Markus HjortReaktor Innovations

Java WebDevelopment

T-111.4360 WWW-palvelun suunnittelu @ HUT 4.3.2008

Goals Tonight

I hope you all get Short introduction to Java Web Development Understanding how Java tries to solve real world

problems within web development!

The Big Picture

Standards

Java Applets Java Servlets Java Server Pages (JSP) Java Server Faces (JSF) Java Portlets

Open Source Frameworks

Struts WebWork GWT (Google Web Toolkit) Tapestry Wicket ...

Servlet Containers (Application Servers)

Tomcat Jetty Bea WebLogic IBM WebSphere Caucho Resin ...

Typical applications

Static web sites Dynamic web sites Web-based Products

The Challenges of Web Development*

Web interfaces change frequently Web interfaces involve complex markup Web interfaces use a very different

model compared to traditional Uis in languages such as Java

* Rod Johnson: J2EE Design and development

The Challenges of Web Development

HTTP requests can carry only string parameters

Web interfaces make it difficult to validate user input, as we have limited control over over the client browser

HTML offers a limited choice of UI controls

The Challenges of Web Development

Ensuring that a web site looks right and works correctly in all all common browsers can be difficult

There are many efficiency considerations

Web interfaces are relatively hard to test

Lessons Learned In Java Web

Development

Epic fails

The shortcomings of Servlet-only solutions “JSP Model 1” Architecture

OO is important!

Reuse

Testability

Model View Controller(MVC)

Front Controller Pattern

Controller uses model for business logic Controller forwards to view View shows model values

ComponentFrameworks

Html Components

Links Labels Images ... You can easily create your own custom

components

Thank you!

Links

JSP Tutorial: http://www.jsptut.com/

Wicket: http://apache.wicket.org/

MVC: http://en.wikipedia.org/wiki/Model-view-controller

JDBC (for database access): http://java.sun.com/docs/books/tutorial/jdbc/overview/index.html