RandomUtil.java

package com.subsidy.util;

import cn.hutool.core.lang.UUID;

import java.util.Date;
import java.util.Random;

public class RandomUtil {

    public static int getCode() {
        return (int)((Math.random() * 9 + 1) * 100000);
    }

    public static String randomPass(Integer count) {
        StringBuffer stringBuffer = new StringBuffer();
        Random random = new Random(new Date().getTime());
        String flag = type[random.nextInt(type.length)];
        int length = count;
        for (int i = 0; i < length; i++) {
            switch (flag) {
                case "word":
                    stringBuffer.append(word[random.nextInt(word.length)]);
                    break;
                case "num":
                    stringBuffer.append(num[random.nextInt(num.length)]);
                    break;
                case "symbol":
                    stringBuffer.append(symbol[random.nextInt(symbol.length)]);
                    break;
                default:
                    break;
            }
            flag = type[random.nextInt(type.length)];
        }
        return stringBuffer.toString();
    }


    public static String getRandomCode(int randomLength) {
        StringBuilder str = new StringBuilder();
        Random random = new Random();
        for (int i = 0; i < randomLength; i++) {
            str.append(random.nextInt(10));
        }
        return str.toString();
    }


    /**
     * 随机生成订单号
     */
    public static String  randomOrderNumber(){
        return UUID.fastUUID().toString().replace("-","").substring(0,29);
    }

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


    public final static String[] type = {
            "word", "num", "symbol"
    };

    public final static String[] word = {
            "a", "b", "c", "d", "e", "f", "g",
            "h", "j", "k", "m", "n",
            "p", "q", "r", "s", "t",
            "u", "v", "w", "x", "y", "z",
            "A", "B", "C", "D", "E", "F", "G",
            "H", "J", "K", "M", "N",
            "P", "Q", "R", "S", "T",
            "U", "V", "W", "X", "Y", "Z"
    };

    public final static String[] num = {
            "1", "2", "3", "4", "5", "6", "7", "8", "9"
    };

    public final static String[] symbol = {
            "!", "@", "#", "$", "%", "&"
    };
}