“15,5,9,17,99,107,47”转List<Long>

List<Long> linkCompanyIds = Arrays.asList("15,5,9,17,99,107,47".split(",")).stream().map(s -> Long.parseLong(s.trim())).collect(Collectors.toList());

15, 16, 1, 89, 9, 89, 9, 16, 15 去重，排序 后 转 List<Integer>

List<Integer> list = Arrays.asList(15, 16, 1, 89, 9, 89, 9, 16, 15);
list.stream().distinct().sorted((Integer s1, Integer s2) -> s1 - s2).forEach(System.out::println);