mkyong

jsf2 November 12, 2010 2 min read by mkyong 17 comments

JSF 2 setPropertyActionListener example

In JSF, “f:setPropertyActionListener” tag is allow you to set a value directly into the property of your backing bean. For example, <h:commandButton action="#{user.outcome}" value="Submit"> <f:setPropertyActionListener target="#{user.username}" value="mkyong" /> </h:commandButton> In above JSF code snippets, if the button is clicked, it will set the “mkyong” value to the “username” property via setUsername() method. @ManagedBean(name="user") @SessionScoped public […]

jsf2 November 12, 2010 3 min read by mkyong 5 comments

JSF 2 attribute example

In JSF, “f:attribute” tag allow you to pass a attribute value to a component, or a parameter to a component via action listener. For example, 1. Assign a attribute value to a component. <h:commandButton"> <f:attribute name="value" value="Click Me" /> </h:commandButton> //is equal to <h:commandButton value="Click Me" /> 2. Assign parameter to a component and get […]

jsf2 November 11, 2010 3 min read by mkyong 16 comments

JSF 2 param example

In JSF, “f:param” tag allow you to pass a parameter to a component, but it’s behavior is different depends on which type of component it’s attached. For example, 1. f:param + h:outputFormat If attach a “f:param” tag to “h:outputFormat“, the parameter is specifies the placeholder. <h:outputFormat value="Hello,{0}. You are from {1}."> <f:param value="JSF User" /> […]

jsf2 November 11, 2010 3 min read by mkyong 3 comments

JSF 2 actionListener example

In JSF, “Action Events” are fired by clicking on a button or link component, e.g h:commandButton or h:commandLink. actions vs action listeners Do not confuse these two tags, actions is used to perform business logic and navigation task; While action listeners are used to perform UI interface logic or action invoke observation. Common use case […]

jsf2 November 10, 2010 1 min read by mkyong 5 comments

JSF 2 message and messages example

In JSF, you can output message via following two messages tags : h:message – Output a single message for a specific component. h:messages – Output all messages in current page. See following JSF 2.0 example to show the use of both “h:message” and “h:messages” tags to display the validation error message. JSF page… <?xml version="1.0" […]

jsf2 November 9, 2010 3 min read by mkyong 40 comments

JSF 2 internationalization example

In JSF application, you can change your application locale programmatically like this : //this example change locale to france FacesContext.getCurrentInstance().getViewRoot().setLocale(new Locale(‘fr’); It makes JSF support for internationalization or multiple languages easily. Complete JSF internationalization example In this tutorial, we show you a JSF 2.0 web application, which display a welcome page, retrieve a welcome message […]

jsf2 November 9, 2010 2 min read by mkyong 6 comments

Access a managed bean from event listener – JSF

Problem How can a JSF event listener class access another managed bean? See scenario below : JSF page… <h:selectOneMenu value="#{country.localeCode}" onchange="submit()"> <f:valueChangeListener type="com.mkyong.CountryValueListener" /> <f:selectItems value="#{country.countryInMap}" /> </h:selectOneMenu> country managed bean… package com.mkyong; import java.io.Serializable; import javax.faces.bean.ManagedBean; import javax.faces.bean.SessionScoped; @ManagedBean(name="country") @SessionScoped public class CountryBean implements Serializable{ private String localeCode; public void setLocaleCode(String localeCode) { this.localeCode […]

jsf2 November 9, 2010 4 min read by mkyong 35 comments

JSF 2 valueChangeListener example

When user make changes in input components, such as h:inputText or h:selectOneMenu, the JSF “value change event” will be fired. Two ways to implement it : 1. Method binding – In input component, specified a bean’s method directly in the “valueChangeListener” attribute. JSF… <h:selectOneMenu value="#{bean.value}" onchange="submit()" valueChangeListener="#{bean.valueChangeMethod}"> <f:selectItems value="#{bean.values}" /> </h:selectOneMenu> Java… The method which […]

