43 lines
1.1 KiB
Java
43 lines
1.1 KiB
Java
package com.wf.captcha;
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import java.util.Random;
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/**
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* <p>随机工具类</p>
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*
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* @author: wuhongjun
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* @version:1.0
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*/
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public class Randoms
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{
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private static final Random RANDOM = new Random();
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//定义验证码字符.去除了O和I等容易混淆的字母
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public static final char ALPHA[]={'A','B','C','D','E','F','G','H','G','K','M','N','P','Q','R','S','T','U','V','W','X','Y','Z'
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,'a','b','c','d','e','f','g','h','i','j','k','m','n','p','q','r','s','t','u','v','w','x','y','z','2','3','4','5','6','7','8','9'};
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/**
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* 产生两个数之间的随机数
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* @param min 小数
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* @param max 比min大的数
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* @return int 随机数字
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*/
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public static int num(int min, int max)
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{
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return min + RANDOM.nextInt(max - min);
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}
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/**
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* 产生0--num的随机数,不包括num
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* @param num 数字
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* @return int 随机数字
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*/
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public static int num(int num)
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{
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return RANDOM.nextInt(num);
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}
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public static char alpha()
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{
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return ALPHA[num(0, ALPHA.length)];
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}
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} |