Josh Juneau - Java EE to Jakarta EE 10 Recipes: A Problem-Solution Approach for Enterprise Java

Java EE to Jakarta EE 10 Recipes A Problem-Solution Approach for Enterprise Java Third Edition Josh Juneau Tarun Telang Java EE to Jakarta EE 10 Recipes: A Problem-Solution Approach for Enterprise Java Josh Juneau Tarun Telang Hinckley, IL, USA Hyderabad, Telangana, India ISBN-13 (pbk): 978-1-4842-8078-2 ISBN-13 (electronic): 978-1-4842-8079-9 https://doi.org/10.1007/978-1-4842-8079-9 Copyright 2022 by Josh Juneau and Tarun Telang This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. Trademarked names, logos, and images may appear in this book. Rather than use a trademark symbol with every occurrence of a trademarked name, logo, or image we use the names, logos, and images only in an editorial fashion and to the benefit of the trademark owner, with no intention of infringement of the trademark. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. While the advice and information in this book are believed to be true and accurate at the date of publication, neither the authors nor the editors nor the publisher can accept any legal responsibility for any errors or omissions that may be made.

The publisher makes no warranty, express or implied, with respect to the material contained herein. Managing Director, Apress Media LLC: Welmoed Spahr Acquisitions Editor: Steve Anglin Development Editor: Laura Berendson Coordinating Editor: Mark Powers Cover designed by eStudioCalamar Cover image by Said Alamri on Unsplash (www.unsplash.com) Distributed to the book trade worldwide by Apress Media, LLC, 1 New York Plaza, New York, NY 10004, U.S.A. Phone 1-800-SPRINGER, fax (201) 348-4505, e-mail orders-ny@springer-sbm.com, or visit www. springeronline.com. Apress Media, LLC is a California LLC and the sole member (owner) is Springer Science + Business Media Finance Inc (SSBM Finance Inc). SSBM Finance Inc is a Delaware corporation.

For information on translations, please e-mail booktranslations@springernature.com; for reprint, paperback, or audio rights, please e-mail bookpermissions@springernature.com. Apress titles may be purchased in bulk for academic, corporate, or promotional use. eBook versions and licenses are also available for most titles. For more information, reference our Print and eBook Bulk Sales web page at http://www.apress.com/bulk-sales. Any source code or other supplementary material referenced by the author in this book is available to readers on GitHub (https://github.com/Apress). apress.com/source- code. apress.com/source- code.

Printed on acid-free paper This book is dedicated to my wife Angela and my five children: Kaitlyn, Jacob, Matthew,Zachary, and Lucas. You are my joy and inspiration. It is also dedicated to the manyJava developers worldwide. I hope that these recipes can lead you to developing thesophisticated solutions of tomorrow.Josh JuneauThis book is dedicated to my grandparents, parents, wife Nikita, and son Vihan.They have always been a source of inspiration and encouragement to me. It's also for all ofthe software and technology creators who work hard to make our planet a better place to live.Tarun TelangTable of Contents About the Authors xxxvii About the Technical Reviewer xxxix Acknowledgments xli Introduction xliii Chapter 1: Jakarta Servlets 1 1 -1. 2 Problem .................................................................................................................................................. 2 Solution................................................................................................................................................... 2 How It Works ........................................................................................................................................... 3 1 -2. 3 1 -2.

Developing a Servlet ................................................................................................. 4 Problem .................................................................................................................................................. 4 Solution................................................................................................................................................... 4 How It Works ........................................................................................................................................... 7 1 -3. 8 Problem .................................................................................................................................................. 8 Solution................................................................................................................................................... 8 How It Works ........................................................................................................................................... 9 1 -4. 9 1 -4.

Registering a Servlet Without web.xml ................................................................... 11 Problem ................................................................................................................................................ 11 Solution................................................................................................................................................. 11 How It Works ......................................................................................................................................... 12 v Table of ConTenTs 1 -5. 13 Problem ................................................................................................................................................ 13 Solution................................................................................................................................................. 13 How It Works ......................................................................................................................................... 15 1-6. 15 1-6.

Handling Requests and Responses ......................................................................... 15 Problem ................................................................................................................................................ 15 Solution................................................................................................................................................. 15 How It Works ......................................................................................................................................... 17 1 -7. 18 Problem ................................................................................................................................................ 18 Solution................................................................................................................................................. 18 How It Works ......................................................................................................................................... 21 1-8. 21 1-8.

Setting Initialization Parameters ............................................................................. 22 Problem ................................................................................................................................................ 22 Solution #1............................................................................................................................................ 22 Solution #2............................................................................................................................................ 23 How It Works ......................................................................................................................................... 23 1 -9.