jsf2 November 8, 2010 4 min read by mkyong 21 comments

Custom validator in JSF 2.0

In this article, we will show you how to create a custom validator in JSF 2.0 Steps Create a validator class by implements javax.faces.validator.Validator interface. Override validate() method. Assign an unique validator ID via @FacesValidator annotation. Reference custom validator class to JSF component via f:validator tag. A detail guide to create a custom validator name […]

jsf2 November 1, 2010 5 min read by mkyong 15 comments

Custom converter in JSF 2.0

In this article, we show you how to create a custom converter in JSF 2.0. Steps 1. Create a converter class by implementing javax.faces.convert.Converter interface. 2. Override both getAsObject() and getAsString() methods. 3. Assign an unique converter ID with @FacesConverter annotation. 4. Link your custom converter class to JSF component via f:converter tag. Custom converter […]

java November 1, 2010 1 min read by mkyong 13 comments

How to validate URL in Java

A short example to show the use of apache.commons.validator.UrlValidator class to validate an URL in Java. import org.apache.commons.validator.UrlValidator; public class ValidateUrlExample{ public static void main(String[] args) { UrlValidator urlValidator = new UrlValidator(); //valid URL if (urlValidator.isValid("https://mkyong.com")) { System.out.println("url is valid"); } else { System.out.println("url is invalid"); } //invalid URL if (urlValidator.isValid("http://invalidURL^$&%$&^")) { System.out.println("url is valid"); […]

java November 1, 2010 1 min read by mkyong 5 comments

java.lang.NoClassDefFoundError: org/apache/oro/text/perl/Perl5Util

Problem Validate an URL with Apache common URLValidator to validate an URL, but it hits following error message ? java.lang.NoClassDefFoundError: org/apache/oro/text/perl/Perl5Util at org.apache.commons.validator.UrlValidator.isValid(UrlValidator.java:242) … Caused by: java.lang.ClassNotFoundException: org.apache.oro.text.perl.Perl5Util at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1516) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1361) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) … 28 more Solution The URLValidator class is required Jakarta-ORO library, make sure you include the oro-xxx.jar into your project class […]

jsf2 October 30, 2010 3 min read by mkyong 18 comments

Customize validation error message in JSF 2.0

The standard JSF conversion and validation error messages are too detail, technical or sometime, not really human readable. In this article, it shows you how to customize standard conversion or validation error message in JSF 2.0. Summary Guide Find your message key from jsf-api-2.x.jar, “Messages.properties” file. Create your own properties file, and put the same […]

jsf2 October 29, 2010 1 min read by mkyong 13 comments

How to skip validation in JSF

Problem See following JSF example : <h:inputSecret id="password" value="#{user.password}" size="20" required="true" label="Password"> <f:validateRegex pattern="((?=.*\d).{6,20})" /> </h:inputSecret> <h:message for="password" style="color:red" /> <h:commandButton value="Cancel" action="cancel" /> <h:commandButton value="Submit" action="result" /> If you click on the “cancel” button, the password validation will be fired and stop you proceed on the cancel page, which is doesn’t make sense. Is […]

jsf2 October 29, 2010 2 min read by mkyong 5 comments

JSF 2 validateRegex example

“f:validateRegex” is a new validator tag in JSF 2.0, which is used to validate JSF component with a given regular expression pattern. For example, <h:inputSecret id="password" value="#{user.password}"> <f:validateRegex pattern="((?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%]).{6,20})" /> </h:inputSecret> The above regex pattern is required 6 to 20 characters string with at least one digit, one upper case letter, one lower case letter […]

jsf2 October 29, 2010 2 min read by mkyong 7 comments

JSF 2 validateRequired example

“f:validateRequired” is a new validator tag in JSF 2.0, which is used to make sure the input field is not empty. For example, <h:inputSecret id="password" value="#{user.password}"> <f:validateRequired /> </h:inputSecret> Alternatively, you can use the “required” attribute also, both are doing the same empty value validation. <h:inputSecret id="password" value="#{user.password}" required="true" /> “f:validateRequired” example A JSF 2.0 […]

