1 /** 2      * 将集合按照降序排列-FLOAT 3      * @param nowPartTwoData 4      * @return 5      */ 6     private static  List
     
      
       > sortByValueFloatDesc(Map
       
         nowPartTwoData){ 7         //这里将map.entrySet()转换成list 8         List
        
         
          > list = new ArrayList
          
           
            >(nowPartTwoData.entrySet()); 9 //然后通过比较器来实现排序10 Collections.sort(list,new Comparator
            
             
              >() {11 //降序排序12 @Override13 public int compare(Map.Entry
              
                o1,14 Map.Entry
               
                 o2) {15 return o2.getValue().compareTo(o1.getValue());16 }17 });18 19 return list;20 }