修复了用户名输入过短时注册不成功的BUG。
修复了用户名输入过短时注册不成功的BUG。

jaycial/Recommendation-System-Based-on-Latent-Factor,jaycial/Recommendation-System-Based-on-Latent-Factor,jaycial/Recommendation-System-Based-on-Latent-Factor