jsf2 October 29, 2010 2 min read by mkyong 1 comment

JSF 2 validateDoubleRange example

“f:validateDoubleRange” is a JSF range validator tag, which is used to validate the range of a floating point value. For example, <h:inputText id="salary" value="#{user.salary}"> <f:validateDoubleRange minimum="10.11" maximum="10000.11" /> </h:inputText> When this form is submitted, the validator will make sure the “salary” value is within the range from “10.11” to “10000.11”. “f:validateDoubleRange” example A JSF 2.0 […]

jsf2 October 28, 2010 2 min read by mkyong 3 comments

JSF 2 validateLongRange example

“f:validateLongRange” is a JSF range validator tag, which is used to check the range of a numeric value. For example, <h:inputText id="age" value="#{user.age}"> <f:validateLongRange minimum="1" maximum="150" /> </h:inputText> When this form is submitted, the validator will make sure the “age” value is within the range from 1 to 150. “f:validateLongRange” example A JSF 2.0 example […]

jsf2 October 28, 2010 2 min read by mkyong 3 comments

JSF 2 validateLength example

“f:validateLength” is a JSF string length validator tag, which is used to check the length of a string. For example, <h:inputText id="username" value="#{user.username}"> <f:validateLength minimum="5" maximum="10" /> </h:inputText> When this form is submitted, the validator will make sure the “username” text field contains a minimum length of 5, maximum length of 10. “f:validateLength” example A […]

jsf2 October 28, 2010 3 min read by mkyong 10 comments

JSF 2 panelGrid example

In JSF , “h:panelGrid” tag is used to generate HTML table tags to place JSF components in rows and columns layout, from left to right, top to bottom. For example, you used to group JSF components with HTML table tags like this : HTML <table> <tbody> <tr> <td> Enter a number : </td> <td> <h:inputText […]

jsf2 October 27, 2010 1 min read by mkyong 7 comments

Can’t find bundle for base name xxx, locale en_US

Problem In JSF web application , load a message bundle in application level like this : faces-config.xml <?xml version="1.0" encoding="UTF-8"?> <faces-config xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd" version="2.0"> <application> <message-bundle> com.mkyong.payment_error </message-bundle> </application> </faces-config> When the page is rendered, it hits “Can’t find bundle for base name com.mkyong.payment_error, locale en_US“? Solution Obviously, the bundle or properties file […]

jsf2 October 27, 2010 1 min read by mkyong 2 comments

java.lang.ClassNotFoundException: javax.el.ExpressionFactory

Problem A Java web application deployed in Tomcat, hits the following error message : javax.servlet.ServletException: java.lang.NoClassDefFoundError: javax/el/ExpressionFactory org.apache.jasper.servlet.JspServlet.service(JspServlet.java:268) //… java.lang.ClassNotFoundException: javax.el.ExpressionFactory java.net.URLClassLoader$1.run(URLClassLoader.java:200) java.security.AccessController.doPrivileged(Native Method) java.net.URLClassLoader.findClass(URLClassLoader.java:188) //… javax.servlet.http.HttpServlet.service(HttpServlet.java:717) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.26 logs. Solution The “javax.el.ExpressionFactory” class is belong to the “el-api.jar” library, you can […]

jsf2 October 27, 2010 2 min read by mkyong 12 comments

JSF 2 convertDateTime example

f:convertDateTime” is a standard JSF converter tag, which converts String into a specified “Date” format. In addition, it’s used to implement the date validation as well. The following JSF 2.0 example shows you how to use this “f:convertDateTime” tag. 1. Managed Bean A simple managed bean, with a “date” property. package com.mkyong; import java.io.Serializable; import […]

jsf2 October 26, 2010 3 min read by mkyong 14 comments

JSF 2 convertNumber example

In JSF, “f:convertNumber” is a standard converter, which converts String into a specified “Number” format. In addition, it’s also used as a validator to make sure the input value is a valid number. See following common used examples : Note : Assuming #{receipt.amount} contains a “0.1” value. 1. minFractionDigits attribute <h:outputText value="#{receipt.amount}" > <f:convertNumber minFractionDigits="2" […]

