Struts 2.x Redirect Action ~ Java Tutorials by Experts

Thursday, May 23, 2013

Struts 2.x Redirect Action

naresh Struts 2.x Redirect Action No comments

The redirect result type calls the standard response.sendRedirect() method, causing the browser to create a new request to the given location.
We can provide the location either in the body of the <result...> element or as a <param name="location"> element. Redirect also supports the parse parameter. Here's an example configured using XML:

<action name="hello" 
   class="com.tutorialspoint.struts2.HelloWorldAction"
   method="execute">
   <result name="success" type="redirect">
       <param name="location">
         /NewWorld.jsp
      </param >
   </result>
</action>

So just modify your WebContent/WEB-INF/classes/struts.xml file to define redirect type as mentioned above:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
   <constant name="struts.devMode" value="true" />
   <package name="helloworld" extends="struts-default">

      <action name="hello" 
         class="com.tutorialspoint.struts2.HelloWorldAction"
         method="execute">
         <result name="success" type="redirect">
            <param name="location">
             /NewWorld.jsp
            </param >
        </result>
      </action>

      <action name="index"> 
         <result >/index.jsp</result>
      </action>

   </package>
</struts>

Here NewWorld.jsp is a new page where you will be redirected whenever your action retruns "success". Let us keep WebContent/WEB-INF/lib/web.xml without any change, so its content will be as follows:

<?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_3_0.xsd"
   id="WebApp_ID" version="3.0">

   <display-name>Struts 2</display-name>

   <welcome-file-list>
      <welcome-file>index.jsp</welcome-file>
   </welcome-file-list>
   
   <filter>
      <filter-name>struts2</filter-name>
      <filter-class>
         org.apache.struts2.dispatcher.FilterDispatcher
      </filter-class>
   </filter>

   <filter-mapping>
      <filter-name>struts2</filter-name>
      <url-pattern>/*</url-pattern>
   </filter-mapping>

</web-app>

Create action class file Java Resources/src/HelloWorldAction.java as follows:

package com.tecra.struts2;

import com.opensymphony.xwork2.ActionSupport;

public class HelloWorldAction extends ActionSupport{
   private String name;

   public String execute() throws Exception {
      return "success";
   }
   
   public String getName() {
      return name;
   }

   public void setName(String name) {
      this.name = name;
   }
}

Let create main page WebContent/WEB-INF/index.jsp with the following content:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
   pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
   <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
   "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Hello World</title>
</head>
<body>
   <h1>Hello World From Struts2</h1>
   <form action="hello">
      <label for="name">Please enter your name</label><br/>
      <input type="text" name="name"/>
      <input type="submit" value="Say Hello"/>
   </form>
</body>
</html>

Let us create WebContent/WEB-INF/NewWorld.jsp where request will be redirected in case action returns "success" :

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
   pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
   <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
   "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Redirected Page</title>
</head>
<body>
   <h1>New Page after redirection</h1>
</body>
</html>

Now Right click on the project name and click Export > WAR File to create a War file. Then deploy this WAR in the Tomcat's webapps directory. Finally, start Tomcat server and try to access URL http://localhost:8080/HelloWorldStruts2/index.action. This will give you following screen:
Page Redirection Example

Enter any value in the text box and submit the page. You should see the next page after redirection:
Redirected Page

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Thursday, May 23, 2013