排序

//降序
public static List<Map.Entry<String, Double>> getDescSortMap(Map<String, Double> valueMap) {
    List<Map.Entry<String, Double>> entryList = new ArrayList<>(valueMap.entrySet());
    Collections.sort(entryList,
            new Comparator<Map.Entry<String, Double>>() {
                public int compare(Map.Entry<String, Double> entry1,
                                   Map.Entry<String, Double> entry2) {
                    return entry2.getValue().compareTo(entry1.getValue());
                }
            });
    return entryList;
}

//升序
public static List<Map.Entry<String, Double>> getAscSortMap(Map<String, Double> valueMap) {
    List<Map.Entry<String, Double>> entryList = new ArrayList<>(valueMap.entrySet());
    Collections.sort(entryList,
            new Comparator<Map.Entry<String, Double>>() {
                public int compare(Map.Entry<String, Double> entry1,
                                   Map.Entry<String, Double> entry2) {
                    return entry1.getValue().compareTo(entry2.getValue());
                }
            });
    return entryList;
}