Question

List转为数组：List<Map<String, Integer>> data = new ArrayList<Map<String, Integer>>();

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Answer 1

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class $ {
public static void main(String[] args) {
List<Map<String, String>> list = new ArrayList<Map<String, String>>();

list.add(getData(0));
list.add(getData(3));
list.add(getData(05));
list.add(getData(6));
list.add(getData(2));

System.out.println("排序前" + list);

Collections.sort(list, new Comparator<Map<String, String>>() {
public int compare(Map<String, String> o1, Map<String, String> o2) {
return o1.get("countScore").compareTo(o2.get("countScore"));
}
});

System.out.println("排序后" + list);
}

private static Map<String, String> getData(int num) {
Map<String, String> map = new HashMap<String, String>();
map.put("countScore", String.valueOf(num));
return map;
}
}

Answer 2

data.ToArray();

追问

可里面还有一个map

追答

嗯哪，转出来的额就是 Map[] 数组了撒！
不知道你想搞成什么样的数组！