package com.nz;

import java.util.Random;

import java.util.UUID;

public class GeneralUtil {

public static Random random = new Random();

//生成UUID

public static String getUUID() {

String uuid = UUID.randomUUID().toString().replaceAll("-","");

return uuid;

}

//生成4位验证码

public static String generateCode(){

String str = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int length = str.length();

StringBuffer sb = new StringBuffer();

for(int i=0;i<4;i++){

int index = random.nextInt(length);

char c = str.charAt(index);

sb = sb.append(c);

}

return sb.toString();

}

}