<f:validateLongRange>Tag Example
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Tag description: JSF <f:validateLongRange;> tag registers a LongRangeValidator instance on the UIcomponent associated with the enclosing tag. LongRangeValidator is a Validator that checks the value of the corresponding component against specified minimum and maximum values.
Code
<f:validateLongRange>
Example :
Step 1: Welcome page of Example
%--
Name= welcomeJSF.jsp
--%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%--
This file is an entry point for JavaServer Faces application.
--%>
<f:view>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>r4r.co.in</title>
</head>
<body>
<h1><h:outputText value="Tag <f:validateLongRange> Example"/></h1>
<h:form id="validateLongRange">
<%-- Display Error message --%>
<h:message for="validateLongRange:num1" style="color:red" /><BR/>
<h:message for="validateLongRange:num2" style="color:red" />
<h:panelGrid columns="2" cellpadding="2" cellspacing="2" >
<h:outputLabel value="Choose First Number" />
<h:inputText id="num1" value="#{validateLongRange.num1}" required="true" >
<%-- Tag <f:validateLongRange> use here --%>
<f:validateLongRange minimum="01" maximum="200"/>
</h:inputText>
<h:outputLabel value="Choose Second Number" />
<h:inputText id="num2" value="#{validateLongRange.num2}" required="true" >
<f:validateLongRange minimum="01" maximum="200"/>
</h:inputText>
<h:commandButton action="#{validateLongRange.submit()}" value="Submit" />
<h:commandButton action="#{validateLongRange.reset()}" value="reset" />
</h:panelGrid>
<BR><BR>
<%-- Display result --%>
<h:panelGrid columns="2" rendered="#{validateLongRange.flag != false}">
<h:outputLabel value="Sum of two Number = " />
<h:outputText value="#{validateLongRange.sumOfNum}" />
<h:outputLabel value="Product of two Number = " />
<h:outputText value="#{validateLongRange.productOfNum}" />
</h:panelGrid>
</h:form>
</body>
</html>
</f:view>
Step 2: ManagedBean class for provide logic in program
*
* Save as a validateLongRangeBean.java
*/
package r4r.JSF2;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
/* -- Name of Bean -- */
@ManagedBean(name = "validateLongRange")
@RequestScoped
public class validateLongRangeBean {
private long num1, num2;
//Create a flag with initial value false
private boolean flag = false;
private double sumOfNum, productOfNum;
/* -- Getter/ Setter -- */
public boolean isFlag() {
return flag;
}
public void setFlag(boolean flag) {
this.flag = flag;
}
public long getNum1() {
return num1;
}
public void setNum1(long num1) {
this.num1 = num1;
}
public long getNum2() {
return num2;
}
public void setNum2(long num2) {
this.num2 = num2;
}
public double getProductOfNum() {
return productOfNum;
}
public void setProductOfNum(double productOfNum) {
this.productOfNum = productOfNum;
}
public double getSumOfNum() {
return sumOfNum;
}
public void setSumOfNum(double sumOfNum) {
this.sumOfNum = sumOfNum;
}
/* -- submit method -- */
public String submit() {
flag = true;
sumOfNum = (double) (num1 + num2);
productOfNum = (double) (num1 * num2);
return "submit";
}
/* -- reset method -- */
public String reset() {
flag = false;
num1 = (long) 00.00;
num2 = (long) 00.00;
return "reset";
}
}
Output :
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