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Can somebody recommend any framework to facilitate CRUD development in JSF 2.0?
Aspects I value most:
Any hints highly appreciated! Yours, J.
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JavaServer Faces (JSF) 2.0, is an MVC web framework which focus on simplifies building user interfaces (comes with 100+ ready UI tags) for Java web application and make reusable UI component easy to implement. Unlike JSF 1. x, almost everything is declared in faces-config.
CRUD is indeed a piece of cake using JSF 2.0 provided standard facility: a @ViewScoped bean in combination with a <h:dataTable> basically already suffices. Here's a code example which is shamelessly copied from this article.
Bean:
package com.example; import java.io.Serializable; import java.util.ArrayList; import java.util.List; import javax.annotation.PostConstruct; import javax.faces.bean.ManagedBean; import javax.faces.bean.ViewScoped; @ManagedBean @ViewScoped public class Bean implements Serializable { private List<Item> list; private Item item = new Item(); private boolean edit; @PostConstruct public void init() { // list = dao.list(); // Actually, you should retrieve the list from DAO. This is just for demo. list = new ArrayList<Item>(); list.add(new Item(1L, "item1")); list.add(new Item(2L, "item2")); list.add(new Item(3L, "item3")); } public void add() { // dao.create(item); // Actually, the DAO should already have set the ID from DB. This is just for demo. item.setId(list.isEmpty() ? 1 : list.get(list.size() - 1).getId() + 1); list.add(item); item = new Item(); // Reset placeholder. } public void edit(Item item) { this.item = item; edit = true; } public void save() { // dao.update(item); item = new Item(); // Reset placeholder. edit = false; } public void delete(Item item) { // dao.delete(item); list.remove(item); } public List<Item> getList() { return list; } public Item getItem() { return item; } public boolean isEdit() { return edit; } // Other getters/setters are actually unnecessary. Feel free to add them though. } Page:
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html"> <h:head> <title>Really simple CRUD</title> </h:head> <h:body> <h3>List items</h3> <h:form rendered="#{not empty bean.list}"> <h:dataTable value="#{bean.list}" var="item"> <h:column><f:facet name="header">ID</f:facet>#{item.id}</h:column> <h:column><f:facet name="header">Value</f:facet>#{item.value}</h:column> <h:column><h:commandButton value="edit" action="#{bean.edit(item)}" /></h:column> <h:column><h:commandButton value="delete" action="#{bean.delete(item)}" /></h:column> </h:dataTable> </h:form> <h:panelGroup rendered="#{empty bean.list}"> <p>Table is empty! Please add new items.</p> </h:panelGroup> <h:panelGroup rendered="#{!bean.edit}"> <h3>Add item</h3> <h:form> <p>Value: <h:inputText value="#{bean.item.value}" /></p> <p><h:commandButton value="add" action="#{bean.add}" /></p> </h:form> </h:panelGroup> <h:panelGroup rendered="#{bean.edit}"> <h3>Edit item #{bean.item.id}</h3> <h:form> <p>Value: <h:inputText value="#{bean.item.value}" /></p> <p><h:commandButton value="save" action="#{bean.save}" /></p> </h:form> </h:panelGroup> </h:body> </html> Further, Netbeans has some useful wizards to genreate a CRUD application based on a datamodel.
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JSF 2.0 itself. CRUD is very easy to do with JSF alone - no need for any other framework. You need
@ManagedBean)<h:dataTable> with anedit link/button, by which you set the current row object in the managed bean (using action="#{bean.edit(currentRowObject)}"). (In JSF 1.2 this was achieved by <f:setPropertyActionListener>)void, with no arguments) to handle the operations@PostConstruct to load the data initially.
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