Ans)
Spring MVC frame work is another popular MVC
framework for Web Apps like Struts.
Below is the
sample Spring MVC configuration for the Log In
Functionality.
Step 1 :
public class
StartController extends
SimpleFormController {
@Override
protected ModelAndView
onSubmit(HttpServletRequest httpServletRequest,
HttpServletResponse
httpServletResponse,
Object o, BindException e) throws Exception {
StartForm form = (StartForm)
o;
if
(form.getCommand().equals("startForm")) {
return new ModelAndView(new
RedirectView("newOrder/newOrder.htm"));
}
}
@Override
protected Object
formBackingObject(HttpServletRequest httpServletRequest) throws
Exception {
AddDocumentForm form = new AddDocumentForm();
return form;
}
@Override
protected Map referenceData(HttpServletRequest request, Object o,
Errors errors) throws Exception {
Map<String, Object>
map = super.referenceData(request, o, errors);
return map;
}
}
View :
<bean name="/start.htm"
class="com.salesorder.StartController">
<property name="sessionForm"
value="true"/>
<property name="commandName"
value="startForm"/>
<property name="commandClass"
value="com.salesorder.StartForm"/>
<property name="formView"
value="salesorder/start"/>
<property name="successView"
value="start.htm"/>
</bean>
Resolver :
Views in Spring
are addressed by a view name and are resolved by a view
resolver,
Spring Offers Several View Resolvers such as
"AbstractCachingViewResolver",
"XmlViewResolver","ResourceBundleViewResolver","InternalResourceViewResolver",
"VelocityViewResolver".
Each
of the above solves different technical solution and offers
different
functionality.
"InternalResourceViewResolver" is
most commonly used one , could be used as follows.
<bean id="viewResolver"
class="
org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix"
value="/WEB-INF/jsp/"/>
<property name="suffix"
value=".jsp"/>
</bean>
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