本文介绍了Gson Json解析器数组数组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
寻找解析一些Json并解析出数组的数组。不幸的是，我无法弄清楚如何处理json中的嵌套数组。 {
type： MultiPolygon，
坐标：[
[
[
[
-71.25，
42.33
]，
[
-71.25，
42.33
]
]
]，
[
[
[
-71.23，
42.33
]，
[
-71.23，
42.33
]
]
]
]
当我只是一个单一的数组时，我已经实现了。
public class JsonObjectBreakDown {
public String type;
public List< List< String []>> coordinates = new ArrayList<>（）;
public void setCoordinates（List< List< String []>> coordinates）{
this.coordinates = coordinates;
}
}
解析调用
JsonObjectBreakDown p = gson.fromJson（withDup，JsonObjectBreakDown.class）;
解决方案
您有一个阵列数组的字符串数组的数组。你需要
public List< List< List< String []>>> coordinates = new ArrayList<>（）;
以下
public static void main（String args []）{
Gson gson = new Gson（）;
String jsonstr ={\type \：\MultiPolygon \，\coordinates\：[[[[-71.25，42.33]，[-71.25，42.33]] ]，[[[-71.23,42.33]，[-71.23,42.33]]]]};
JsonObjectBreakDown obj = gson.fromJson（jsonstr，JsonObjectBreakDown.class）;
System.out.println（Arrays.toString（obj.coordinates.get（0）.get（0）.get（0）））;
}
public static class JsonObjectBreakDown {
public String type;
public List< List< List< String []>>> coordinates = new ArrayList<>（）;
public void setCoordinates（List< List< List< String []>>>坐标）{
this.coordinates = coordinates;
打印
[ - 71.25，42.33]
Looking to parse some Json and parse out array of arrays. Unfortunately I cannot figure out how to handle nested arrays within the json.
json
{
"type": "MultiPolygon",
"coordinates": [
[
[
[
-71.25,
42.33
],
[
-71.25,
42.33
]
]
],
[
[
[
-71.23,
42.33
],
[
-71.23,
42.33
]
]
]
]
}
What I have implemented when I just an a single array.
public class JsonObjectBreakDown {
public String type;
public List<List<String[]>> coordinates = new ArrayList<>();
public void setCoordinates(List<List<String[]>> coordinates) {
this.coordinates = coordinates;
}
}
parsing call
JsonObjectBreakDown p = gson.fromJson(withDup, JsonObjectBreakDown.class);
解决方案 You've got an array of arrays of arrays of arrays of Strings. You need
public List<List<List<String[]>>> coordinates = new ArrayList<>();
The following
public static void main(String args[]) {
Gson gson = new Gson();
String jsonstr ="{ \"type\": \"MultiPolygon\",\"coordinates\": [ [ [ [ -71.25, 42.33 ], [ -71.25, 42.33 ] ] ], [ [ [ -71.23, 42.33 ], [ -71.23, 42.33 ] ] ] ]}";
JsonObjectBreakDown obj = gson.fromJson(jsonstr, JsonObjectBreakDown.class);
System.out.println(Arrays.toString(obj.coordinates.get(0).get(0).get(0)));
}
public static class JsonObjectBreakDown {
public String type;
public List<List<List<String[]>>> coordinates = new ArrayList<>();
public void setCoordinates(List<List<List<String[]>>> coordinates) {
this.coordinates = coordinates;
}
}
prints
[-71.25, 42.33]
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