public static String generateVerificationCode(int n) {
//开发验证码
//1.定义一个变量记住验证码
String code = "";
//2.定义一个全部字符的验证码字符
String data = "abcdefghijklmnopqrstuvwxyzABCDEFGHIjKLMNOPQRSTUVWXYZ0123456789";
//3.循环生成随机索引
Random ran = new Random();
for (int i = 0; i < n; i++) {
int index = ran.nextInt(data.length());
code += data.charAt(index);
}
return code;
}
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