List & 逗号分隔的字符串互转

将逗号分隔的字符串转换为List

//方法一
List<String> list = Arrays.asList(str.split(","));

//方法二
List<String> list = Arrays.asList(StringUtils.split(str, ","));

将list转化为逗号分割的字符串

//方法一：join()
　String str = String.join(",", list);

//方法二：流
String lettersCommaSeparated = list.stream().collect(Collectors.joining(","));

List<String> & 逗号分隔的字符串互转

原文：https://www.cnblogs.com/silloutte/p/14768980.html