com.github.commons.utils.SerialNo Maven / Gradle / Ivy

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package com.github.commons.utils;

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

public final class SerialNo {

    public SerialNo() {
    }

    public static synchronized String getUNID() {
        String currentTime = getCurrentDateString("yyMMddHHmmssSSS");
        if (compareTime == null || compareTime.compareTo(currentTime) != 0) {
            compareTime = currentTime;
            sequence = 1L;
        } else {
            sequence++;
        }
        return (new StringBuilder(String.valueOf(currentTime))).append(
                numberFormat.format(sequence)).toString();
    }

    public static synchronized String getDateID() {
        String currentTime = getCurrentDateString("yyyyMMdd");
        if (compareTime == null || compareTime.compareTo(currentTime) != 0) {
            compareTime = currentTime;
            sequence = 1L;
        } else {
            sequence++;
        }
        return (new StringBuilder(String.valueOf(currentTime))).append(
                numberFormat.format(sequence)).toString();
    }

    /**
     * 字符串长度为30
     * @return String 流水号
     */
    public static synchronized String getLongUNID() {
        String currentTime = getCurrentDateString("yyyyMMddHHmmssSSS");
        if (longTime == null || longTime.compareTo(currentTime) != 0) {
            longTime = currentTime;
            longSequence = 1L;
        } else {
            longSequence++;
        }
        return (new StringBuilder(String.valueOf(currentTime))).append(
                longFormat.format(longSequence)).toString();
    }

    public static String getSerialforDB() {
        return getCurrentDateString("yyMMddHHmmssSSS");
    }

    public static String getShortSerial() {
        return getCurrentDateString("mmssSSS");
    }

    public static synchronized String getSmallUNID() {
        String currentTime = getCurrentDateString("yyMMddHHmmss");
        if (smallTime == null || smallTime.compareTo(currentTime) != 0) {
            smallTime = currentTime;
            smallSequence = 1L;
        } else {
            smallSequence++;
        }
        return (new StringBuilder(String.valueOf(currentTime))).append(
                smallFormat.format(smallSequence)).toString();
    }

    private static long sequence;
    private static String compareTime;
    private static NumberFormat numberFormat;
    private static long smallSequence;
    private static String smallTime;
    private static NumberFormat smallFormat;

    private static long longSequence;
    private static String longTime;
    private static NumberFormat longFormat;

    static {
        numberFormat = NumberFormat.getInstance();
        numberFormat.setGroupingUsed(false);
        numberFormat.setMinimumIntegerDigits(5);
        numberFormat.setMaximumIntegerDigits(5);
        smallFormat = NumberFormat.getInstance();
        smallFormat.setGroupingUsed(false);
        smallFormat.setMinimumIntegerDigits(4);
        smallFormat.setMaximumIntegerDigits(4);
        longFormat = NumberFormat.getInstance();
        // 是否允许分组 1123456=》1,123,456
        longFormat.setGroupingUsed(false);
        // 允许小整数位数
        longFormat.setMinimumIntegerDigits(13);
        // 允许大整数位数
        longFormat.setMaximumIntegerDigits(13);
    }

    private static String getCurrentDateString(String formatString) {
        Date currentDate = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat(formatString,
                Locale.PRC);
        return dateFormat.format(currentDate);
    }

    /*public static void main(String[] args) {
        String pk = SerialNo.getLongUNID();
        System.out.println(pk);
        System.out.println(pk.length());
        String unid = SerialNo.getUNID();
        System.out.println(unid);
        System.out.println(unid.length());
        String shot = SerialNo.getShortSerial();
        System.out.println(shot);
        for (int i = 0; i < 100000; i++) {
            String small = SerialNo.getSmallUNID();
            System.out.println(small);
        }
    }*/
}