逗號字符串拼接與List互轉

list轉 字符串拼接

String s = StringUtils.join(longs.stream().map(Object::toString).toArray(String[]::new), ",")

字符串拼接轉list

String ids= "1,2,3,4,5,6";
List<Long> listIds = Arrays.asList(ids.split(",")).stream().map(s -> Long.parseLong(s.trim())).collect(Collectors.toList());