com.fengduo.bee.commons.core.utils.Identities.java Source code

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Here is the source code for com.fengduo.bee.commons.core.utils.Identities.java

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/*
 * Copyright 2015-2020 Fengduo.com All right reserved. This software is the confidential and proprietary information of
 * Fengduo.com ("Confidential Information"). You shall not disclose such Confidential Information and shall use it only
 * in accordance with the terms of the license agreement you entered into with Fengduo.com.
 */
package com.fengduo.bee.commons.core.utils;

import java.security.SecureRandom;
import java.util.Date;
import java.util.Random;
import java.util.UUID;

import org.apache.commons.lang.math.RandomUtils;
import org.apache.commons.lang.time.DateFormatUtils;

/**
 * ????ID.
 * 
 * @author zxc May 28, 2015 4:06:35 PM
 */
public class Identities {

    private static SecureRandom random = new SecureRandom();

    /**
     * ??n?
     */
    public static String randomNum(int n) {
        Random r = new Random(System.currentTimeMillis());
        StringBuffer buf = new StringBuffer(n);
        for (int i = 0; i < n; i++) {
            buf.append(r.nextInt(10));
        }
        return buf.toString();
    }

    /**
     * ?JDKUUID, Random?, -.
     */
    public static String uuid() {
        return UUID.randomUUID().toString();
    }

    /**
     * ?JDKUUID, Random?, -.
     */
    public static String uuid2() {
        return UUID.randomUUID().toString().replaceAll("-", "");
    }

    /**
     * SecureRandom??Long.
     */
    public static long randomLong() {
        return Math.abs(random.nextLong());
    }

    /**
     * Base62?SecureRandom??bytes.
     */
    public static String randomBase62(int length) {
        byte[] randomBytes = new byte[length];
        random.nextBytes(randomBytes);
        return Encodes.encodeBase62(randomBytes);
    }

    public static final String PURE_MIDDLE_DATE_TIME_FORMAT_STR = "yyyyMMddHHmm";

    public final static String getVehicleCode() {
        Random random = new Random();
        return DateFormatUtils.format(new Date(), PURE_MIDDLE_DATE_TIME_FORMAT_STR)
                + RandomUtils.nextInt(random, 10) + RandomUtils.nextInt(random, 10);
    }

    public final static String getTimestampUUID() {
        return DateFormatUtils.format(new Date(), PURE_MIDDLE_DATE_TIME_FORMAT_STR) + RandomUtils.nextInt(10);
    }
}