Java中将List＜String＞转化为以,分割的字符串或相反(转载)

• 将逗号分隔的字符串转换为List

1.  
   List<String> list = Arrays.asList(str.split(","));
2.  
   List<String> list = Arrays.asList(StringUtils.split(str, ","));

• 将list转化为逗号分割的字符串

1.  
   String str = String.join(",", list);
2.  
   String str = StringUtils.json(list.toArray(), ",");

   转自：https://blog.csdn.net/zy103118/article/details/113778884