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 常用
查看>>
MySQL 常用列类型
查看>>
mysql 常用命令
查看>>
Mysql 常见ALTER TABLE操作
查看>>
MySQL 常见的 9 种优化方法
查看>>
MySQL 常见的开放性问题
查看>>
Mysql 常见错误
查看>>
MYSQL 幻读（Phantom Problem）不可重复读
查看>>
mysql 往字段后面加字符串
查看>>
mysql 快速自增假数据， 新增假数据，mysql自增假数据
查看>>
Mysql 报错 Field 'id' doesn't have a default value
查看>>
MySQL 报错：Duplicate entry 'xxx' for key 'UNIQ_XXXX'
查看>>
Mysql 拼接多个字段作为查询条件查询方法
查看>>
mysql 排序id_mysql如何按特定id排序
查看>>
Mysql 提示：Communication link failure
查看>>
mysql 插入是否成功_PDO mysql：如何知道插入是否成功
查看>>
Mysql 数据库InnoDB存储引擎中主要组件的刷新清理条件：脏页、RedoLog重做日志、Insert Buffer或ChangeBuffer、Undo Log
查看>>
mysql 数据库备份及ibdata1的瘦身
查看>>
MySQL 数据库备份种类以及常用备份工具汇总
查看>>
mysql 数据库存储引擎怎么选择？快来看看性能测试吧
查看>>