package 验证码;
import java.util.Scanner;
import java.util.Random;
public class yanzhengma {
public static String getRandomString(int length) {
String str = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
Random random = new Random();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < length; ++i) {
int number = random.nextInt(62);// [0,61)
sb.append(str.charAt(number));
}
return sb.toString();
}
public static void main(String[] args) {
String inviteCode = "";
for (int i = 0; i < 10000000; i++) {
inviteCode = getRandomString(6);
}
System.out.println("验证码：" + inviteCode );
System.out.println("用户输入验证码：");
Scanner in=new Scanner(System.in);
String a;
a=in.next();
if(a.equals(inviteCode)==true)
System.out.println("输入正确！");
else
System.out.println("输入错误！");
}
}