Introduction to Java Web Programming Gregg Sporar

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Presentation transcript:

Introduction to Java Web Programming Gregg Sporar

2 Agenda ● What is Java? ● Web/Application Servers ● Servlets ● JSPs ● Java Web Frameworks ● JavaServer Faces ● Beyond the Java Language

3 What is Java? ● Runs Everywhere ● and Open Source

4 Java Flavors Optional Packages Java Enterpris e Edition (Java EE) Java Standard Edition (Java SE) JVM Java Card APIs CardVM Optional Packages Personal Basis Profile Personal Profile Foundation Profile CDC MIDP CLDC KVM Java Micro Edition (Java ME)

5 “Hello World” in Java

6 A Specification...

7 Web/Application Servers Clien t Client Tier Enterprise Information Tier Middle Tier Enterprise Information Systems (EIS): Relational Database, Legacy Applications, ERP Systems Enterprise JavaBeans™ Enterprise JavaBeans Other Services: JNDI, JMS, JavaMail™ Java EE Applicatio n Server Web Server JSP, Servlets Firewall HTML/XML

8 Web/Application Servers ● Open Source ● Tomcat ● JBoss ● Geronimo ● GlassFish ● Proprietary ● WebSphere ● WebLogic ● OC4J

9 What is a Servlet? A servlet is a Java programming language class used to extend the capabilities of servers that host applications accessed via a request- response programming model.

10 Servlet Processing

11 “Hello World” Java Servlet

12 Servlet Deployment

13 “Hello World” Revisited... Not Very Robust....

14 What is a JSP? JavaServer Page: A JSP page is a text-based document that contains two types of text: static template data, which can be expressed in any text-based format, such as HTML, SVG, WML, and XML;...and... JSP elements, which construct dynamic content.

15 “Hello World” with a JSP

16 You Might Be Wondering... Why does the code do so much grunt work?

17 Java Web Frameworks ● Struts ● Tapestry ● Wicket ● Stripes ● Spring MVC ● Google Web Toolkit ● JavaServer Faces (JSF) ● etc...

18 What is JavaServer Faces? JavaServer Faces technology includes: * A set of APIs for representing UI components and managing their state, handling events and input validation, defining page navigation, and supporting internationalization and accessibility. * A JavaServer Pages (JSP) custom tag library for expressing a JavaServer Faces interface within a JSP page.

19 “Hello World” with JSF

20 “Hello World” with JSF (cont'd)

21 “Hello World” with JSF (cont'd)

22 “Hello World” with JSF (cont'd)

23 JSF Life cycle Source: JSF for nonbelievers, by Rick Hightower

24 Beyond the Java Language Devices Development and more... The Virtual Machine JavaFX Script

25 Beyond the Java Language (cont'd) on

26 Resources ● Java: java.sun.com ● JavaPassion: javapassion.com ● Java EE: java.sun.com/javaee ● Servlets: java.sun.com/products/servlet/articles/tutorial/ ● JSP: java.sun.com/j2ee/tutorial/1_3-fcs/doc/JSPIntro.html ● JSF: ● Ruby, JRuby, Rails: ● NetBeans: netbeans.org