63 lines
1.8 KiB
Java
63 lines
1.8 KiB
Java
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package com.xkrs.utils;
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import java.util.Random;
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import java.util.UUID;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* 随机字符串产生工具
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* @author tajochen
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*/
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public class RandomUtil {
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/**
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* 获取随机字母数字组合
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* @param length
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* 字符串长度
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* @return
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*/
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public static String getRandomCharAndNumr(Integer length) {
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String str = "";
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StringBuilder strBuffer = new StringBuilder();
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Random random = new Random();
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for (int i = 0; i < length; i++) {
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boolean b = random.nextBoolean();
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// 字符串
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if (b) {
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//取得65大写字母还是97小写字母
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int choice = random.nextBoolean() ? 65 : 97;
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strBuffer.append((char) (choice + random.nextInt(26)));
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} else {
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// 数字
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strBuffer.append(random.nextInt(10));
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}
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}
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str = strBuffer.toString();
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return str;
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}
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/**
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* 验证随机字母数字组合是否纯数字与纯字母
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* @param str
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* @return true 是 ， false 否
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*/
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public static boolean isRandomUsable(String str) {
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// String regExp =
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// "^[A-Za-z]+(([0-9]+[A-Za-z0-9]+)|([A-Za-z0-9]+[0-9]+))|[0-9]+(([A-Za-z]+[A-Za-z0-9]+)|([A-Za-z0-9]+[A-Za-z]+))$";
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String regExp = "^([0-9]+)|([A-Za-z]+)$";
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Pattern pat = Pattern.compile(regExp);
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Matcher mat = pat.matcher(str);
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return mat.matches();
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}
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/**
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* 生成UUID
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* @return
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*/
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public static String getUuid32(){
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String uuid = UUID.randomUUID().toString().replace("-", "").toLowerCase();
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return uuid;
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// return UUID.randomUUID().toString().replace("-", "").toLowerCase();
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}
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}
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