muyl
11/6/2019 - 2:22 PM

java8 Stream 大数据量List分批处理切割

        //方法一:使用流遍历操作
        List<List<Integer>> mglist = new ArrayList<>();
        Stream.iterate(0, n -> n + 1).limit(limit).forEach(i -> {
            mglist.add(list.stream().skip(i * MAX_NUMBER).limit(MAX_NUMBER).collect(Collectors.toList()));
        });

        System.out.println(mglist);

        //方法二:获取分割后的集合
        List<List<Integer>> splitList = Stream.iterate(0, n -> n + 1).limit(limit).parallel().map(a -> list.stream().skip(a * MAX_NUMBER).limit(MAX_NUMBER).parallel().collect(Collectors.toList())).collect(Collectors.toList());

        System.out.println(splitList);