我们如何在Java中对JSONArray进行排序？

How can we sort a JSONArray in Java?

我们可以在以下示例中对JSONArray进行排序。

例

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import java.util.*;
import org.json.*;
public class SortJSONArrayTest {
public static void main(String[] args) {
String jsonStr ="[ {"ID":"115","Name":"Raja" },{"ID":"120","Name":"Jai" },{"ID":"125","Name":"Adithya" }]";
JSONArray jsonArray = new JSONArray(jsonStr);
JSONArray sortedJsonArray = new JSONArray();
List list = new ArrayList();
for(int i = 0; i < jsonArray.length(); i++) {
list.add(jsonArray.getJSONObject(i));
}
System.out.println("Before Sorted JSONArray:" + jsonArray);
Collections.sort(list, new Comparator() {
private static final String KEY_NAME ="Name";
@Override
public int compare(JSONObject a, JSONObject b) {
String str1 = new String();
String str2 = new String();
try {
str1 = (String)a.get(KEY_NAME);
str2 = (String)b.get(KEY_NAME);
} catch(JSONException e) {
e.printStackTrace();
}
return str1.compareTo(str2);
}
});
for(int i = 0; i < jsonArray.length(); i++) {
sortedJsonArray.put(list.get(i));
}
System.out.println("Sorted JSON Array with Name:" + sortedJsonArray);
}
}

输出量

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Before Sorted JSONArray:
[{"ID":"115","Name":"Raja"},
{"ID":"120","Name":"Jai"},
{"ID":"125","Name":"Adithya"}]
Sorted JSON Array with Name:
[{"ID":"125","Name":"Adithya"},
{"ID":"120","Name":"Jai"},
{"ID":"115","Name":"Raja"}]