http://blog.csdn.net/yaerfeng/article/details/18362623
http://www.zuidaima.com/code/file/2214023444104192.htm?dir=/2214023444104192.java
以下为抢红包的随机分配的Integer实现,主要参考以:抢红包的随机分配红包算法
/** * 根据分配数值随机分配到N个,总和等于:allotRange * @param allolTotal 分配的总和 * @param allotSize 分配大小 * @param allotMinVal 分配最小值 * @return */ public static Iterator<Integer> allot(int allolTotal, int allotSize, int allotMinVal) { List<Integer> randoms = new ArrayList<Integer>(allotSize); for (int i = 0; i < allotSize; i++) { int safe_total = (allolTotal - (allotSize - i) * allotMinVal) / (allotSize - i); int random = new Random().nextInt(safe_total - allotMinVal) + allotMinVal; if (random < allotMinVal) { random = allotMinVal; } if (i == allotSize - 1) { random = allolTotal; } allolTotal -= random; randoms.add(random); } return randoms.iterator(); }