TreeMap指定排序器进行排序

Map<String, String[]> sortedHashMap = new TreeMap<String, String[]>(new Comparator<String>(){            public int compare(String o1, String o2) {    //指定排序器按照降序排列（o1, o2指的是Map的Key值）  char char1 = o1.charAt(0);char char2 = o2.charAt(0);int compare = Integer.valueOf(char2)-Integer.valueOf(char1);if (compare==0) {return o2.substring(1).compareTo(o1.substring(1));}            return compare;  }     });