User login registration instance based on Io Version (Java)

What I learned today is the user login and registration function.

4 packages:

itcast. cn. User package user Java user class, which describes basic user information, including member variables, parameterless constructors, parameterless constructors (optional). Get and set methods

tcast. cn. Uerdao package userdao Java defines an interface to declare the login and registration function

itcast. cn. Userdaoimpl package userdaoimpl Java implements the userdao interface, which specifically describes the login registration method.

It should be noted that in the login method, the return value boolean flag = true means that the login is successful

One thing to note in the implementation process is that the declarations of global variables BR and BW must be placed outside the try braces

The implementation method code of IO version is as follows:

itcast. cn. Usertest package usertest class

There is an unresolved problem in this class:

The scanner function cannot input one by one. In addition, the (true) in the constructor method needs to be seen more.

The above user login registration example (Java) based on Io version is all the content shared by Xiaobian. I hope it can give you a reference and support more programming tips.