java中随机生成26个字母组合的随机验证码
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：
转载地址：http://ddktz.baihongyu.com/
你可能感兴趣的文章
MySQL _ MySQL常用操作
查看>>
MySQL – 导出数据成csv
查看>>
MySQL —— 在CentOS9下安装MySQL
查看>>
mysql 不区分大小写
查看>>
mysql 两列互转
查看>>
MySQL 中开启二进制日志（Binlog）
查看>>
MySQL 中文问题
查看>>
MySQL 中日志的面试题总结
查看>>
MySQL 中随机抽样：order by rand limit 的替代方案
查看>>
MySQL 为什么需要两阶段提交？
查看>>
mysql 为某个字段的值加前缀、去掉前缀
查看>>
mysql 主从 lock_mysql 主从同步权限mysql 行锁的实现
查看>>
mysql 主从互备份_mysql互为主从实战设置详解及自动化备份(Centos7.2)
查看>>
mysql 主键重复则覆盖_数据库主键不能重复
查看>>
Mysql 优化 or
查看>>
mysql 优化器 key_mysql – 选择*和查询优化器
查看>>
MySQL 优化：Explain 执行计划详解
查看>>
Mysql 会导致锁表的语法
查看>>
mysql 使用sql文件恢复数据库
查看>>
mysql 修改默认字符集为utf8
查看>>