Controller annotati. con Spring MVC 2.5

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Marion Pearson
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1 Controller annotati con Spring MVC 2.5

2 Spring MVC

3 The Old Style

4 The RequestMapping( {"/my/*.html") public class MyController public void index() { // do something useful

5 Configuration No, thanks! (at least while I m writing the code)

6 WEB-INF/web.xml < web-app> < display-name> JavaDay 2009 Demo Web Application < /display-name>  < listener> < listener-class>org.springframework.web.context.contextloaderlistener < /listener-class> < /listener> < servlet> < servlet-name>javaday < /servlet-name> < servlet-class>org.springframework.web.servlet.dispatcherservlet < /servlet-class> < load-on-startup >1< /load-on-startup> < /servlet> < servlet-mapping> < servlet-name> javaday < /servlet-name> < url-pattern >*.html < /url-pattern> < /servlet-mapping> < welcome-file-list> < welcome-file> redirect.jsp < /welcome-file> < /welcome-file-list> < /web-app>

springframework.web.context.contextloaderlistener < /listener-class> < /listener> < servlet>

7 WEB-INF/javaday-servlet.xml <?xml version=" 1. 0 " encoding="utf-8"? > <beans xmlns=" xmlns:xsi=" 001/XMLSchema-instance" xmlns:context=" xmlns:p=" xsi:schemalocation=" < context:component-scan base-package=" it.jugpadova.javaday.controller"/>  <bean id="viewresolver" class="org.springframework.web.servlet.view.internalresourceviewresolver" p:prefix="/web-inf/jsp/" p:suffix=".jsp" /> < /beans>

springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.

8 Parancoe meta-framework Spring MVC + Hibernate/JPA + easy DAO +...plugins

9 Using RequestMapping("/contact/ *.html") public class ContactController private ContactDao public void list(model model) { List< Contact > contacts = contactdao.findall(); model.addattribute("contacts", contacts);

contactdao; @RequestMapping public void list(model model) { List<

10 WEB-INF/jsp/contact/list.jsp < table> < c:foreach var="contact" items=" ${ contacts"> < tr> < td>${ contact.name </td> < td>${ contact. </td> < td> < a href="edit.html?id= ${ contact.id " > Edit < /a> < a href="delete.html?id= ${ contact.id " > Delete < /a> < /td> < /tr> < /c:foreach> < /table> < c:if test=" ${ empty contacts" > No contacts in the DB < /c:if> < a href="edit.html" > New < /a>

name </td> < td>${ contact.email </td> < td> < a href="edit.html?id= ${ contact.

11 More in the countries ) public List< Country > getcountries() { // producing and returning the list

12 Getting public String RequestParam("id") Long id) { Contact contact = contactdao.get(id); if (contact == null) { throw new RuntimeException("Contact not found"); contactdao.delete(contact); return "redirect:list.html";

13 Preparing for a public void RequestParam(value = "id", Model model) { required = false) Long id, Contact contact = null; if (id!= null) { contact = contactdao.get(id); if (contact == null) { throw new RuntimeException("Contact not found"); else { contact = new Contact(); model.addattribute("contact", contact);

14 WEB-INF/jsp/contact/edit.jsp < form:form commandname=" contact" method="post" action=" ${ cp /contact/save.html" > < table> < tr> < td> Name: < /td> < td> < form:input path="name"/ > < /td> < /tr> < tr> < td> < /td> < td> < form:input path=" "/ > < /td> < /tr> < tr> < td > < /td> < td>< input type="submit" value="submit"/ >< /td> < /tr> < /table> < form:errors path=" *" cssclass="errorbox"/ > < /form:form>

html" > < table> < tr> < td> Name: < /td> < td> < form:input path="name"/ > < /td> < /tr> < tr> < td>

15 Submit RequestMapping( SessionAttributes( {"contact") public class ContactController { public String Contact contact, SessionStatus status) { contactdao.store(contact); status.setcomplete(); return "redirect:list.html";

.. @RequestMapping public String save( @ModelAttribute("contact") Contact

16 private Validator public String ModelAttribute("contact") Contact contact, BindingResult result, SessionStatus status) { validator.validate(contact, result); if (result.haserrors()) { return "contact/edit"; contactdao.store(contact); status.setcomplete(); return "redirect:list.html";

SessionStatus status) { validator.validate(contact, result); if (result.

17 continueonerrors=false) public String ModelAttribute("contact") Contact contact, BindingResult result, SessionStatus status) { contactdao.store(contact); status.setcomplete(); return "redirect:list.html";

18 File upload <form:form commandname="contact" method="post" action=" ${ cp /contact/save.html" enctype="multipart/form-data"> < table> <! > < tr> < td> Picture: < /td> < td> < input type="file" name="picture" id="picture"/ > < /td> < /tr> <! > < /form:form>

--... --> < tr> < td> Picture: < /td> < td> < input type="file"

19 Changing the protected void initbinder(webdatabinder binder) { binder.registercustomeditor(byte [].class, new ByteArrayMultipartFileEditor());

20 Binary public void RequestParam("id") Long id, throws IOException { OutputStream os) Contact contact = contactdao.get(id); os.write(contact.getpicture()); os.flush(); os.close(); < img src= ${ cp /contact/picture.html >

21 Questions??

Controlling Web Application Behavior

2006 Marty Hall Controlling Web Application Behavior The Deployment Descriptor: web.xml JSP, Servlet, Struts, JSF, AJAX, & Java 5 Training: http://courses.coreservlets.com J2EE Books from Sun Press: http://www.coreservlets.com