红包随机分配算法

 1 private void split(int sum, int count) {
 2         //check sum count whether valid
 3         //.............
 4 
 5         //assgin
 6         int[] splits = new int[count];
 7         Random random = new Random();
 8         int remainsCount = count - 1;
 9         for (int i=0;i<count-1;i++) {
10             splits[i] = random.nextInt(sum - remainsCount)+1;
11             sum = sum-splits[i];
12             remainsCount--;
13         }
14         splits[count-1] = sum;
15         System.out.println(Arrays.toString(splits));
16 }