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/*
 * Copyright (c) 2018-2019.‭‭‭‭‭‭‭‭‭‭‭‭[zuoqinggang] www.pingfangushi.com
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */


package cn.smallbun.scaffold.framework.common.toolkit;

import java.util.Random;

/**
 * 随机数
 * @author SanLi
 * Created by [email protected] / [email protected] on  2019/5/26
 */
public class RandomUtil {

	/**
	 * 生成六位随机数
	 *
	 * @return String
	 */
	public static String random() {

		StringBuilder buffer = new StringBuilder();
		//添加三位随机数
		//生成三个 0-9
		int num1, num2, num3, num4, num5, num6;
		Random rnd = new Random();
		num1 = rnd.nextInt(9);
		num2 = rnd.nextInt(9);
		num3 = rnd.nextInt(9);
		num4 = rnd.nextInt(9);
		num5 = rnd.nextInt(9);
		num6 = rnd.nextInt(9);

		String num = num1 + "" + num2 + "" + num3 + "" + num4 + "" + num5 + "" + num6;
		buffer.append(num);

		return buffer.toString();
	}

	/**
	 * 获得指定长度随机数
	 *
	 * @param length length
	 * @return String
	 */
	public static String random(int length) {
		String result = "";
		if (length > 0) {
			StringBuffer sb = new StringBuffer();
			Random rnd = new Random();
			for (int i = 0; i < length; i++) {
				int num = rnd.nextInt(9);
				sb.append(num);
			}
			result = sb.toString();
		}
		return result;
	}

	public static int randomSet(int lastNumber, int number) {
		Random random = new Random();
		int num = random.nextInt(number);

		while (num == lastNumber) {
			num = random.nextInt(number);
		}

		return num;
	}

}