使用函数方式生成UUID

public static void main(String[] args){
    String  uuid = UUID.randomUUID().toString();
    System.out.println(uuid);
}

//打印结果：c91e4624-96fb-4fc4-bcc1-8a597a3f53b8

public static void main(String[] args){
    String  uuid = UUID.randomUUID().toString().replace("-", "");
    System.out.println(uuid);
}

//打印结果：c91e462496fb4fc4bcc18a597a3f53b8