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根据map的value从大到小进行排序存放在List＜Map.Entry＞中并按照key:value打印出来

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List<Map.Entry<String, Long>> list = new ArrayList<Map.Entry<String, Long>>(map.entrySet());
list.sort(new Comparator<Map.Entry<String, Long>>() {
            @Override
            public int compare(Map.Entry<String, Long> o1, Map.Entry<String, Long> o2) {
                return o2.getValue().compareTo(o1.getValue());
            }
        });
Collections.sort(list, new Comparator<Map.Entry<String, Long>>() {
            @Override
            public int compare(Map.Entry<String, Long> o1, Map.Entry<String, Long> o2) {
                return o2.getValue().compareTo(o1.getValue());
            }
        });
for (Map.Entry<String, Long> mapping : list){
            System.out.println(mapping.getKey()+": "+mapping.getValue());
        }


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