list分片取余

    public static <T> List<List<T>> splitList(List<T> list, int blockSize)   {  
        List<List<T>> lists = new ArrayList<List<T>>();  
        if(blockSize == 1){  
            lists.add(list);  
            return lists;  
        }    
        if (list != null && blockSize > 0) {  
            int listSize = list.size();  
            if(listSize<=blockSize){  
                lists.add(list);  
                return lists;  
            }  
            int batchSize = listSize / blockSize;  
            int remain = listSize % blockSize;  
            for (int i = 0; i < batchSize; i++) {  
                int fromIndex = i * blockSize;  
                int toIndex = fromIndex + blockSize;  
                System.out.println("fromIndex=" + fromIndex + ", toIndex=" + toIndex);  
                lists.add(list.subList(fromIndex, toIndex));  
            }  
            if(remain>0){  
                System.out.println("fromIndex=" + (listSize-remain) + ", toIndex=" + (listSize));  
                lists.add(list.subList(listSize-remain, listSize));  
            }  
        }  
        return lists;  
    }