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 example to show the use of “f:validateDoubleRange” tag to validate the range of a “salary” input field, when the validator failed, display the error message via “h:message” tag.

1. Managed Bean

An user managed bean, with a “salary” property.

package com.mkyong;
 
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
 
@ManagedBean(name="user")
@SessionScoped
public class UserBean implements Serializable{
 
	double salary;
 
	public double getSalary() {
		return salary;
	}
 
	public void setSalary(double salary) {
		this.salary = salary;
	}
 
}

2. JSF Page

JSF XHTML page, show the use of “f:validateDoubleRange” tag to make sure the “salary” input value is within the range from “10.11″ to “10000.11″.

<?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:body>
 
    	<h1>JSF 2 validateDoubleRange example</h1>
 
	<h:form>
 
		<h:panelGrid columns="3">
 
			Enter your salary : 
 
			<h:inputText id="salary" value="#{user.salary}" 
				size="10" required="true"
				label="Salary" >
 
				<f:validateDoubleRange minimum="10.11" maximum="10000.11" />
 
			</h:inputText>
 
			<h:message for="salary" style="color:red" />
 
		</h:panelGrid>
 
		<h:commandButton value="Submit" action="result" />
 
	</h:form>
 
    </h:body>
</html>