java中随机生成26个字母组合的随机验证码-白红宇

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。

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