Spring MVC Yet Another Web Framework

MVC for Java Web Applications Model = Java POJO View = JSP Pages Controller = Java Servlet

Model = Java POJO

View = JSP Pages

Controller = Java Servlet

Spring's MVC Approach Model = Java Map View = Pluggable view technology (JSP, tiles, velocity, etc) Controller = Spring controller classes

Model = Java Map

View = Pluggable view technology (JSP, tiles, velocity, etc)

Controller = Spring controller classes

The HTTP Request

Spring MVC Overview All calls go through DispatcherServlet Spring beans configured in context XML file

All calls go through DispatcherServlet

Spring beans configured in context XML file

Handling Forms Controllers - displays the form or processes the form submit (by detecting GET/POST) Command - Java class that represents the form data Validators - validates a class, usually your Command class Logical breakdown of form processing: formBackingObject() onBindNewForm() onBind() onBindAndValidate() onSubmit()

Controllers - displays the form or processes the form submit (by detecting GET/POST)

Command - Java class that represents the form data

Validators - validates a class, usually your Command class

Logical breakdown of form processing:

formBackingObject()

onBindNewForm()

onBind()

onBindAndValidate()

onSubmit()

Bonus features Interceptors - do something before handing off to controller HandlerExceptionResolvers - handle exceptions thrown from controllers AbstractWizardFormController - support simple workflow pages (session-backed forms - think shopping cart check out)

Interceptors - do something before handing off to controller

HandlerExceptionResolvers - handle exceptions thrown from controllers

AbstractWizardFormController - support simple workflow pages (session-backed forms - think shopping cart check out)

Demo

References http://static.springframework.org/spring/docs/2.5.x/api/ http://static.springframework.org/spring/docs/2.5.x/reference/spring-web.html

http://static.springframework.org/spring/docs/2.5.x/api/

http://static.springframework.org/spring/docs/2.5.x/reference/spring-web.html