44 lines
1.2 KiB
Java
44 lines
1.2 KiB
Java
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package com.JN.utils;
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import java.util.Random;
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/**
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* 随机生成验证码工具类
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*/
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public class ValidateCodeUtils {
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/**
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* 随机生成验证码
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* @param length 长度为4位或者6位
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* @return
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*/
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public static Integer generateValidateCode(int length){
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Integer code =null;
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if(length == 4){
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code = new Random().nextInt(9999);//生成随机数，最大为9999
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if(code < 1000){
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code = code + 1000;//保证随机数为4位数字
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}
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}else if(length == 6){
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code = new Random().nextInt(999999);//生成随机数，最大为999999
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if(code < 100000){
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code = code + 100000;//保证随机数为6位数字
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}
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}else{
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throw new RuntimeException("只能生成4位或6位数字验证码");
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}
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return code;
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}
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/**
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* 随机生成指定长度字符串验证码
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* @param length 长度
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* @return
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*/
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public static String generateValidateCode4String(int length){
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Random rdm = new Random();
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String hash1 = Integer.toHexString(rdm.nextInt());
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String capstr = hash1.substring(0, length);
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return capstr;
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}
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}
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