Java8 List 与以逗号分割String类型相互转换

 //java8特性
 //将以逗号分割的字符串转换成List类型
String ids= "1,2,3,4,5,6";
List idsList = Arrays.asList(ids.split(",")).stream().map(s -> Long.parseLong(s.trim())).collect(Collectors.toList());

//List转换成String两种方式
String idsString = StringUtils.join(idsList, ",");
StringUtils.strip(idsList.toString(),"[]");