next> <prev

Struts 2 int validation example

The int validator checks that given number is witin the specified range. It can be used in productId, employeeId etc.

Parameters of int validator

There is 3 parameters defined for int validator.

Parameter	Description
fieldName	specifies the field name that is to be validated. It is required in Plain-Validator only.
min	specifies the minimum value. It is ignored bydefault.
max	specifies the maximum value. It is ignored bydefault.

Example of int validator

<validators>
 <!-- Plain Validator Syntax -->
          <validator type="int">
              <param name="fieldName">age</param>
              <param name="min">16</param>
              <param name="max">50</param>
              <message>Age must be between ${min} and ${max}</message>
          </validator>
          
</validators>

<validators>
    <!-- Field Validator Syntax -->
          <field name="age">
              <field-validator type="int">
                  <param name="min">16</param>
                  <param name="max">50</param>
                  <message>Age must be between ${min} and ${max}</message>
              </field-validator>
          </field>

</validators>

Full example of int validator

1) Create index.jsp for input

This jsp page creates a form using struts UI tags. It receives name, password and email id from the user.

index.jsp

<%@ taglib uri="/struts-tags" prefix="s" %>
<html>
<head>
<STYLE type="text/css">
.errorMessage{color:red;}
</STYLE>
</head>
<body>

<s:form action="register">
<s:textfield name="id" label="Product Id"></s:textfield>
<s:textfield name="price" label="Product Price"></s:textfield>
<s:submit value="register"></s:submit>
</s:form>

</body>
</html>

2) Create the action class

This action class inherits the ActionSupport class and overrides the execute method.

RegisterAction.java

package com.javatpoint;

import com.opensymphony.xwork2.ActionSupport;

public class Register extends ActionSupport{
private int id;
private double price;

public int getId() {
	return id;
}

public void setId(int id) {
	this.id = id;
}

public double getPrice() {
	return price;
}

public void setPrice(double price) {
	this.price = price;
}

public String execute(){
	return "success";
}

}

3) Create the validation file

Here, we are using bundled validators to perform the validation.

Register-validation.xml

<?xml version="1.0" encoding="UTF-8"?>

  <!DOCTYPE validators PUBLIC 
  		"-//OpenSymphony Group//XWork Validator 1.0.2//EN" 
  		"http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

  		<validators>
  		
  		 		
  		<field name="id">
  		<field-validator type="int">
  		<param name="min">1</param>
  		<param name="max">999</param>
  		
  		<message>Id must be between ${min} to ${max}</message>
  		</field-validator>
  		</field>
  		
  		
  		</validators>

4) Create struts.xml

This xml file defines an extra result by the name input, and an interceptor jsonValidatorWorkflowStack.

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="default" extends="struts-default">
<action name="register" class="com.javatpoint.Register">
<result name="input">index.jsp</result>
<result>welcome.jsp</result>
</action>

</package>
</struts>    
  
 

5) Create view component

It is the simple jsp file displaying the information of the user.

welcome.jsp

<%@ taglib uri="/struts-tags" prefix="s" %>

Product Id:<s:property value="id"/><br/>
Product price:<s:property value="price"/>

download this example

Next TopicStruts2 Double Validation Example

Struts Tutorial