Spring MVC
Introduction
Spring MVC

peter.maas@finalist.com ☄ maas-frensch.com/peter/
Peter Maas ~ Works at Finalist IT
Group. 70% Developer, 20%
Architect and 10% CTO Board.
Techniques used daily include Java/
JEE, Spring, Hiber nate, JSP.
Passionate about scripting language
for the JVM like Groovy and JRuby.
Spring MVC

Introduction to Spring MVC & Web Flow
Spring MVC

Spring
Spring ~ A Layered Java/JEE
application framework. The most
complete lightweight container,
providing centralized, automated
configuration and wiring of your
application objects.
Spring MVC

Why Spring (I)
Key reasons
To provide a non-invasive programming model. As far as
possible, application code should be decoupled from the
framework.
To provide a superior solution to in-house infrastructure,
so that developers can focus on delivering business value
rather than solving generic problems.
To make developing enterprise applications as simple as
possible, but enhancing, rather than sacrificing, power.
Spring MVC

Why Spring (II)
Spring MVC

Spring basics
<bean id=\"myRespository\" class=\"com.finalist.MyRepositoryImpl\"/>
<bean id=\"myService\" class=\"com.finalist.MyServiceImpl\">
<property name=\"maxResults\" value=\"10\"/>
<property name=\"myRespository\" ref=\"myRespository\"/>
</bean>
Equals
myRepository = new MyRepositoryImpl();
myService = new MyServiceImpl();
myService.setMyRepository(myRepository);
myService.setMaxResults(10);
Spring MVC

Spring basics (II)
<bean id=\"myRespository\" class=\"com.finalist.MyRepositoryImpl\"/>
<bean id=\"myService\" class=\"com.finalist.MyServiceImpl\">
<constructor-arg index=\"0\" value=\"10\"/>
<constructor-arg index=\"1\" ref=\"myRespository\"/>
</bean>
Equals
myRepository = new MyRepositoryImpl();
myService = new MyServiceImpl(10, myRepository);
Spring MVC

Demo I
Demo I ~ Basics of Spring
Spring MVC

Typical SpringMVC Architecture
Spring MVC territory
Business logic
User Interface
Web
Domain
Connections to exernal
Model
systems (database,
Services
webservices)
Integration
Spring MVC

MVC
Controller
request
Model
Actor
response
View
Spring MVC

Controller
Controller ~ Controllers interpret
user input and transform such input
into a sensible model which will be
represented to the user by the view.
Spring MVC

Controller Interface
If you find yourself
implementing the
controller interface
you're probable doing
public interface Controller { stuff the hard way!
/**
* Process the request and return a
* ModelAndView object which the DispatcherServlet
* will render.
*/
ModelAndView handleRequest(
HttpServletRequest request,
HttpServletResponse response) throws Exception;
}
Spring MVC

Controllers
«interface»
UrlFilenameViewController
Controller
ParameterizableViewController MultiActionController
AbstractController
BaseCommandController AbstractCommandController
SimpleFormController AbstractFormController AbstractWizardFormController
Spring MVC

Model
Model ~ The domain-specific
representation of the information on
which the application operates.
List<SearchResult> results =
new ArrayList<SearchResult>();
model.addObject(\"searchResults\", results);
List<SearchResult> r =
(List<SearchResult>)model.get(\"searchResults\");
Spring MVC

View
View ~ Renders the model into a
for m suitable for interaction,
typically a user interface element.
Multiple views can exist for a single
model for different purposes.
Spring MVC

Views
view
RedirectView JstlView
AbstractExcelView AbstractView
InternalResourceView TilesView TilesJstlView
AbstractPDFView
AbstractUrlB
asedView
...
AbstractJExcelView AbstractJasperReportsView
...
AbstractExcelView AbstractTemplateView
AbstractXsltView
Spring MVC

Handlers
Handlers ~ map incoming web requests to appropriate handlers.
<bean id=\"handlerMapping\"
class=\"org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping\" />
or
<bean id=\"urlMapping\"
class=\"org.springframework.web.servlet.handler.SimpleUrlHandlerMapping\">
<property name=\"urlMap\">
<map>
<entry key=\"/hello\" value-ref=\"helloworldController\" />
</map>
</property>
</bean>
Spring MVC

Demo II
Demo II ~ Putting it all to work,
making a simple \"Hello World\"
Spring MVC application.
Spring MVC

Demo II ~ Classpath essentials
spring-webmvc.jar
commons-logging.jar
logkit.jar
spring-beans.jar
spring-context.jar
aopalliance.jar
spring-core.jar
spring-support.jar
spring-web.jar
log4j.jar
Spring MVC

More to come ~ Complex forms,
Binding, Validation, Interceptors,
Inter nationalisation, Webflow,
Ajax ...
Spring MVC

internet
Firewall &
Loadbalancer
Multicast / RMI Cache replication
Application servers (web) Backoffice &
cron jobs REST (https) internet
REST (https)
signon.vpro.nl
SOAP (http)
belbios
XML
JDBC
JDBC LDAP
Database cluster Active NFS 3rd party systems
Directory (NEBO/DONNA)
MMBase
scp
Spring MVC