Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 while (in.hasNext()) { // 注意 while 处理多个 case String s = in.nextLine(); StringBuilder sb = new StringBuilder(); sb.append(s); // 补0 int k; while ((k = sb.length()) % 8 != 0) { sb.append("0"); } // 打印 int i = 0; int j = 8; while (j <= sb.length()) { System.out.println(sb.substring(i, j)); i = j; j += 8; }