jsf2 October 26, 2010 4 min read by mkyong 3 comments

JSF 2 dataTable sorting example – DataModel

In the previous JSF 2 dataTable sorting example, showed the simplest way, a custom comparator to sort a list and display in dataTable. DataModel Decorator In this example, it shows another way to sort the list in dataTable, which is mentioned in the “Core JavaServer Faces (3rd Edition)“, called DataModel Decorator. 1. DataModel Create a […]

jsf2 October 26, 2010 4 min read by mkyong 7 comments

JSF 2 dataTable sorting example

Here’s the idea to sort a JSF dataTable list : 1. Column Header Put a commandLink in the column header, if this link is clicked, sort the dataTable list. <h:column> <f:facet name="header"> <h:commandLink action="#{order.sortByOrderNo}"> Order No </h:commandLink> </f:facet> #{o.orderNo} </h:column> 2. Implementation In the managed bean, uses Collections.sort() and custom comparator to sort the list. […]

jsf2 October 23, 2010 2 min read by mkyong 16 comments

JSF 2 repeat tag example

The ui:repeat is always uses as an alternative to h:dataTable, to loop over array or list to display the data in HTML table format. See following examples : 1. h:dataTable In dataTable, JSF helps you to generate all the HTML table tags. <h:dataTable value="#{order.orderList}" var="o"> <h:column> #{o.orderNo} </h:column> <h:column> #{o.productName} </h:column> <h:column> #{o.price} </h:column> <h:column> […]

jsf2 October 22, 2010 2 min read by mkyong 4 comments

How to display dataTable row numbers in JSF

JSF dataTable does not contains any method to display the currently selected row numbers. However, you can hack it with javax.faces.model.DataModel class, which has a getRowIndex() method to return the currently selected row number. JSF + DataModel Here’s a JSF 2.0 example to show you how to use DataModel to return the currently selected row […]

jsf2 October 22, 2010 3 min read by mkyong 18 comments

How to delete row in JSF dataTable

This example is enhancing the previous JSF 2 dataTable example, by adding a “delete” function to delete the row in dataTable. Delete Concept The overall concept is quite simple : 1. Assign a “Delete” link to the end of each row. //… <h:dataTable value="#{order.orderList}" var="o"> <h:column> <f:facet name="header">Action</f:facet> <h:commandLink value="Delete" action="#{order.deleteAction(o)}" /> </h:column> 2. If […]

jsf2 October 22, 2010 2 min read by mkyong 35 comments

How to add row in JSF dataTable

This example is enhancing previous delete dataTable row example, by adding a “add” function to add a row in dataTable. Here’s a JSF 2.0 example to show you how to add a row in dataTable. 1. Managed Bean A managed bean named “order”, self-explanatory. package com.mkyong; import java.io.Serializable; import java.math.BigDecimal; import java.util.ArrayList; import java.util.Arrays; import […]

jsf2 October 21, 2010 4 min read by mkyong 42 comments

How to update row in JSF dataTable

This example is enhancing the previous JSF 2 dataTable example, by adding a “update” function to update row in dataTable. Update Concept The overall concept is quite simple : 1. Add a “ediatble” property to keep track the row edit status. //… public class Order{ String orderNo; String productName; BigDecimal price; int qty; boolean editable; […]

jsf2 October 21, 2010 1 min read by mkyong 14 comments

How to pass parameters in method expression – JSF 2.0

Since JSF 2.0, you are allow to pass parameter values in method expression like “#{bean.method(param)}“, but this feature will raising a “EL parsing error” on Tomcat server. For example, Managed Bean @ManagedBean(name="order") @SessionScoped public class OrderBean implements Serializable{ public String editAction(String id) { //… } } JSF page //… <h:commandLink value="Edit" action="#{order.editAction(123)}" /> //… If […]

jsf2 October 20, 2010 3 min read by mkyong 34 comments

JSF 2 dataTable example

In JSF, “h:dataTable” tag is used to display data in a HTML table format. The following JSF 2.0 example show you how to use “h:dataTable” tag to loop over an array of “order” object, and display it in a HTML table format. 1. Project Folder Project folder structure of this example. 2. Managed bean A […]

