用户登录与注册，登录成功后可以读取制定html文件，图片-User login and registration, developed after a successful login can read html files, pictures

java邮箱 本邮箱使用HTML界面设计，包含功能：邮箱的登入与注册，邮件的收发，附件的发送与接受！-java mailbox The mailbox using HTML interface design, including features: mailbox login and registration, send and receive mail, send and receive attachments!