Java版 微信红包算法详解编程语言

 private double[] divide(double totalMoney,int num,double minMoney){ 
        double[] each = new double[num]; 
        for(int i=0;i<num-1;i++){ 
            //计算最大安全值，保证不会超出  。如果安全值越大，价格波动越大  .建议是平均值 
            double maxSafeMoney = (totalMoney - (num-1-i)*minMoney) / (num-1-i); 
            //随机算出最小值，保证不低于最小值 
            each[i] = Math.random()*(maxSafeMoney-minMoney)+minMoney; 
            //计算当前剩下的钱 
            totalMoney = totalMoney - each[i]; 
        } 
        each[num-1] = totalMoney; 
        return each; 
    } 
  
    @Test 
    public void test3(){ 
        double[] rs = divide(200,10,0.01); 
        for(double each:rs){ 
            System.out.format("%.2f/n",each); 
        } 
    }

结果：

16.70 
21.37 
18.89 
12.13 
11.35 
23.21 
24.32 
7.39 
14.10 
50.57