对Map排序

 一下代码为给一个hashMap的key排序，value排序一样处理

 

public static List<Map.Entry<String, Integer>> sortHashMapInteger(HashMap<String, Integer> map, final String dateFormat) {List<Map.Entry<String, Integer>> list = new ArrayList<Map.Entry<String, Integer>>(map.entrySet());// 排序Collections.sort(list, new Comparator<Map.Entry<String, Integer>>() {public int compare(Map.Entry<String, Integer> o1, Map.Entry<String, Integer> o2) {//return ( o1.getKey()-o2.getKey());String key1 = o1.getKey();String key2 = o2.getKey();Date day1 = null;Date day2 = null;try {day1 = DateUtils.getDateByFormat(key1, dateFormat);day2 = DateUtils.getDateByFormat(key2, dateFormat);} catch (Exception e) {e.printStackTrace();} return (day1.after(day2) == true ? 1 : 0);}});return list;}