List和Array相互转换

         List<String> list = new ArrayList<String>();
         list.add("1");
         list.add("2");
         list.add("3");

         String[] arTmp = (String[]) list.toArray(new String[list.size() - 1]);

         System.out.println(arTmp.toString());

         arTmp[2] = "99";
         // 数组 转 List
         List<String> list1 = Arrays.asList(arTmp);
         System.out.println(list1.toString());

参考文章： https://www.cnblogs.com/kungfupanda/p/7747004.html