首先通过登录才能访问系统,密码错误返回提示信息,基于c/s结构的音乐共享平台,禁止使用数据库,没有用户名的用户可以使用窗口注册-First be logged in to access the system, the password is wrong return message, music sharing platform based on the c/s structure, prohibit the use of the database user name user can use