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 InnoDB事务隔离级别与锁机制深入解析
查看>>
Mysql InnoDB存储引擎 —— 数据页
查看>>
Mysql InnoDB存储引擎中的checkpoint技术
查看>>
Mysql InnoDB存储引擎中缓冲池Buffer Pool、Redo Log、Bin Log、Undo Log、Channge Buffer
查看>>
MySQL InnoDB引擎的锁机制详解
查看>>
Mysql INNODB引擎行锁的3种算法 Record Lock Next-Key Lock Grap Lock
查看>>
mysql InnoDB数据存储引擎 的B+树索引原理
查看>>
mysql interval显示条件值_MySQL INTERVAL关键字可以使用哪些不同的单位值？
查看>>
mysql problems
查看>>
MySQL replace函数替换字符串语句的用法（mysql字符串替换）
查看>>
mysql workbench6.3.5_MySQL Workbench
查看>>
MySQL Workbench安装教程以及菜单汉化
查看>>
MySQL Xtrabackup 安装、备份、恢复
查看>>
mysql [Err] 1436 - Thread stack overrun: 129464 bytes used of a 286720 byte stack, and 160000 bytes
查看>>
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>>