博客
关于我
java中随机生成26个字母组合的随机验证码
阅读量:593 次
发布时间:2019-03-11

本文共 585 字,大约阅读时间需要 1 分钟。

实现原理,通过随机生成1-52的随机数,然后从定义好的字母数字中取元素进行组合。

下面是代码:

public static void login(){   		String [] yan ={   				"a","b","c","d","e","f","g","h",				"i","j","k","l","m","n","o","p","q",				"r","s","t","u","v","w","x","y","z",				"A","B","C","D","E","F","G","H",				"I","J","K","L","M","N","O","P","Q",				"R","S","T","U","V","W","X","Y","Z",};		int a = (int)(Math.random()*52);		int b = (int)(Math.random()*52);		int c = (int)(Math.random()*52);		int d = (int)(Math.random()*52);		String yanzhengma = yan[a]+yan[b]+yan[c]+yan[d];		System.out.println(yanzhengma);			}

也可以自行扩展实现数字加字母组合的验证码。

欢迎关注哦:

在这里插入图片描述

转载地址:http://ddktz.baihongyu.com/

你可能感兴趣的文章
MTK Android 如何获取系统权限
查看>>
MySQL - 4种基本索引、聚簇索引和非聚索引、索引失效情况、SQL 优化
查看>>
MySQL - ERROR 1406
查看>>
mysql - 视图
查看>>
MySQL - 解读MySQL事务与锁机制
查看>>
MTTR、MTBF、MTTF的大白话理解
查看>>
mt_rand
查看>>
mysql -存储过程
查看>>
mysql /*! 50100 ... */ 条件编译
查看>>
mudbox卸载/完美解决安装失败/如何彻底卸载清除干净mudbox各种残留注册表和文件的方法...
查看>>
mysql 1264_关于mysql 出现 1264 Out of range value for column 错误的解决办法
查看>>
mysql 1593_Linux高可用(HA)之MySQL主从复制中出现1593错误码的低级错误
查看>>
mysql 5.6 修改端口_mysql5.6.24怎么修改端口号
查看>>
MySQL 8.0 恢复孤立文件每表ibd文件
查看>>
MySQL 8.0开始Group by不再排序
查看>>
mysql ansi nulls_SET ANSI_NULLS ON SET QUOTED_IDENTIFIER ON 什么意思
查看>>
multi swiper bug solution
查看>>
MySQL Binlog 日志监听与 Spring 集成实战
查看>>
MySQL binlog三种模式
查看>>
multi-angle cosine and sines
查看>>