验证码报告

因为没有涉及过此方面知识，运用查询设置代码完成此项工作


import java.util.Scanner;

import java.util.Random;

 

public class lol{

    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("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！");

      

      

    }

 

}