数组拆分

 /** * 把大数据量的List拆分 * @param bigList 须要导出的Excel数据 * @param capacity 子List的最大存储数据量 * */ @SuppressWarnings({ "rawtypes", "unchecked" }) public static List getSplitList(List bigList,int capacity){ List<List> splitList = new ArrayList<List>(); //获得将要拆分的List的子List的数量 int count = bigList.size()%capacity > 0 ? bigList.size()/capacity + 1 : bigList.size()/capacity; for(int i = 0;i < count;i++){ List smallList = new ArrayList<>(); for(int j =capacity*i;j<Math.min(capacity*(i+1), bigList.size());j++){ smallList.add(bigList.get(j)); } splitList.add(smallList); } return splitList; }