java ee - fhws 2014 - 3 jsf
DESCRIPTION
Java EE - FHWS 2014 - 3 JSFTRANSCRIPT
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Java EEFull Stack for Business
Applications
Java Server Faces
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Referent: MATTHIAS REINING
Technical Manager Insurance at RGI Deutschland GmbH
blog: http://blog.matthias-reining.com
twitter: https://twitter.com/MatthiasReining
about.me: http://about.me/matthiasreining
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JAVA SERVER FACES
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DAS PROGRAMM
Die Spec Idee, Historie
Der App Server Containerkonzept Paketierung (JAR, WAR, EAR) Marktüberblick
Das Projekt Entwicklung eines Beispielprojektes IDE Settings, Oberflächen (Servlets, JSF),
Business Logic (EJB), Persistence (JPA), Java EE Patterns (CDI), Web Services (JAX-RS)
Die Produktion Buildmanagement (maven, Jenkins) Deployment einer Java EE Anwendung in
der Cloud bei einem PaaS Anbieter
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BESTANDSAUFNAHME
Welche Java UI Frameworks sind bekannt? Struts?
Wicket?
Vaadin?
GWT?
Spring Web MVC?
JSF?
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Wieso werden neben Servlets & JSPs noch andere Frameworks
genutzt?Komfortables Handling von Templates HTML Formulare Komponenten Wartung …
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JAVA SERVER FACES
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What is JSF?
JavaServer Faces (JSF) is a UI component based Java Web application framework. JSF is serverbased, e.g. the JSF UI components and their state are represented on the server with a defined life cycle of the UI components. JSF is part of the Java EE standard.
[Quelle: http://docs.oracle.com/javaee/7/firstcup/doc/java-ee001.htm#GKHOY]
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Java Server Faces
Tutorials / Nachschlagewerke
http://docs.oracle.com/javaee/7/tutorial/doc/jsf-intro.htm http://jsfatwork.irian.at/
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JSF - SpecReference Implementation: MojarraAlternative: MyFaces
Konkrete Implementierung hängt vom Application Server ab!
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MODEL – VIEW – CONTROLLER
Designpattern
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Java Server Faces
MODEL Java POJO
VIEW Faclet
CONTROLLER Managed Bean (Backing Bean)
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POJOModel
Plain Old Java Object
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FACLETSView
XHTML Files mit speziellen Tags <h:…>
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MANAGED BEAN
ControllerSynonym „Backing Bean“
@ManagedBean verutlich deprecated ab Java EE 8(http://
stackoverflow.com/questions/4347374/backing-beans-managedbean-or-cdi-beans-named
)
@Named (siehe später CDI)
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JSF Scopes
@RequestScope (javax.faces.bean.RequestScoped) @SessionScope (javax.faces.bean.SessionScoped) @ApplicationScope (javax.faces.bean.ApplicationScoped)
@ViewScope (javax.faces.bean.ViewScoped) @CustomScope (javax.faces.bean.CustomScoped) @NoneScope (javax.faces.bean.NoneScoped)
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UI KOMPONENTEN IN EINEM FACELETJSF-HTML-UI-Komponenten xmlns:h="http://xmlns.jcp.org/jsf/html
Tags zur grafischen Darstellung der Benutzeroberfläche
JSF-Core-UI-Komponentenxmlns:f="http://xmlns.jcp.org/jsf/core"
Tags, die unabhängig von der Darstellung sind. Beispielsweise gehören hierzu die Konvertierung und die Validierung der Geschäftsdaten oder auch die ActionListener.
JSF-Templating
xmlns:ui="http://xmlns.jcp.org/jsf/facelets"Tags für das Templating
[Quelle: Professionell entwickeln mit Java EE 7 – Das umfassende Handbuch, Seite 753]
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TEMPLATING MIT FACELETS
<ui:insert>„Platzhalter“ in einem Template
<ui:composition>Verbindung zum Template
<ui:define>„Implementierung“ eines Platzhalters
<ui:include>Wiederverwendung von „Snippets“
http://www.mkyong.com/jsf2/jsf-2-templating-with-facelets-example/http://www.oracle.com/technetwork/articles/java/facelets-454361.html
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JSF LIFECYCLE
1. RESTORE_VIEW2. APPLY_REQUEST_VALUES3. PROCESS_VALIDATIONS4. UPDATE_MODEL_VALUES5. INVOKE_APPLICATION6. RENDER_RESPONSE
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JSF Messages
FacesMessage m = new FacesMessage("läuft..");
FacesContext.getCurrentInstance().addMessage("testMessage", m);
<h:message for="testMessage„/>
Globale MessageFacesContext.getCurrentInstance().addMessage(null, m);
<h:messages/>
<h:messages globalOnly=„true“/>
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i18nInternationalization
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Validierung<f:validate…
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JSF Events & Listener
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JSF Komponenten Bibliotheken
Wichtig für GeschäftsanwendungenAllerdings nicht teil der Java EE Spezifikation
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JSF Komponenten Bibliotheken
Primefaces
Rich Faces
Ice Faces
My Faces
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Aber…Wieso gibt es dann neben JSF noch andere Webframeworks?
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Was macht die Konkurrenz?
https://vaadin.com/demo
http://samples.gwtproject.org/samples/Showcase/Showcase.html
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Stirbt JSF?
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