jsf hidden input tag

JSF h:inputHidden tag is used to render a HTML hidden field.

JSF tag:

<h:inputHidden value="Hello World" id="hiddenField" />

Rendered HTML tag:

<input id="jsfForm:hiddenField" 
name="jsfForm:hiddenField" type="hidden" value="Hello World" />

Attributes of h:inputHidden tag.

Attribute Description
id id for the tag
binding Reference to the component used in a backing bean
value value binding
valueChangeListener A method binding that responds to value changes
converter Converter class name
accept Comma-separated list of content types for a form
accept-charset Comma- or space-separated list of character encodings for a form.
border Pixel value for an element’s border width
immediate Process validation early in the life cycle

Example:

test.xhtml

<?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"
	xmlns:f="http://java.sun.com/jsf/core">
	<h:head>
		<title>JSF input hidden example.</title>
	</h:head>
    <h:body>
    	<h2>JSF input hidden example.</h2>
 
    	<h:form>
    	   <h:inputHidden value="#{test.hiddenValue}"/>
    	   <br/> <br/>
    	   <h:commandButton value="Check Hidden Value" 
    	      action="#{test.checkHiddenValue}"/>	
    	</h:form> 
    </h:body>    
</html>

Test.java

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
 
/**
 * Managed bean.
 * @author javawithease
 */
@ManagedBean(name="test")
@SessionScoped
public class Test {
	private String hiddenValue = "JSF Example.";
 
	public String getHiddenValue() {
		return hiddenValue;
	}
 
	public void setHiddenValue(String hiddenValue) {
		this.hiddenValue = hiddenValue;
	}
 
	public String checkHiddenValue() {
		if(hiddenValue == null || 
				hiddenValue.equals("")){
			return "fail";
		}else{
			return "success";
		}
	}
}

faces-config.xml

<?xml version="1.0" encoding="windows-1252"?>
<faces-config version="2.0" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:xi="http://www.w3.org/2001/XInclude" 
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">
 
<navigation-rule>
   <from-view-id>test.xhtml</from-view-id>
   <navigation-case>
      <from-outcome>success</from-outcome>
      <to-view-id>welcome.xhtml</to-view-id>
   </navigation-case>
 
   <navigation-case>
      <from-outcome>fail</from-outcome>
      <to-view-id>test.xhtml</to-view-id>
   </navigation-case>
 
</navigation-rule>
</faces-config>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
    	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-app_3_0.xsd">
 
    <servlet>
        <servlet-name>faces</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    </servlet>
 
	<servlet-mapping>
        <servlet-name>faces</servlet-name>
        <url-pattern>/faces/*</url-pattern>
    </servlet-mapping>
 
</web-app>

welcome.xhtml

<?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"
	xmlns:f="http://java.sun.com/jsf/core">
	<h:head>
		<title>JSF input hidden example.</title>
	</h:head>
    <h:body> 
    	 <h3>Hidden value: <h:outputText 
    	    value="#{test.hiddenValue}"/></h3> 
    </h:body>    
</html>

URL:

http://localhost:7001/JSFExample7/faces/test.xhtml

Output:

JSF example7-1
Click on Check Hidden Value button.
JSF example7-2
Download this example.