How to create a login............

Question

Hi
i am new to using JSP and i don't know how to create a user login page. A DBHandler holds all the connection and SQL queries to my database. Within the DBHandler i have Login.java which carries the login info for the JDBC connection. Login.java code is below. Can i use something like for my user login?
public class Login
private String username;
private String password;
Constructor to create a new login object
@param u valid database username.
@param p valid database password.
public Login(String u, String p)
     username = u;
     password = p;
Gets the username.
@return the username as a string
protected String getUser()
     return username;
Gets the password
@return the password as a string.
protected String getPassword()
     return password;
Thanks

Answer 1

With what you have, you can have a login page that is simply a basic HTML page with form fields for login and password. You can post this form to another JSP page to actually do the validation. Once you've validated that the login/password they provided you can then either forward back to the logn page if it is incorrect, or store an attribute in the session to record that they have successfully logged in, and forward to the main page using session.setAttribute("user", userName) or something like that.
Then every page can include a simply jsp that checks to see if the attribute "user" exists in the session, and if not, it can forward to the login page. When the user clicks logout, a simple call to session.invalidate() will invalidate the session, and any further attempts to access pages would result in being forwarded back to the login page.