84 lines
2.2 KiB
Java
84 lines
2.2 KiB
Java
package com.bwie.common.utils;
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import java.util.Random;
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public class GenCodeUtils {
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/**
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* 数字类型
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*/
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private static final String NUMBER_STR = "0123456789";
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/**
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* 字母类型
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*/
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private static final String LETTERS_STR = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
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/**
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* 短信验证码长度
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*/
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private static final Integer SMS_CODE_LENGTH = 4;
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/**
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* 生成短信四位验证码
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* @return 验证码
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*/
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public static String genLetterStrSms(){
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return genCode(LETTERS_STR, SMS_CODE_LENGTH);
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}
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/**
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* 生成短信四位验证码
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* @return 验证码
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*/
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public static String genNumberCodeSms(){
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return genCode(NUMBER_STR, SMS_CODE_LENGTH);
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}
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/**
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* 生成验证码
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* @param codeLength 验证码长度
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* @return 验证码
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*/
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public static String genLetterStr(int codeLength){
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return genCode(LETTERS_STR, codeLength);
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}
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/**
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* 生成验证码
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* @param codeLength 验证码长度
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* @return 验证码
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*/
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public static String genNumberCode( int codeLength){
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return genCode(NUMBER_STR, codeLength);
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}
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/**
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* 生成验证码
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* @param str 验证码字符串
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* @param codeLength 验证码长度
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* @return 验证码
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*/
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public static String genCode (String str, int codeLength){
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//将字符串转换为一个新的字符数组。
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char[] verificationCodeArray = str.toCharArray();
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Random random = new Random();
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//计数器
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int count = 0;
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StringBuilder stringBuilder = new StringBuilder();
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do {
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//随机生成一个随机数
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int index = random.nextInt(verificationCodeArray.length);
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char c = verificationCodeArray[index];
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//限制四位不重复数字
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if (stringBuilder.indexOf(String.valueOf(c)) == -1) {
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stringBuilder.append(c);
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//计数器加1
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count++;
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}
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//当count等于4时结束，随机生成四位数的验证码
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} while (count != codeLength);
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return stringBuilder.toString();
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}
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}
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