com.yomahub.liteflow.util.SerialsUtil Maven / Gradle / Ivy
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package com.yomahub.liteflow.util;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* @author Yun
*/
public class SerialsUtil {
public static int serialInt = 1;
private static final DecimalFormat format8 = new DecimalFormat("00000000");
private static final DecimalFormat format12 = new DecimalFormat("000000000000");
private static final BigInteger divisor;
private static final BigInteger divisor12;
static {
divisor = BigInteger.valueOf(19999999L).multiply(BigInteger.valueOf(5));
divisor12 = BigInteger.valueOf(190000000097L).multiply(BigInteger.valueOf(5));
}
public static String genSerialNo() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String strNow = sdf.format(new Date());
// 生成3位随机数
Random random = new Random();
int intRandom = random.nextInt(999);
String strRandom = String.valueOf(intRandom);
int len = strRandom.length();
for (int i = 0; i < (3 - len); i++) {
strRandom = "0" + strRandom;
}
String serialStr = SerialsUtil.nextSerial();
return (strNow + strRandom + serialStr);
}
public static synchronized String nextSerial() {
int serial = serialInt++;
if (serial > 999) {
serialInt = 1;
serial = 1;
}
String serialStr = serial + "";
int len = serialStr.length();
for (int i = 0; i < (3 - len); i++) {
serialStr = "0" + serialStr;
}
return serialStr;
}
/**
* 生成一个12位随机数
* @param seed 种子值
* @return String 随机数
*/
public static String randomNum12(long seed) {
// 被除数
BigInteger dividend = BigDecimal.valueOf(seed).pow(5).toBigInteger();
return format12.format(dividend.remainder(divisor12));
}
/**
* 生成一个8位随机数
* @param seed 种子值
* @return String 随机数
*/
public static String randomNum8(long seed) {
// 被除数
BigInteger dividend = BigDecimal.valueOf(seed).pow(5).toBigInteger();
return format8.format(dividend.remainder(divisor));
}
/*
* 10进制转32进制(去除0,O,1,I)
*/
public static String from10To32(String numStr, int size) {
long to = 32;
long num = Long.parseLong(numStr);
String jg = "";
while (num != 0) {
switch (new Long(num % to).intValue()) {
case 0:
jg = "B" + jg;
break;
case 1:
jg = "R" + jg;
break;
case 2:
jg = "6" + jg;
break;
case 3:
jg = "U" + jg;
break;
case 4:
jg = "M" + jg;
break;
case 5:
jg = "E" + jg;
break;
case 6:
jg = "H" + jg;
break;
case 7:
jg = "C" + jg;
break;
case 8:
jg = "G" + jg;
break;
case 9:
jg = "Q" + jg;
break;
case 10:
jg = "A" + jg;
break;
case 11:
jg = "8" + jg;
break;
case 12:
jg = "3" + jg;
break;
case 13:
jg = "S" + jg;
break;
case 14:
jg = "J" + jg;
break;
case 15:
jg = "Y" + jg;
break;
case 16:
jg = "7" + jg;
break;
case 17:
jg = "5" + jg;
break;
case 18:
jg = "W" + jg;
break;
case 19:
jg = "9" + jg;
break;
case 20:
jg = "F" + jg;
break;
case 21:
jg = "T" + jg;
break;
case 22:
jg = "D" + jg;
break;
case 23:
jg = "2" + jg;
break;
case 24:
jg = "P" + jg;
break;
case 25:
jg = "Z" + jg;
break;
case 26:
jg = "N" + jg;
break;
case 27:
jg = "K" + jg;
break;
case 28:
jg = "V" + jg;
break;
case 29:
jg = "X" + jg;
break;
case 30:
jg = "L" + jg;
break;
case 31:
jg = "4" + jg;
break;
default:
jg = String.valueOf(num % to) + jg;
break;
}
num = num / to;
}
if (jg.length() < size) {
int loop = size - jg.length();
for (int i = 0; i < loop; i++) {
jg = "2" + jg;
}
}
return jg;
}
/*
* 10进制转32进制(去除0,O,1,I)
*/
public static String from10To24(String numStr, int size) {
long to = 24;
long num = Long.parseLong(numStr);
String jg = "";
while (num != 0) {
switch (new Long(num % to).intValue()) {
case 0:
jg = "B" + jg;
break;
case 1:
jg = "R" + jg;
break;
case 2:
jg = "U" + jg;
break;
case 3:
jg = "M" + jg;
break;
case 4:
jg = "E" + jg;
break;
case 5:
jg = "H" + jg;
break;
case 6:
jg = "C" + jg;
break;
case 7:
jg = "G" + jg;
break;
case 8:
jg = "Q" + jg;
break;
case 9:
jg = "A" + jg;
break;
case 10:
jg = "S" + jg;
break;
case 11:
jg = "J" + jg;
break;
case 12:
jg = "Y" + jg;
break;
case 13:
jg = "W" + jg;
break;
case 14:
jg = "F" + jg;
break;
case 15:
jg = "T" + jg;
break;
case 16:
jg = "D" + jg;
break;
case 17:
jg = "P" + jg;
break;
case 18:
jg = "Z" + jg;
break;
case 19:
jg = "N" + jg;
break;
case 20:
jg = "K" + jg;
break;
case 21:
jg = "V" + jg;
break;
case 22:
jg = "X" + jg;
break;
case 23:
jg = "L" + jg;
break;
default:
jg = String.valueOf(num % to) + jg;
break;
}
num = num / to;
}
if (jg.length() < size) {
int loop = size - jg.length();
for (int i = 0; i < loop; i++) {
jg = "B" + jg;
}
}
return jg;
}
public static String getUUID() {
UUID uuid = UUID.randomUUID();
String str = uuid.toString();
// 去掉"-"符号
String temp = str.substring(0, 8) + str.substring(9, 13) + str.substring(14, 18) + str.substring(19, 23)
+ str.substring(24);
return temp;
}
public static String generateShortUUID() {
String str = randomNum8(System.nanoTime());
return from10To24(str, 6);
}
public static String generateFileUUID() {
String str = randomNum12(System.nanoTime());
return from10To32(str, 8);
}
public static String genToken() {
return from10To32(randomNum12(System.currentTimeMillis()), 8) + from10To32(randomNum12(System.nanoTime()), 8);
}
public static void main(String[] args) {
Set set = new HashSet();
String str;
for (int i = 0; i < 300; i++) {
str = generateShortUUID();
System.out.println(str);
set.add(str);
}
System.out.println(set.size());
}
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