如题，示例代码如下：
/**
* 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());
} }
【待优化】==============================================