/**

     * 1> 按照份数---划分list

     * @param source

     * @param num    想要划分成多少份

     * @return

     */

    public static <T> List<List<T>> splitListForNum(List<T> source,int num){

        List<List<T>> result=new ArrayList<List<T>>();

        int remaider=source.size()%num;  //(先计算出余数)

        int number=source.size()/num;  //然后是商

        int offset=0;//偏移量

        for(int i=0;i<num;i++){

            List<T> value=null;

            if(remaider>0){

                value=source.subList(i*number+offset, (i+1)*number+offset+1);

                remaider--;

                offset++;

            }else{

                value=source.subList(i*number+offset, (i+1)*number+offset);

            }

            result.add(value);

        }

        return result;

    }

    /**

     * 2> 根据目标容量 划分List

     * @param source

     * @param capacity 划分完成的单个List容量

     * @param <T>

     * @return

     */

    public static <T> List<List<T>> splitListBycapacity(List<T> source,int capacity){

        List<List<T>> result=new ArrayList<List<T>>();

        if (source != null){

            int size = source.size();

            if (size > 0 ){

                for (int i = 0; i < size;) {

                    List<T> value = null;

                    int end = i+capacity;

                    if (end > size){

                        end = size;

                    }

                    value = source.subList(i,end);

                    i = end;

                    result.add(value);

                }

            }else {

                result = null;

            }

        }else {

            result = null;

        }

        return result;

    }

    public static void main(String[] args) {

        List<Integer> all = new ArrayList<>();

        int a= 1000;

        for (int i = 0; i < a; i++) {

            all.add(i+1);

        }

        List<List<Integer>> split = splitListBycapacity(all,333);

        System.out.println(split.size());

        for (List<Integer> strings : split) {

            System.out.println(strings.size());

        }

    }