The h:dataTable is one of the most important component that’s coming from the starting of JSF page. JSF 2 support the using of h:dataTable by means of iterating a list of data that’s filled inside a bean’s list to create an HTML table. The most important attribute at the h:dataTable is the value attribute that represents the data over which h:dataTable iterates; the data must be one of the following types:
- A Java Object (it’s not matter, cause the h:dataTable will iterate once if that object is scalar – not collection- making the object available in the body of the tag.
- An Array.
- An instance of java.util.List
- An instance of java.sql.ResultSet
- An instance of javax.servlet.jsp.jstl.sql.Result
- An instance of javax.faces.model.DataModel.
At this post we would be introducing a simple h:dataTable that’s connected with an instance of Array. As h:dataTable iterates, it makes each item in the array, list, resultSet, etc., available within the body of the tag. The name of the item is specified with an h:dataTable’s var attribute.
Also Read:
The h:dataTable component can contain only h:column and it will discard all other component, but the h:column is capable of rendering an unlimited number of the components. The h:dataTable component provides the developer capability of adding a header and footer for the dataTable that’s being created.
1. Managed Bean
SimpleDataTableBean
package net.javabeat.jsf;
import java.util.ArrayList;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
@ManagedBean
@SessionScoped
public class SimpleDataTableBean {
private List<Tutorial> tutorials = new ArrayList<Tutorial>();
public SimpleDataTableBean() {
this.tutorials.add(new Tutorial(1, "JSF 2"));
this.tutorials.add(new Tutorial(2, "EclipseLink"));
this.tutorials.add(new Tutorial(3, "HTML 5"));
this.tutorials.add(new Tutorial(4, "Spring"));
}
public String register() {
return "registrationInfo";
}
public List<Tutorial> getTutorials() {
return tutorials;
}
public void setTutorials(List<Tutorial> tutorials) {
this.tutorials = tutorials;
}
}
2. Tutorial Class
Tutorial.java
package net.javabeat.jsf;
public class Tutorial {
private int tutorialId;
private String tutorialDescription;
public Tutorial(int id, String desc){
this.tutorialId = id;
this.tutorialDescription = desc;
}
public int getTutorialId() {
return tutorialId;
}
public void setTutorialId(int tutorialId) {
this.tutorialId = tutorialId;
}
public String getTutorialDescription() {
return tutorialDescription;
}
public void setTutorialDescription(String tutorialDescription) {
this.tutorialDescription = tutorialDescription;
}
}
3. The Views
simpleDataTable.xhtml
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<h:form>
<h1>
<h:outputText value="JavaBeat JSF 2.2 Examples" />
</h1>
<h2>
<h:outputText value="dataTable Example" />
</h2>
<h:outputText value="JavaBeat Site Provides the Following Tutorials:"/>
<br/>
<h:dataTable value="#{simpleDataTableBean.tutorials}" var="tutorial" border="1">
<h:column>
<f:facet name="header">
<h:outputText value="Tutorial ID"/>
</f:facet>
<h:outputText value="#{tutorial.tutorialId}"/>
<f:facet name="footer">
<h:outputText value="Tutorial ID"/>
</f:facet>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Tutorial Description"/>
</f:facet>
<h:outputText value="#{tutorial.tutorialDescription}"/>
<f:facet name="footer">
<h:outputText value="Tutorial Description"/>
</f:facet>
</h:column>
</h:dataTable>
</h:form>
</html>
4. The Deployment Descriptor
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5" metadata-complete="true"> <context-param> <description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description> <param-name>javax.faces.STATE_SAVING_METHOD</param-name> <param-value>client</param-value> </context-param> <context-param> <param-name>javax.faces.application.CONFIG_FILES</param-name> <param-value>/WEB-INF/faces-config.xml</param-value> </context-param> <servlet> <servlet-name>Faces Servlet</servlet-name> <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>/faces/*</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>*.xhtml</url-pattern> </servlet-mapping> <listener> <listener-class>com.sun.faces.config.ConfigureListener</listener-class> </listener> </web-app>
5. JSF 2 DataTable Demo
The below snapshot shows you the complete example of using an h:dataTable with its header and footer caption. The snapshot should demonstrate the concept of associate an h:dataTable component with a simple list of Tutorial object and using the concept of var reference for accessing the records inside the body of the h:dataTable.
[wpdm_file id=10]
JSF 2 SelectOneRadio Example