polygenelubricants提供的答案将基于给定数组的大小。我正在寻找将数组分割成给定数量的部分的代码。以下是我对代码所做的修改:

public static <T>List<List<T>> chopIntoParts( final List<T> ls, final int iParts )
{
    final List<List<T>> lsParts = new ArrayList<List<T>>();
    final int iChunkSize = ls.size() / iParts;
    int iLeftOver = ls.size() % iParts;
    int iTake = iChunkSize;

    for( int i = 0, iT = ls.size(); i < iT; i += iTake )
    {
        if( iLeftOver > 0 )
        {
            iLeftOver--;

            iTake = iChunkSize + 1;
        }
        else
        {
            iTake = iChunkSize;
        }

        lsParts.add( new ArrayList<T>( ls.subList( i, Math.min( iT, i + iTake ) ) ) );
    }

    return lsParts;
}

希望它能帮助到别人。

import org.apache.commons.collections4.ListUtils;
ArrayList<Integer> mainList = .............;
List<List<Integer>> multipleLists = ListUtils.partition(mainList,100);
int i=1;
for (List<Integer> indexedList : multipleLists){
  System.out.println("Values in List "+i);
  for (Integer value : indexedList)
    System.out.println(value);
i++;
}

List<List<Integer>> allChunkLists = new ArrayList<List<Integer>>();
List<Integer> chunkList = null;
int fromIndex = 0;
int toIndex = CHUNK_SIZE;

while (fromIndex < origList.size()) {
   chunkList = origList.subList(fromIndex, (toIndex > origList.size() ? origList.size() : toIndex));
   allChunkLists.add(chunkList);
   fromIndex = toIndex;
   toIndex += CHUNK_SIZE;
}

没有库，只有Java的subList()。toIndex需要适当地有界，以避免在subList()中出现越界错误。

创建一个新列表，并使用addAll()方法添加源列表的子列表视图以创建新的子列表

List<T> newList = new ArrayList<T>();
newList.addAll(sourceList.subList(startIndex, endIndex));

Java8流，一个表达式，没有其他库(两个解决方案，无需创建不必要的映射):

List<List<Integer>> partitionedList = IntStream.range(0, (list.size()-1)/targetSize+1)
        .mapToObj(i -> list.subList(i*targetSize, Math.min(i*targetSize+targetSize, list.size())))
        .collect(Collectors.toList());

List<List<Integer>> partitionedList2 = IntStream.iterate(0, i -> i < list.size(), i -> i + targetSize)
        .mapToObj(i -> list.subList(i, Math.min(i + targetSize, list.size())))
        .collect(Collectors.toList());

请记住，这些是子列表，因此对原始列表的更改也会影响这些子列表。

如果你不希望它们是子列表，而是新创建的独立列表，可以这样修改:

List<List<Integer>> partitionedList = IntStream.range(0, (list.size()-1)/targetSize+1)
        .mapToObj(i -> IntStream.range(i*targetSize, Math.min(i*targetSize+targetSize, list.size())).mapToObj(j -> list.get(j)).collect(Collectors.toList()))
        .collect(Collectors.toList());

List<List<Integer>> partitionedList2 = IntStream.iterate(0, i -> i < list.size(), i -> i + targetSize)
        .mapToObj(i -> IntStream.range(i, Math.min(i + targetSize, list.size())).mapToObj(j -> list.get(j)).collect(Collectors.toList()))
        .collect(Collectors.toList());

    **Divide a list to lists of n size**

    import java.util.AbstractList;
    import java.util.ArrayList;
    import java.util.List;

    public final class PartitionUtil<T> extends AbstractList<List<T>> {

        private final List<T> list;
        private final int chunkSize;

        private PartitionUtil(List<T> list, int chunkSize) {
            this.list = new ArrayList<>(list);
            this.chunkSize = chunkSize;
        }

        public static <T> PartitionUtil<T> ofSize(List<T> list, int chunkSize) {
            return new PartitionUtil<>(list, chunkSize);
        }

        @Override
        public List<T> get(int index) {
            int start = index * chunkSize;
            int end = Math.min(start + chunkSize, list.size());

            if (start > end) {
                throw new IndexOutOfBoundsException("Index " + index + " is out of the list range <0," + (size() - 1) + ">");
            }

            return new ArrayList<>(list.subList(start, end));
        }

        @Override
        public int size() {
            return (int) Math.ceil((double) list.size() / (double) chunkSize);
        }
    }





Function call : 
              List<List<String>> containerNumChunks = PartitionUtil.ofSize(list, 999)

详情:https://e.printstacktrace.blog/divide-a-list-to-lists-of-n-size-in-Java-8/