我用了半个小时 帮你写了一个简单的验证用户名和密码登陆问题 别辜负我的好意 下面是代码!（建好包和类 代码粘过去就能用）

实体类 包entity

-I used half an hour to help you write a simple user name and password authentication question my good intentions do not live up to the code below! (Build the package and stuck in the past will be able to use the class code) entity entity class package