桶排序也叫箱排序。工作的原理是将数组分到有限数量的桶子里，每个桶子再个别排序（有可能再使用别的排序算法或是以递归方式继续使用桶排序进行排序）。- Bucket sort is also called sorting box. Work principle is that the array to a limited number of bucket, each bucket and individual ranking (may use other sorting algorithms