42 lines
1.4 KiB
Java
42 lines
1.4 KiB
Java
package com.ruoyi.system.ControllerUtil;
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import java.util.Random;
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public class GenerateCustomCode {
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/**
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* 生成自定义前缀+16位唯一数字码
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* 例如：FEEB724145038871780
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* @param prefix 前缀字母（可为null或空，自动生成4位大写字母）
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* @return 生成的码
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*/
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public static String generCreateOrder(String prefix) {
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// 生成前缀
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String codePrefix = prefix;
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if (codePrefix == null || codePrefix.trim().isEmpty()) {
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// 随机生成4位大写字母
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StringBuilder sb = new StringBuilder();
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Random random = new Random();
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for (int i = 0; i < 4; i++) {
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char c = (char) ('A' + random.nextInt(26));
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sb.append(c);
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}
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codePrefix = sb.toString();
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}
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// 生成16位唯一数字
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// 用当前时间戳+3位随机数，保证唯一性和随机性
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long timestamp = System.currentTimeMillis();
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String timePart = String.valueOf(timestamp);
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// 补足到16位
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StringBuilder numberPart = new StringBuilder(timePart);
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Random random = new Random();
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while (numberPart.length() < 16) {
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numberPart.append(random.nextInt(10));
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}
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// 如果超出16位则截取
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String finalNumber = numberPart.substring(0, 16);
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return codePrefix + finalNumber;
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}
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}
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