java生成随机短信验证码的工具类

public class yanzhengma {

public static void main(String[] args) {

String[] beforeShuffle = new String[] { "1","2", "3", "4", "5", "6", "7",

"8", "9", "0" };

List list = Arrays.asList(beforeShuffle); //将数组转成List

Collections.shuffle(list);

StringBuilder sb = new StringBuilder();

for (int i = 0; i < list.size(); i++) {

sb.append(list.get(i));

}

String afterShuffle = sb.toString();

String result = afterShuffle.substring(3, 9);

System.out .print(result) ;

}

}