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package me.zhyd.oauth.utils; import java.util.concurrent.ThreadLocalRandom; /** * 生成随机字符串 * * @author yadong.zhang (yadong.zhang0415(a)gmail.com) * @version 1.0.0 * @since 1.16.0 */ public class RandomUtil { /** * 用于随机选的字符和数字 */ public static final String BASE_CHAR_NUMBER = "abcdefghijklmnopqrstuvwxyz0123456789"; /** * 获得一个随机的字符串 * * @param length 字符串的长度 * @return 指定长度的随机字符串 */ public static String randomString(int length) { final StringBuilder sb = new StringBuilder(length); if (length < 1) { length = 1; } int baseLength = BASE_CHAR_NUMBER.length(); for (int i = 0; i < length; i++) { int number = ThreadLocalRandom.current().nextInt(baseLength); sb.append(BASE_CHAR_NUMBER.charAt(number)); } return sb.toString(); } }