Java 自动生成16位Ling类型id

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自动生成16位Ling类型id

使用

ID16NumberGenerator.get16NumberID()

源码

package com.wangjikai.util;

import org.apache.commons.lang3.time.DateFormatUtils;

/*
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
*/
import java.util.*;

public class ID16NumberGenerator {
    private static ID16NumberGenerator instance = new ID16NumberGenerator();
    //private Logger logger = LoggerFactory.getLogger(this.getClass());
    private long time = 0L;
    private int seq = 101;

    private ID16NumberGenerator() {
    }

    public static Long get16NumberID() {
        ID16NumberGenerator var0 = instance;
        synchronized(instance) {
            return instance.generate16Id();
        }
    }

    public static int getNRdmNumber(int n) {
        if (n > 10) {
            n = 10;
        } else if (n < 1) {
            n = 1;
        }

        int min = (int)Math.pow(10.0D, (double)(n - 1));
        int max = (int)Math.pow(10.0D, (double)n) - 1;
        return getVectorNum(max, min);
    }

    public static Set<Long> get16NumberID(int count) {
        int size = count > 0 ? count : 1;
        TreeSet ids = new TreeSet();

        while(ids.size() < size) {
            ids.add(get16NumberID());
        }

        return ids;
    }

    private static synchronized int getVectorNum(int max, int min) {
        Random random = new Random();
        int s1 = random.nextInt(max) % (max - min + 1) + min;
        return s1;
    }



    public static String getPrchaseNum() {
        String timeString = DateFormatUtils.format(new Date(), "yyMMdd");
        String result = "CG" + timeString + getVectorNum(999999, 100000);
        return result;
    }

    private Long generate16Id() {
        long currentTime = System.currentTimeMillis();
        if (currentTime == this.time) {
            ++this.seq;
        } else {
            this.seq = 101;
            this.time = currentTime;
        }

        if (this.seq > 999) {
            try {
                Thread.sleep(1L);
            } catch (InterruptedException var4) {
                //this.logger.warn(var4.getMessage(), var4);
            }

            return this.generate16Id();
        } else {
            return this.time * 1000L + (long)this.seq;
        }
    }
    /**
     * 获取uuid
     *
     * @return uuid
     * */
    public static String getUuid(){
        // uuid
        String uuid = UUID.randomUUID().toString();
        return uuid;
    }
    
    public static void main(String[] arg) throws InterruptedException {

        for(int i = 0; i < 10; ++i) {
            System.out.println(ID16NumberGenerator.get16NumberID());
        }
        for(int i = 0; i < 10; ++i) {
           // System.out.println(getNRdmNumber(2));
            Thread.sleep(1);
            System.out.println(ID16NumberGenerator.get16NumberID());
        }
        System.out.println(ID16NumberGenerator.get16NumberID());


        Set<Integer> ints = new TreeSet();

        for(int i = 0; i < 10; ++i) {
            System.out.println(getNRdmNumber(2));
        }

        Iterator i$ = ints.iterator();

        while(i$.hasNext()) {
            Integer num = (Integer)i$.next();
            System.out.println(num);
        }

        System.out.println(ints.size());
    }
}