@Override
    public SysUserEntity register(String mobile, String password) {
        SysUserEntity user = this.getOne(Wrappers.<SysUserEntity>lambdaQuery().eq(SysUserEntity::getUsername, mobile).or().eq(SysUserEntity::getMobile, mobile));
        if(user==null) {
            user = new SysUserEntity();
            user.setCreateTime(new Date());
            user.setUsername(mobile);
            user.setMobile(mobile);
            user.setStatus(0);
            // sha256加密
            String salt = RandomStringUtils.randomAlphanumeric(20);
            //user.setPassword(new Sha256Hash(user.getPassword(), salt).toHex());
            user.setPassword(new Sha256Hash(password, salt).toHex());
            user.setSalt(salt);
            this.save(user);
            return user;
        }
        else
            return null;
    }
运行这段代码后，user_id就被写入了，比如：“1512315290730979329”“1512316933539115009”，这是如何写数据库的呢？有人说是 雪花算法，可就算是雪花算法，是不是也要在哪里设置啊？数据库只设置了自动递增


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FROM 120.242.253.*