PDF UPLOAD AND DOWNLOAD (JAVA EE application)

I require Java Jsp servlet code. I am using Eclipse JUNO, MySQL workbench, Apache Tomcat 7 server.

Problem:
Code must have “.pdf” file upload, file view on webpage and download via button click on webpage.
My table is user_pdf with a column called pdf_name (primary key).

JSP page “userpdf.jsp” with following elements:

    <form action="LastServlet" method="post" encType="multipart/form-data">        
    Select the file to upload

    <input type="file">

    <input type="submit" name="s" value="submit"> 

    </form>
    <a href="#">Download pdf</a>

Another issue:-
I would like to know how to code to display a pdf file(whose pdf_name is stored in a MySQL table user_pdf) in a section of my webpage(say webpage is divided into two sections vertically).

You should try using stackoverflow.com for such questions.