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],
[
36.1404610536348,
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],
[
36.169089796457,
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],
[
36.2687736341959,
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],
[
36.2917179701083,
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],
[
36.3156441588509,
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],
[
36.3392086114883,
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],
[
36.3611194195257,
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],
[
36.3807047866966,
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36.3876811056985,
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36.3998767436169,
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36.4097469415681,
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],
[
36.4303141615694,
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],
[
36.4524316751817,
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],
[
36.4799752132855,
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],
[
36.5118595720617,
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],
[
36.520747918082,
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],
[
36.5361474951109,
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],
[
36.5386279638095,
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],
[
36.5358374367484,
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],
[
36.5337187032556,
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[
36.5313932632885,
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[
36.5344421727681,
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36.549221633072,
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[
36.5707190281607,
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36.5940767761224,
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],
[
36.6166076999854,
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],
[
36.6355729513307,
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],
[
36.6440995621451,
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],
[
36.660119255899,
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[
36.6695760435996,
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],
[
36.682391798243,
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],
[
36.8484281759197,
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],
[
36.9137471861837,
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],
[
36.9797896668597,
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],
[
37.0514648785014,
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],
[
37.1966756528591,
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],
[
37.2263896012991,
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],
[
37.2848873230915,
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],
[
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],
[
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],
[
37.4350590348466,
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],
[
37.449941847938,
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],
[
37.4635327489373,
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],
[
37.479707472322,
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],
[
37.567867465711,
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],
[
37.5989250021872,
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],
[
37.6012504412549,
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],
[
37.5912252136727,
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],
[
37.5883313329247,
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],
[
37.5900366552675,
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],
[
37.5969096205826,
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],
[
37.6316361832633,
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],
[
37.7274442892226,
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],
[
37.7631010269909,
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],
[
37.8425277039904,
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],
[
37.8813883808691,
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],
[
37.915598178713,
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],
[
37.9462423031399,
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],
[
37.9786951026969,
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],
[
37.9796769546278,
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],
[
37.9950765316567,
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],
[
37.9955932964935,
49.9062822539229
],
[
38.0001924986849,
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],
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38.0228267762348,
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],
[
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],
[
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],
[
38.0434973490235,
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],
[
38.0459778177222,
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],
[
38.0518689311064,
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38.0552795757918,
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],
[
38.0593103372024,
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],
[
38.0789990580601,
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],
[
38.0808594091345,
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],
[
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],
[
38.0754333837437,
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],
[
38.0704724463464,
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],
[
38.0647363625931,
49.8373200549766
],
[
38.0426705258242,
49.8361831734148
],
[
38.0228267762348,
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],
[
38.0053084657132,
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],
[
38.000037469054,
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],
[
37.9984871763422,
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],
[
37.9975570003554,
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],
[
37.9997274106915,
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],
[
38.0015877617658,
49.8121794703064
],
[
38.0434973490235,
49.7907079127401
],
[
38.0453577000978,
49.7878657088355
],
[
38.0451509945228,
49.7848167993558
],
[
38.0410168803248,
49.7815611843013
],
[
38.0366243837084,
49.7793132595993
],
[
38.0234468929598,
49.7742748069368
],
[
38.0197261899118,
49.7718460150816
],
[
38.0164705748572,
49.7690554880204
],
[
38.013680047796,
49.765696519279
],
[
38.0113546078289,
49.761975816231
],
[
38.0093392271237,
49.7577383492455
],
[
38.0048433777197,
49.7505036487245
],
[
38.0009676450408,
49.7495217958942
],
[
37.9980220883488,
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[
37.9739408708746,
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[
37.9686698751147,
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[
37.9644840840733,
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],
[
37.9609184097569,
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[
37.9542521500168,
49.743010565785
],
[
37.9421598648859,
49.7305048695042
],
[
37.9399894545497,
49.7269391951878
],
[
37.9393693378248,
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],
[
37.9421598648859,
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],
[
37.9460355975648,
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],
[
37.9506864765997,
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],
[
37.9776615739225,
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],
[
37.9829325705817,
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[
37.9882035663416,
49.7218749050029
],
[
37.9929061213205,
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],
[
37.9960067076435,
49.7178441435924
],
[
37.9983321467113,
49.715544542047
],
[
38.0001924986849,
49.7126764997207
],
[
38.0006575866784,
49.7111262070089
],
[
38.0011226746718,
49.7084390327352
],
[
37.9992623226981,
49.6806629506347
],
[
37.9997274106915,
49.6684414742946
],
[
38.0009676450408,
49.6638681096256
],
[
38.0011226746718,
49.6605866561493
],
[
38.0003475274165,
49.6565042178954
],
[
37.9983321467113,
49.6520083684915
],
[
37.9929061213205,
49.6462722847382
],
[
37.9807621602455,
49.637073879456
],
[
37.97735151556,
49.6323713244771
],
[
37.9683598158529,
49.614594631537
],
[
37.9637089377173,
49.6094786645088
],
[
37.9589030290516,
49.6061455350884
],
[
37.9505314469687,
49.6033550071279
],
[
37.9471208022832,
49.6016755232069
],
[
37.9457255392023,
49.5998668480767
],
[
37.944485304853,
49.5967921001753
],
[
37.9458805679339,
49.5913919132063
],
[
37.9522367693115,
49.5772842473702
]
]
]
]
},
"properties": {
"id": "14128565",
"custodian": "Natural Earth"
}
}
],
"totalResults": "1"
}
我正在为coordinates创建POJO而堆叠。
public class Geometry {
String type;
Coordinates coordinates;
}
public class Coordinates {
// What need to be here???
}
我被卡住了，因为我没有理解我如何解析coordinates标签。我怎样才能正确实现POJO的结构？
2 个答案:
答案 0 :(得分：1)
你不会看到钥匙，因为钥匙不是钥匙，而是价值。 （我真的没有看到你在坐标中拥有嵌套数组的意义。）
要解析coordinate，您将拥有类似的内容
public class Geometry{
private ArrayList<ArrayList<ArrayList<Double[]>>> coordinates;
//create getter and setter methods
}
解析它，
// Get Geometry object (however you do it)
// Then use the getter method to get coordinates variable
// Parse the nested arrays
ArrayList<Double[]> values = geometry.getCoordinates().get(0).get(0).get(0);
// You can now access the values, e.g.
Double[] firstArray = values.get(0);
注意：我可能遗失或超过ArrayList。请仔细检查一下。
答案 1 :(得分：0)
public class Coordinates {
float latitude;
float longitude;
}
public class CoordinatesList1 {
ArrayList<Coordinates> list1;
}
public class CoordinatesList2 {
ArrayList<CoordinatesList1> list2;
}
public class Geometry {
String type;
ArrayList<CoordinatesList2> coordinates;
}
Gson gson = new Gson();
CoordinatesList2[] myTypes = gson.fromJson("input.json", Geometry.class);
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