CS320 HW3

Homework 3
CS320, Spring 2006

Due: Saturday, May 6

Please upload your files using CSNS. The files should include all the source code, documentation, and an HTML file hw3.html, which contains a link to your JSP page on the CS server. Note that file uploading will be disabled automatically after 11:59PM of the due date, so please turn in your work on time.

[Reading]

Textbook - Chapter 10, 11, 12, 14, and 16.
J2EE Tutorial - Chapter 12 up to "Using Custom Tags", and the sections about JSTL Core and Functions in Chapter 14.
JSTL 1.1 Tag References - Again, only Core and Functions.

[JSP Blog Manager] (75pt)

Convert your blog servlet from Homework 2 to JSP. You do not have to implement any new features, however, your JSP implementation of the bookmark manager must meet the following requirements:

No scripting elements, which include JSP Expression, Scriptlet, and JSP Declaration. The only exception for this requirement is the Logout feature, which you may implement as

<%
    if( request.getParameter("logout") != null )
    {
        session.invalidate();
        response.sendRedirect("Login.jsp");
        return;
    }
%>

There are ways to get rid of this scriptlet too, but we'll have to wait until we discuss custom taglibs. Also note that comments and directives are not considered as scripting elements.

All features described in Homework 1 and Homework 2 must work in this implementation. Failing to meet this requirement will incur up to 40pt credit penalty.

[Return Statement] (5pt)

Note that there is a return statement in the logout scriptlet above. In your hw3.html, briefly discuss why the return statement is necessary, and what would happen if the statement is removed.

[NOTES]

Try use different JSP pages for different "views", e.g. login view or blog view or comment view etc. Generally speaking, it is easier to develop and maintain several simple JSPs than a single JSP with complex flow control.
Beans and other variables in session scope are shared by all JSP pages.
Good interface design will receive up to 20pt extra credit.
If you use session scope beans, the user added posts and/or comments may be lost after the user log out, and that's all right. We'll deal with this in the next assignment.