Java-生成指定长度验证码的一种简单思路

package start;

import java.util.Random;

public class HelloMain {
    /**
     * 主函数，作为调用和测试生成验证码方法的入口
     * @param args
     */
    public static void main(String[] args)
    {
            for(int i=0; i<10;i++)
            {
                System.out.println("【"+i+"】"+"      【the verification code is】       "+createVerificationCode(6));
            }
    }
    /**
     * 生成指定长度的验证码
     * @author Q
     * @param verificationCodeLength
     * @return String
     * @since 2016-09-6
     */
    public static final String createVerificationCode(int verificationCodeLength) 
    {
        //    所有候选组成验证码的字符，可以用中文
        String[] verificationCodeArrary={"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
               "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"
               };
        String verificationCode = "";
        Random random = new Random();
        //此处是生成验证码的核心了，利用一定范围内的随机数做为验证码数组的下标，循环组成我们需要长度的验证码，做为页面输入验证、邮件、短信验证码验证都行
        for(int i=0;i<verificationCodeLength;i++){verificationCode += verificationCodeArrary[random.nextInt(verificationCodeArrary.length)];}
        return verificationCode;
    }
}