1.新建项目

编写代码，导入必要的jar包，

右键点击项目，然后export，选择main函数，

package utils;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Random;

import com.github.javafaker.Faker;

public class GenerateId {

   public static void main(String[] args) {
       System.out.println(getEepidNumber());
   }

   public static String getEepidNumber() {
   SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
   String formatStr = dateFormat.format(new Date());

   System.out.println(formatStr);
String HMS = formatStr.replace(":", "").trim();
   System.out.println(HMS);
   Faker faker = new Faker(new Locale("en", "US"));
String newValue = "CB" + HMS + faker.regexify("[0-9]{1}");
System.out.println(newValue);
return newValue;
   }

   public static String generateChinaId() {
   int year =1970 +new Random().nextInt(30);
   int month =1 +new Random().nextInt(12);
   int day =1 +new Random().nextInt(28);
       String randomBirthday=String.format("%04d%02d%02d", year, month, day);

   int order =1000 +new Random().nextInt(8999);
   String randomOrder=String.valueOf(order);

       return "440981"+randomBirthday+randomOrder;
   }
public static String generateHKID() {
String prefix = generateOneCharacter();
String serial = generate6Number();
String r = generateValidate(prefix, serial);
return r;
}

public static String generateOneCharacter() {
Random random = new Random();
char upperCaseLetter = (char) ('A' + random.nextInt(26)); // 生成一个大写字母 'A'-'Z'
return upperCaseLetter+"";
}

public static String generate6Number() {
int min = 100000;
int max = 999999;
int a = (int) (Math.random()*(max-min +1)) + 100000;
return ""+a;
}

public static String generateValidate(String prefix, String serial) {
String prefixU = prefix.toUpperCase();
long value = 0;
if (prefixU.length() == 2) {
value += (prefixU.charAt(0) - 55) * 9 + (prefixU.charAt(1) - 55) * 8;
} else if (prefixU.length() == 1) {
value += 36 * 9 + (prefixU.charAt(0) - 55) * 8;
}
for (int i = 0; i < 6; i++) {
value += Integer.parseInt(serial.substring(i, i + 1)) * (7 - i);
}
long reminder = value % 11;
long validCheckDigit = 11 - reminder;
String last = "";
if ( validCheckDigit == 11) {
last="0";
}else if ( validCheckDigit == 10) {
last="A";
}else {
last = validCheckDigit+"";
}
String result= prefix + serial + "(" + last + ")";
return result;
}