java List 与String转换

 1 　　     System.out.println("+++++++++++++++++++++++++++++++++");
 2         System.out.println("List转字符串");
 3         List<String> list1 = new ArrayList<String>();
 4         list1.add("1");
 5         list1.add("2");
 6         list1.add("3");
 7         String ss = String.join(",", list1);
 8         System.out.println(StringUtils.join("",list1));
 9         System.out.println(ss);
10         System.out.println("+++++++++++++++++++++++++++++++++");
11         System.out.println("字符串转List");
12         List<String> listString = Arrays.asList(ss.split(","));
13         for (String string : listString) {
14             System.out.println(string);
15         }
16         System.out.println("+++++++++++++++++++++++++++++++++");