import java.util.Random;
import java.util.UUID;
/*
* 類描述:生成
* @auther wangmx
* @create 2018/1/24 0024
*/
public class Uuid {
//uuid
public static String getUUid(){
String id = UUID.randomUUID().toString().replaceAll("-", "");
return id;
}
//六位随機數
public static String getRandomNum(int pwd_len){
//35是因為數組是從0開始的,26個字母+10個數字
final int maxNum = 36;
int i; //生成的随機數
int count = 0; //生成的密碼的長度
char[] str = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
StringBuffer pwd = new StringBuffer("");
Random r = new Random();
while(count < pwd_len){
//生成随機數,取絕對值,防止生成負數,
i = Math.abs(r.nextInt(maxNum)); //生成的數最大為36-1
if (i >= 0 && i < str.length) {
pwd.append(str[i]);
count ++;
}
}
return pwd.toString();
}
}