122 lines
3.3 KiB
Java
122 lines
3.3 KiB
Java
package com.fuint.utils;
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import java.math.BigInteger;
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import java.util.Calendar;
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import java.util.UUID;
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import java.util.concurrent.ThreadLocalRandom;
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/**
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* 序列工具类
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*
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* Created by FSQ
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* CopyRight https://www.fuint.cn
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*/
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public class SeqUtil {
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/**
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* 产生字符串序列(长度:32)
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*
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* @return String 32位字符串序列
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*/
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public static String getUUID() {
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String uuid = UUID.randomUUID().toString();
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return uuid.replaceAll("\\-", "").toUpperCase();
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}
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/**
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* 产生日期序列(长度:32)
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* [yyyyMMddHHmmssSSS+15位随机数]
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*
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* @return Long
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*/
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public static BigInteger getTimeSeq() {
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String date = CommonUtil.formatDate(Calendar.getInstance().getTime(), "yyyyMMddHHmmssSSS");
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StringBuilder sb = new StringBuilder();
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sb.append(date);
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int length = 32 - sb.length();
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String randNum = getRandomNumber(length);
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sb.append(randNum);
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return new BigInteger(sb.toString());
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}
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/**
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* 产生日期序列(长度:大于17位)
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* [yyyyMMddHHmmssSSS+15位随机数]
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*
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* @return Long
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*/
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public static String getTimeSeq(int length) {
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String date = CommonUtil.formatDate(Calendar.getInstance().getTime(), "yyyyMMddHHmmssSSS");
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StringBuilder sb = new StringBuilder();
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sb.append(date);
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length = length - sb.length();
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if (length > 0) {
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String randNum = getRandomNumber(length);
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sb.append(randNum);
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}
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return sb.toString();
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}
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/**
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* 根据客户自定义前缀获取序列(长度:32)
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* [前缀+yyyyMMddHHmmssSSS+随机数]
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*
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* @param prefix
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* @return String
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*/
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public static String getCustSeq(String prefix) {
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String date = CommonUtil.formatDate(Calendar.getInstance().getTime(), "yyyyMMddHHmmssSSS");
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StringBuilder sb = new StringBuilder(prefix);
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sb.append(date);
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int length = 32 - sb.length();
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String randNum = getRandomNumber(length);
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sb.append(randNum);
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return sb.toString();
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}
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/**
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* 产生指定长度随机字母
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*
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* @param length
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* @return String
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*/
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public static String getRandomLetter(int length) {
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String base = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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int rang = 26;
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ThreadLocalRandom rand = ThreadLocalRandom.current();
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < length; i++) {
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sb.append(base.charAt(rand.nextInt(rang)));
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}
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return sb.toString();
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}
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/**
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* 产生指定长度随机数字
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*
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* @param length
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* @return String
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*/
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public static String getRandomNumber(int length) {
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String base = "0123456789";
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int rang = 10;
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ThreadLocalRandom rand = ThreadLocalRandom.current();
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < length; i++) {
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sb.append(base.charAt(rand.nextInt(rang)));
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}
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return sb.toString();
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}
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/**
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* 产生指定区间的随机整数
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*
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* @param min
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* @param max
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* @return int
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*/
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public static int getRandomNumber(int min, int max) {
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ThreadLocalRandom rand = ThreadLocalRandom.current();
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return rand.nextInt(min, max);
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}
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} |