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    Head First Servlets and JSP™
    Dedication
    A Note Regarding Supplemental Files
    Praise for Head First Servlets and JSP™
    Praise for the Head First approach
    Perpetrators of the Head First series (and this book)
    How to Use this Book: Intro
    1. Intro and Overview: Why use Servlets & JSPs?
    Everybody wants a web site
    What does your web server do?
    What does a web client do?
    Clients and servers know HTML and HTTP
    Two-minute HTML guide
    What you write... (the HTML)
    What the browser creates...
    What is the HTTP protocol?
    HTML is part of the HTTP response
    If that’s the response, what’s in the request?
    GET is a simple request, POST can send user data
    It’s true... you can send a little data with HTTP GET
    Anatomy of an HTTP GET request
    Anatomy of an HTTP POST request
    Anatomy of an HTTP response, and what the heck is a “MIME type”?
    All the pieces. On one page.
    URL. Whatever you do, don’t pronounce it “Earl”.
    Directory structure for a simple Apache web site
    Web servers love serving static web pages
    But sometimes you need more than just the web server
    Two things the web server alone won’t do
    The non-Java term for a web server helper app is “CGI” program
    Servlets Demystified (write, deploy, run)
    JSP is what happened when somebody introduced Java to HTML
    2. High-Level Overview: Web App Architecture
    3. Hands-on MVC: Mini MVC Tutorial
    4. Request and Response: Being a Servlet
    5. Attributes and Listeners: Being a Web App
    6. Session Management: Conversational state
    7. Using JSP: Being a JSP
    8. Scriptless JSP: Script-free pages
    9. Using JSTL: Custom tags are powerful
    10. Custom Tag Development: When even JSTL is not enough...
    11. Web App Deployment: Deploying your web app
    12. Web App Security: Keep it secret, keep it safe
    13. Filters and Wrappers: The Power of Filters
    14. Patterns and Struts: Enterprise Design Patterns
    A. Final Mock Exam: Coffee Cram
    B.
    C.
    Index
    About the Authors
    Copyright
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    1. Intro and Overview: Why use Servlets & JSPs?

    Chapter 1. Intro and Overview: Why use Servlets & JSPs?

    image with no caption

    Web applications are hot. Sure, GUI applications might use exotic Swing widgets, but how many GUI apps do you know that are used by millions of users worldwide? As a web app developer, you can free yourself from the grip of deployment problems all standalone apps have, and deliver your app to anyone with a browser. But to build a truly powerful web app, you need Java. You need servlets. You need JSPs. Because plain old static HTML pages are so, well, 1999. Today’s users expect sites that are dynamic, interactive, and custom-tailored. Within these pages you’ll learn to move from web site to web app.

    OBJECTIVES

    Servlets & JSP overview

    1.1

    For each of the HTTP Methods (such as GET, POST, HEAD, and so on):


      

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