jsf2 October 19, 2010 2 min read by mkyong 19 comments

How to use comments in JSF 2.0

Problem In JSF 2.0, comment out a JSF tag like this JSF… <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" > <h:body> <!– <h:commandButton type="button" value="#{msg.buttonLabel}" /> –> </h:body> </html> But JSF still process the value expression and output the result to the generated HTML page. Assuming that #{msg.buttonLabel} […]

jsf2 October 18, 2010 2 min read by mkyong 22 comments

Custom tags in JSF 2.0

In JSF 2.0, you are allow to create your custom tag to render a pre-defined content. A custom tag is look like a normal JSF tag, and uses “ui:composition” to insert content into the page. Here’s the summary steps to create a custom tag in JSF 2.0. Uses :ui:compisition” tag to create a predefined content […]

jsf2 October 18, 2010 1 min read by mkyong 3 comments

How to pass parameters to JSF 2.0 template file?

In JSF 2.0 web application, you can use “ui:param” facelets tag to pass parameters to an include file or a template file. 1. Parameter in “ui:include” Example to pass a “tagLine” parameter to an include file. <ui:insert name="header" > <ui:include src="/template/common/commonHeader.xhtml"> <ui:param name="tagLine" value="JSF a day, bug away" /> </ui:include> </ui:insert> In the commonHeader.xhtml file, […]

jsf2 October 18, 2010 5 min read by mkyong 52 comments

JSF 2 Templating with Facelets example

In web application, most pages are follow a similar web interface layout and styling, for example, same header and footer. In JSF 2.0, you can use Facelets tags to provide a standard web interface layout easily, in fact, it’s look similar with Apache Tiles framework. In this example, it shows the use of 4 Facelets […]

jsf2 October 14, 2010 1 min read by mkyong 2 comments

JSF 2 multiple select dropdown box example

In JSF, <h:selectManyMenu /> tag is used to render a multiple select dropdown box – HTML select element with “multiple” and “size=1” attribute. //JSF… <h:selectManyMenu value="#{user.favCoffee1}"> <f:selectItem itemValue="Cream Latte" itemLabel="Coffee3 – Cream Latte" /> <f:selectItem itemValue="Extreme Mocha" itemLabel="Coffee3 – Extreme Mocha" /> <f:selectItem itemValue="Buena Vista" itemLabel="Coffee3 – Buena Vista" /> </h:selectManyMenu> //HTML output… <select name="j_idt6:j_idt8" […]

jsf2 October 14, 2010 4 min read by mkyong 25 comments

JSF 2 dropdown box example

In JSF, <h:selectOneMenu /> tag is used to render a dropdown box – HTML select element with “size=1” attribute. //JSF… <h:selectOneMenu value="#{user.favCoffee1}"> <f:selectItem itemValue="Cream Latte" itemLabel="Coffee3 – Cream Latte" /> <f:selectItem itemValue="Extreme Mocha" itemLabel="Coffee3 – Extreme Mocha" /> <f:selectItem itemValue="Buena Vista" itemLabel="Coffee3 – Buena Vista" /> </h:selectOneMenu> //HTML output… <select name="j_idt6:j_idt8" size="1"> <option value="Cream Latte">Coffee3 […]

jsf2 October 14, 2010 4 min read by mkyong 8 comments

JSF 2 multiple select listbox example

In JSF, <h:selectManyListbox /> tag is used to render a multiple select listbox – HTML select element with “multiple” and “size” attribute. //JSF… <h:selectManyListbox value="#{user.favFood1}"> <f:selectItem itemValue="Fry Checken" itemLabel="Food1 – Fry Checken" /> <f:selectItem itemValue="Tomyam Soup" itemLabel="Food1 – Tomyam Soup" /> <f:selectItem itemValue="Mixed Rice" itemLabel="Food1 – Mixed Rice" /> </h:selectManyListbox> //HTML output… <select name="j_idt6:j_idt8" multiple="multiple" […]

Posts by mkyong