The O'Reilly logo is a registered trademark of O'Reilly Media, Inc. The Head First Head First Servlets and JSP™, Second Edition, and related trade dress are. Head First SQL is at the top of my stack. Heck, even the PDF I have for review is tattered Head O'Reilly - Head First Servlets and JSP, 2nd Edition. Praise for Head First Servlets and JSP™. “This Head First Servlets book is as good as theHead First EJB book, which made me laugh AND.
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Automatically exported from canlirecvima.tk - dieforfree/ edsebooks. Head First Servlets and JSP, 2nd Edition. 57 reviews. by Bert Bates, Bryan Basham, Kathy Sierra. Publisher: O'Reilly Media, Inc. Release Date: March Want to get to know the latest (J2EE ) versions of Servlets and JSPs so well that you can pass the Sun Certified Web Component Developer (SCWCD)
But you need servlets and JSPs. Because plain old static HTML pages are so, well, Learn to move from web site to web app. Exam objectives 2 What web servers and clients do, and how they talk?
When a request comes in, somebody has to instantiate the servlet or at least allocate a thread to handle the request. Somebody has to get the request and the response to the servlet.
Somebody has to manage the life, death, and resources of the servlet. Exam Objectives 38 What is a Container and what does it give you? Time to build it, deploy it, and test it. Next, you need to set up your deployment environment following the servlet and JSP specs and Tomcat requirements. True, this is a small app The request might be simple: And your servlet code has to know how to send a response. Or not You have models, controllers, and views.
You have parameters and attributes. You have helper classes. But how do you tie the pieces together? How do you let components share information? How do you hide information?
How do you make information thread-safe? Your job may depend on the answers. As soon as they send you a response, they forget who you are. But sometimes you need to keep conversational state with the client across multiple requests. You can write Java code in your JSP, but should you? And if not Java code, what do you write?
Murach’s Java Servlets and JSP, 2nd Edition
How does it translate into Java code? Do your web page designers really have to know Java? Do they expect server-side Java programmers to be, say, graphic designers? But there are some traps Sometimes EL behaves differently than if you used the same syntax in Java, so pay attention! Exam Objectives When attributes are beans Standard actions: What if you want to loop through the data in an array, and display one item per row in an HTML table? You know you could write that in two seconds using a for loop in a scriptlet.
No problem. That way, your page designers can use your tag in their pages, while all the hard work is done behind the scenes in your tag handler class. Of the three, two were introduced with JSP 2. Exam Objectives Tag Files: Your pages are polished, your code is tested and tuned, and your deadline was two weeks ago. But where does everything go? So many directories, so many rules.
What do you name your directories? What does the client actually request, and how does the Container know where to look? Exam Objectives Key deployment task, what goes where?
Trouble lurks in every corner of the network. Does Jim in marketing really need to know that Lisa in engineering makes three times as much as he does? HTTPS to the rescue Data confidentiality and integrity sparingly and declaratively 13 The power of filters Filters let you intercept the request. And if you can intercept the request, you can also control the response. And best of all, the servlet remains clueless.
What does that mean to you? More vacations. Want to add user request tracking to every servlet in your app? Manipulate the output from every servlet in your app? Exam Objectives Hardware and software forces behind patterns Review of softweare design principles MVC Yes!
This is it.
We know. Sometimes you need more than EL or standard actions. The JSTL 1. Having access to 9. JSTL v1. That means each web app needs a copy.
Copy the files from the Tomcat examples at: I want to show one element per row in a table EL and standard actions are limited What happens when you bump into a brick wall?
Developers usually want way more standard actions or—even better—the ability to create their own actions. And you can. For the JSP page creator, custom tags are much easier to use than scripting. For the Java programmer, however, building the custom tag handler the Java code invoked when a JSP uses the tag is tougher. Still, there could be times when you need something from, say, a custom tag library developed specifically for your company.
The case of the disappearing HTML reprised On page , you saw how EL sends the raw string of content directly to the response stream: Tip of the Day: What we need is a way to convert those angle brackets into something the browser will render as angle brackets, and there are two ways to do this.
You can explicitly declare the conversion of XML entities If you know or think you might run into some XML entities that need to be displayed, and not just rendered, you can use the escapeXml attribute on c: Setting this to true means that any XML will be converted to something the web browser will render, angle brackets and all: In that case, you can turn off XML conversion: Which HTML special characters are converted?
Character Character Entity Code A: It turns out this conversion is rather simple. She noticed that we were using EL everywhere to output strings entered by users.
She said this was a security risk and recommended we output all user strings using the c: What gives? Your consultant was right. Includes and imports can be messy Tag Files: A tag with dynamic row data: SkipPageException shows everything up to the point of the exception But what happens when the tag is invoked from an included page?
We could just add more custom tag attributes But what if you DO need access to the body contents?
A Tag can call its Parent Tag Find out just how deep the nesting goes Mock Exam Chapter 10 Coffee Cram: Mock Exam Chapter 11 Coffee Crem: Keep security out of the code! Who implements security in a web app? Customizing methods: Mock Exam Chapter 12 Coffee Cram: Chapter 12 Answers Chapter 13 Filters and Wrappers: As of version 2.
The output has left the building We can implement our OWN response Wrappers rock Adding a simple Wrapper to the design Add an output stream Wrapper The real compression filter code Compression wrapper code Compression wrapper, helper class code Coffee Cram: Mock Exam Chapter 13 Coffee Cram: Chapter 13 Answers Chapter 14 Patterns and Struts: More design principles Time for a Transfer Object?
Head First Servlets and JSP
Business tier patterns: How does Front Controller fit in? Mock Exam Chapter 14 Coffee Cram: Coffee Cram Coffee Cram: Final Mock Exam Coffee Cram: Thanks for your feedback.
Thanks, Best regards. Hi Bert, Just to add more info for others.. Is the below Ok? According to http: Servlets 3. Mike P Ryan. Mohamed Iqzas. This book may not be enough for the Oracle Exam. But for those who use this book to learn the technology this book is fair enough no, actually excellent.
If you get the basics and techniques used in this book right, then it is easy to catch up with the later additions to J2EE. Andy Jack.I took it to the gym and I expect people saw me smiling a lot while I was exercising and reading. Download pdf. Help Center Find new research papers in: Even attribute. The best part: Your pages are polished, your code is tested and tuned, and your deadline was two weeks ago.
You're over the legal limit for caffeine. You're working on a deadline. Readers of this book should be advised that the authors hope you remember them, should you create a huge, successful dotcom as a result of reading this book.
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