Java and the Web Kevin Nilson http://www.javaclimber.com Presentation for The Southern Illinois Web Developers Association (SIWebDev) Tuesday October 3rd, 2005 7:00 - 8:15 PM Introduction Who Am I? Kevin Nilson Background Born in Carbondale Raised in Herrin BS in Computer Science, SIUC 2001 Minor in Math, SIUC 2001 Moved to St. Louis for career in 2001 MS in Computer Science, SIUE 2004 Moved to Silicon Valley in July 2005 Certifications Currently Hold Sun Certified Web Component Developer for J2EE Platform (CX-310-080) - Servlet, Jsp, JavaBean, Custom Taglibs, Design Patterns Sun Certified Programmer for the Java 2 Platform 1.4 (CX-310-035) - Core Java Oracle Exam #1Z0-007 Introduction to Oracle9i: SQL SQL Working towards Sun Certified Enterprise Architect for the Java 2 Platform, Enterprise Edition (CX-310-051, CX-310-300A, CX-310-061) Jobs Core Institute Carbondale, IL Grad Assistantship VBA, PL/SQL, MS SQL Server, MS Access US Postal Service St. Louis, MO ASP, VB, C/C++, Oracle, Java SBC St. Louis, MO Java, JSP, Servlet, EJB, Oracle Northrop Grumman O'Fallon, IL Java, JSP, Servlet, Struts, EJB, Oracle Pfizer St. Louis, MO Java, JSP, Servlet, Struts, Spring, Swing, EJB, Oracle How was this presentation made? DocBook What is XML? What is XSLT? What is XSL-FO? What is DocBook? According to the official DocBook web site,
DocBook.org DocBook is a general purpose XML and SGML document type particularly well suited to books and papers about computer hardware and software (though it is by no means limited to these applications).
Overview of Java & J2EE Web Environment Servlets "); out.println("Hello World"); out.println(""); out.println("

Hello World!!!

"); out.println("
"); out.println("Today is "+new java.util.Date()); out.println(""); out.println(""); } public void doPost(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException { doGet(arg0, arg1); } } ]]> JSP Hello World Hello World

Hello World!!!


Today is <%=new java.util.Date()%> ]]> Example of a Bad JSP Bad JSP <%String[][] tableData={{"header-row1, col1", "header-row1, col2", "header-row1, col3"}, {"row2, col1", "row2, col2", "row2, col3"}, {"row3, col1", "row3, col2", "row3, col3"} };%> <%for(int i=0;i <%for(int j=0;j <%=((i==0)?"")%> <%}%> <%}%> ]]> Mixing of markup and java code Hard to update java code Hard to update markup Custom Tags Custom Tag Example
]]> JSTL JSTL Table of Pictures Example
":"")%><%=tableData[i][j]%><%=((i==0)?"":"
 
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Table of Pictures in Portlets Pictures Table
Shortcomings of Java Web & How to Overcome Shortcomings Complex No Clear Directions on How to Architect? Java Pet Store Project Use Framework... which one? Design Patterns J2EE Business Delegate Composite Entity Composite View Data Access Object (DAO) Fast Lane Reader Front Controller Intercepting Filter Model-View-Controller Service Locator Session Facade Transfer Object Value List Handler View Helper GOF (Gang of Four) Abstract Factory Builder Factory Method Prototype Singleton Adapter Bridge Composite Decorator Façade Flyweight Proxy Chain of Resp. Command Interpreter Iterator Mediator Memento Observer State Strategy Template Method Visitor Java Web Frameworks Cocoon Shale Spring Struts Tapestry Turbine WebWork Quick Struts Overview MVC & Model 2 MVC Microsoft Foundation Classes (MFC) Java Swing library Model 2 Servlets (Controller) JSP (View) ActionForms The Model Hold Data submitted in HTML form Can provide Server Side Validation Action The Controller Calls Business Methods Selects and Forwards to View package com.javaclimber.siwebdev.action; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionMessage; import org.apache.struts.action.ActionMessages; public class ShowIndexAction extends Action { public ActionForward execute(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) { try { doSomething(); } catch (SomeException e) { ActionMessages errors=new ActionMessages(); errors.add("myerror",new ActionMessage("myerror.errors")); saveMessages(request,errors); return actionMapping.findForward("fail"); } return actionMapping.findForward("success"); } } struts-config.xml ]]> JSP The View Hold Data submitted in HTML form
Name:
Age:
Department:
Submit ]]> Validator Simple, quick and easy Client-side browser independent JavaScript check Server-side check min18 max65 zip ^\d{5}(-\d{4})?$ mask ${zip} ]]> Tiles
Example of Tiles Tiles
tiles-defs.xml ]]> basiclayout.jsp <%@ include file="/includes/taglibs.jsp"%> Andy Nilson Site - <tiles:getAsString name="title"/>
]]> Struts Shortcomings Complex XML Not POJOs The Future JSF and Shale Is JSF the Future? Will Shale take off like Struts did? Questions Any Questions? Feel Free to contact me anytime at http://www.javaclimber.com