Map按照Value值进行排序

//将map.entrySet转换为list

List<Map.Entry<String,Integer>> list=new LinkedList<Map.Entry<String,Integer>>(map.entrySet());

Collections.sort(list, new Comparator<Map.Entry<String,Integer>>() {

public int compare(Map.Entry<String,Integer> o1,Map.Entry<String,Integer> o2) {

return o1.getValue().compareTo(o2.getValue());

}

});

for( Map.Entry<String,Integer> entry:list ) {

System.out.println(entry.getKey()+" "+entry.getValue());

}