Java Servlets Programming

Duration:   3 days

Participants:   This course is intended for programmers who are familiar with Java and who want to begin coding Java server side programming.

Objectives:   Upon successful completion of this course you will be able to: -  Write servlets and JSPs that receive and send data to web pages. -  Write servlets that process an html form submitted by a web user. -  Access and update relational databases using Java servlets and JDBC. -  Use industry-tested design patterns to write multi-user Java servlets. -  Write servlets that use session variables and cookies to store user information to create "conversation-like" applications. -  Handle exceptions in your servlets code. -  Write modular servlets and transfer control between Java classes. -  Use JavaBeans to manage and transfer user data between application components. -  Learn the basics of servlets that apply to JSPs, which you will learn in the next course.

Overview:   This intensive hands-on course teaches developers to create Server-side Java programs using servlets. The foundations of this course are needed for follow-up courses such as JSPs, JSFs, and Struts. Extensive hands-on workshops will use either TextPad or Eclipse as the IDE, as well as Apache Tomcat and an RDBMS, such as MS Access or IBM DB2 for the relational database.

Prerequisites:   Experience developing Java programs, a basic understanding of JDBC, and ability to code basic HTML.

Future Courses for Additional Advanced Topics:   - Struts - JSPs (Java ServerPages) - JSFs (Java Server Faces) - OO and UML

Format:   Lecture and discussion with hands-on exercises.

Topics:   -  Process Users' Form Submissions         Your HTML forms can be submitted to a Java servlet on your server, which in turn will query databases, write data to files, and generate email messages based on the submitted information. Learn how to write servlets that process data submitted via the GET and POST methods, as well as data provided by hyperlinks, cookies, and session variables. -  Session Variables and Cookies         Create Applications that Use Session Variables and Cookies to Store Users' Preferences and Customize the Pages They See Accordingly         You will be able to store information from one page and retrieve it several pages later. (For example, you may store a user's ID after they log on to the site and use it as a key for identifying each item they order. When they check out, you can obtain this key from the cookie or session variable, retrieve the selected products from the database, and process their order.) -  Handle Exceptions and Errors in Your Code         Java features robust handling of exceptions (recoverable errors) that occur in your code. Learn how to use try-catch-finally blocks to appropriately handle exceptions that occur, and learn how to prevent errors, which your program cannot recover from, from occurring. -  Build Applications that Read From and Write To Files Using Classes in the java.io Package         Your Java programs need to be able to write information out to files in a structured format, and to retrieve and parse data from these files. Discover how the classes in the java.io package make this remarkably easy. -  Use Regular Expressions to Validate Users' Form Submissions         Regular expressions allow you to test whether a string of text matches a complex pattern. For example, you could validate a US Social Security Number to see whether it contains "3 digits-2 digits-4 digits." Learn the syntax of regular expressions and apply them to validate users' form submissions. -  Build Basic JavaBeans         JavaBeans technology allows you to build Java components that can quickly and easily be reused across a wide variety of applications. The last day of class will focus exclusively on successfully developing and using JavaBeans.

Course Outline:   -  Introduction and Overview         Web application development         Requirements of a Web application         Components of an n-tier architecture         Key components of J2EE for Web development         Servlets         JSP         XML -  Generating Content with Servlets         Getting started with servlets         Integrating servlets into the Web application architecture          Deploying servlets on various Web servers         Avoiding common servlet pitfalls         Utilizing the Java Servlet API         Servlet life cycle methods         Accessing servlet environment variables         Creating Web-based forms for user input         Adding text fields and drop-down lists         Linking forms to servlets          Retrieving form data in the servlet -  Accessing Enterprise Services with Servlets         Extending servlets with Java Database Connectivity (JDBC)         Connecting to the database         Submitting SQL statements         Retrieving and processing data         Formatting database results         Constructing an HTML table         Adding drill-down features -  Maintaining State in Java Web Applications         Reading and writing cookies to personalize Web content         Constructing cookies using the Java Servlet API         Retrieving cookies from a client request         Sending cookies to the client         Circumventing cookie limitations         Managing application state with sessions         Creating a unique session for each user         Storing and retrieving Java objects within sessions         Implementing a shopping cart         Controlling a session's life span -  Building Reusable JavaBeans Components         The component dream         Why components?         Review of JavaBeans

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