从最大值开始对ArrayList<HashMap<String、Object>>进行排序

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

public class SortArrayList {
    public static void main(String[] args) {
        ArrayList<HashMap<String, Object>> list = new ArrayList<>();

        // 添加HashMap到ArrayList
        HashMap<String, Object> map1 = new HashMap<>();
        map1.put("key1", 5);
        map1.put("key2", "value1");
        list.add(map1);

        HashMap<String, Object> map2 = new HashMap<>();
        map2.put("key1", 3);
        map2.put("key2", "value2");
        list.add(map2);

        HashMap<String, Object> map3 = new HashMap<>();
        map3.put("key1", 8);
        map3.put("key2", "value3");
        list.add(map3);

        // 获取特定键对应的值并存储到新的ArrayList
        ArrayList<Integer> values = new ArrayList<>();
        for (HashMap<String, Object> map : list) {
            int value = (int) map.get("key1");
            values.add(value);
        }

        // 对新的ArrayList进行排序（从最大值开始）
        Collections.sort(values, Comparator.reverseOrder());

        // 根据排序后的新ArrayList，重新排序原始ArrayList中的HashMap
        ArrayList<HashMap<String, Object>> sortedList = new ArrayList<>();
        for (int value : values) {
            int index = values.indexOf(value);
            sortedList.add(list.get(index));
        }

        // 打印排序后的结果
        for (HashMap<String, Object> map : sortedList) {
            System.out.println(map);
        }
    }
}