Successful Business with Agile

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Java Web Development
T-111.4360 WWW-palvelun suunnittelu _at_ HUT
4.3.2008
Markus HjortReaktor Innovations
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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!

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The Big Picture
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Standards

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

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Open Source Frameworks

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

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Servlet Containers (Application Servers)?

• Tomcat
• Jetty
• Bea WebLogic
• IBM WebSphere
• Caucho Resin
• ...

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Typical applications

• Static web sites
• Dynamic web sites
• Web-based Products

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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
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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

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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

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Lessons Learned In Java Web Development
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Epic fails

• The shortcomings of Servlet-only solutions
• JSP Model 1 Architecture

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OO is important!
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Reuse
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Testability
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Model View Controller(MVC)?
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Front Controller Pattern

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

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ComponentFrameworks
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Html Components

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

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Thank you!
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Links

• JSP Tutorial http//www.jsptut.com/
• Wicket http//apache.wicket.org/
• MVC http//en.wikipedia.org/wiki/Model-view-contr
  oller
• JDBC (for database access) http//java.sun.com/do
  cs/books/tutorial/jdbc/overview/index.html