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Struts 2 Validation Example

Struts 2 Validation Example

Struts 2 Validation Example explains about step by step example of Struts2 Validation With Eclipse

Apache Struts 2, is a popular Java Model-View-Contraller (MVC) framework, which is developed by merging WebWork and Struts 1.x web frameworks.

Struts 2 have lot off difference with struts 1, struts 2 have implemented with an idea of convention over configuration, it also have many annotations in order to increase the developer productivity.

Struts 2 provides in built validation features. You can see how to validate the fields in struts 2, on below example

Note

When you deploy your struts 2 web application, you may get FilterDispatcher is deprecated! Please use the new filters! warning message, this is because FilterDispatcher filter is deprecated since Struts version 2.1.3, you need to re-configure your application with StrutsPrepareAndExecuteFilter

Required Libraries
  1. JDK 6
  2. Eclipse 3.7
  3. struts-2.3.15.1

Following jar must be in classpath

  1. commons-fileupload-1.3.jar
  2. commons-io-2.0.1.jar
  3. commons-lang3-3.1.jar
  4. commons-logging-1.1.3.jar
  5. freemarker-2.3.19.jar
  6. javassist-3.11.0.GA.jar
  7. ognl-3.0.6.jar
  8. struts2-core-2.3.15.1.jar
  9. xwork-core-2.3.15.1.jar

You can see the project structure below

Struts 2 Validation Example

Register.jsp

<%@taglib uri="/struts-tags" prefix="s"%>
<html>
<head>
<s:head />
</head>
<body>
	<s:form action="register" method="post">
		<s:textfield name="username" label="User Name" />
		<s:textfield name="age" label="Age" />
		<s:password name="password" label="Password" />
		<s:submit value="register" />
	</s:form>
</body>
</html>

RegisterSuccess.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s" %>
<html>
    <body>
        <h1>Register Success</h1>
    </body>
</html>

RegisterAction.java

Here is the action class, We are using Struts in built custom validate() method and throwing addFieldError()

package net.javatips;

import com.opensymphony.xwork2.ActionSupport;

public class RegisterAction extends ActionSupport {

  
private static final long serialVersionUID = 1L;
  
private String username;
  
private Integer age;
  
private String password;

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

  
public String getUsername() {
     
return username;
  
}

  
public void setUsername(String username) {
     
this.username = username;
  
}

  
public Integer getAge() {
     
return age;
  
}

  
public void setAge(Integer age) {
     
this.age = age;
  
}

  
public String getPassword() {
     
return password;
  
}

  
public void setPassword(String password) {
     
this.password = password;
  
}

  
public void validate() {
     
if (getUsername().length() == 0) {
        
addFieldError("username", "User Name is required");
     
} else if (!getUsername().equals("Rockey")) {
        
addFieldError("username", "Invalid User");
     
}
     
if (getPassword().length() == 0) {
        
addFieldError("password", "Invalid password");
     
}
     
if (getAge() == null) {
        
addFieldError("age", "Age required");
     
}
   }
}

struts.xml

Following is the struts 2 configuration, which will used for naviagating different page views

The name of this configuration file should be "struts.xml"

<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
	<package name="default" extends="struts-default">
		<action name="register" class="net.javatips.RegisterAction">
			<result name="success">RegisterSuccess.jsp</result>
			<result name="input">Register.jsp</result>
		</action>
	</package>
</struts>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	version="2.5">
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	<session-config>
		<session-timeout>30</session-timeout>
	</session-config>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>
Run

You need to invoke http://localhost:8080/Struts2Validation/Register.jsp

Struts 2 Validation Example

Struts 2 Validation Example

Struts 2 Validation Example

Struts 2 Validation Example





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1 Comments on "Struts 2 Validation Example"
13.05.2014 15:57:57 hariharan
Its very useful for me.................