[JAVA][Java Servlet Programming].pdf

Java ä Servlet Programming

Exploring Java ä

Java ä Threads

Java ä Network Programming

Java ä Virtual Machine

Java ä AWT Reference

Java ä Language Reference

Java ä Fundamental Classes Reference

Database Programming with JDBC ä and Java ä

Java ä Distributed Computing

Developing Java Beans ä

Java ä Security

Java ä Cryptography

Java ä Swing

Java ä Servlet Programming

Also from O’Reilly

Java ä in a Nutshell

Java ä in a Nutshell, Deluxe Edition

Java ä Examples in a Nutshell

Java ä Servlet Programming

Jason Hunter

with William Crawford

Beijing • Cambridge • Farnham • Köln • Paris • Sebastopol • Taipei • Tokyo

Java ™Servlet Programming

by Jason Hunter with William Crawford

Printed in the United States of America.

Published by O’Reilly & Associates, Inc., 101 Morris Street, Sebastopol, CA 95472.

Editor: Paula Ferguson

Production Editor: Paula Carroll

Editorial and Production Services : Benchmark Productions, Inc.

Printing History:

October 1998:

First Edition

Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered

trademarks and The Java ™ Series is a trademark of O’Reilly & Associates, Inc. The association

of the image of a copper teakettle with the topic of Java ™ Servlet programming is a trademark

of O’Reilly & Associates, Inc. Java ™ and all Java-based trademarks and logos are trademarks

or registered trademarks of Sun Microsystems, Inc., in the United States and other countries.

O’Reilly & Associates, Inc. is independent of Sun Microsystems.

Many of the designations used by manufacturers and sellers to distinguish their products are

claimed as trademarks. Where those designations appear in this book, and O’Reilly &

Associates, Inc. was aware of a trademark claim, the designations have been printed in caps

or initial caps.

While every precaution has been taken in the preparation of this book, the publisher assumes

no responsibility for errors or omissions, or for damages resulting from the use of the

information contained herein.

ISBN: 1-56592-391-X

[1/00]

[M]

opd

Table of Contents

Preface ............................................................................................................................. ix

1. Introduction ..................................................................................................... 1

History of Web Applications ............................................................................... 1

Support for Servlets ............................................................................................. 7

The Power of Servlets ........................................................................................ 10

2. HTTP Servlet Basics ................................................................................... 14

HTTP Basics ....................................................................................................... 14

The Servlet API .................................................................................................. 17

Page Generation ................................................................................................ 19

Server-Side Includes .......................................................................................... 27

Servlet Chaining and Filters ............................................................................. 30

JavaServer Pages ................................................................................................. 37

Moving On ......................................................................................................... 46

3. The Servlet Life Cycle ................................................................................ 48

The Servlet Alternative ...................................................................................... 48

Servlet Reloading ............................................................................................... 55

Init and Destroy ................................................................................................. 56

Single-Thread Model ......................................................................................... 62

Background Processing ..................................................................................... 64

Last Modified Times .......................................................................................... 67

Java™ Servlet Programming, eMatter Edition

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