List＜Map＜String, Object＞＞ 对象如何排序？

List> 对象如何排序？

例：

	List<Map<String, Object>> list = new ArrayList<>();
	Map<String, Object> map = new HashMap<>();
	map.put("id",1);
	map.put("num", 2);
	list.add(map);
	map = new HashMap<>();
	map.put("id",3);
	map.put("num", 4);
	list.add(map);
	map = new HashMap<>();
	map.put("id",2);
	map.put("num", 5);
	list.add(map);

如果是Java8的话，简单粗暴

	//升序
	list.sort(Comparator.comparingInt(o -> Integer.parseInt(o.get("id").toString())));

如果是Java8以下的版本

	Collections.sort(list, new Comparator<Map<String, Object>>() {
                    @Override
                    public int compare(Map<String, Object> o1, Map<String, Object> o2) {
                        return Integer.parseInt(o1.get("id").toString())-Integer.parseInt(o2.get("id").toString());
                    }
                });