对元素为map的list按map中的值进行排序

Collections.sort(list, new Comparator<Map<String, Object>>() {
        @Override
        public int compare(Map<String, Object> o1, Map<String, Object> o2) {
            Integer value1 = 0;
            Integer value2 = 0;
            for (String key : o1.keySet()) {
                value1 = (Integer) o1.get(key);
            }
            for (String key : o2.keySet()) {
                value2 = (Integer) o2.get(key);
            }
            return value2.compareTo(value1);

        }
});