Send data from bean to servlet and get results back to bean

Question

Hi,
I'm new to this helpful forum and, as long as I'm practicing with JFS and Java Beans and Servlets, I really need some help about the following crappy issue.
I made a JSP login page called "LoginPage.jsp" (using "Visual Web JSF Page" tool in NetBeans 6.0), and the action associated to the "Login" button pression is defined in the associated Java Bean "LoginPage.java":
Code from "LoginPage.jsp":
<webuijsf:button actionExpression="#{LoginPage.loginButton_action}" binding="#{LoginPage.loginButton}" id="loginButton" primary="true" style="height: 24px; left: 383px; top: 192px; position: absolute; width: 96px" text="Login"/>
Code from "LoginPage.java":
public String loginButton_action()
    if (usernameField.equals("guest") && passwordField.equals("guest")) // this control should be done by a servlet, not here!
        return "loginOK"; // this is the outcome for faces-config.xml that will lead to a "Welcome.jsp" page
    else
        return "loginERROR"; // this is the outcome for faces-config.xml that will lead to a "Error.jsp" page
...Now, the problem is that the username and password control should not be done by the bean itself, but by a servlet (call it "LoginServlet.java").
In a few words, what I mean is that once the user writes username and password and presses the "Login" button, the called "loginButton_action()" forwards all the needed data to the servlet "LoginServlet.java", the servlet does the complete checks about login validity then prepares the result (it could be a string reporting "OK" or whatever else) and send it back to the bean "LoginPage.java", so that the flow can continue.
My problem is that I absolutely don't know how to make a bean and a servlet communicate in both ways and respectively exchange data.
Thanks in advance for any help, it will really be appreciated.

Answer 1

Google for passing values in request and session.