<div dir="ltr" style="text-align: justify;" trbidi="on">
<div dir="ltr" style="text-align: justify;" trbidi="on">In this tutorial, We will discuss about the param tag in struts 2.<br />
This tag can be used to parameterize other tags. The parameters can be added with or without a name as key. when we declare the param tag, the value can be defined in either a value attribute or as text between the start and end tag. Struts behaves a bit different according to these two situations.</p>
<p> This tag has the following two parameters.</p>
<ul style="text-align: left;">
<li><b>name </b>(String) &#8211; the name of the parameter</li>
<li><b>value </b>(Object) &#8211; the value of the parameter</li>
</ul>
<p>
 The following Example will shows how to implement the <b>ParamTag </b>in the Struts2-<br />
First we create a JSP file named <i><b>success.jsp</b></i> as follows.</p>
<pre class="highlight" name="code"><;%@ page contentType="text/html; charset=UTF-8"%>; 
<;%@ taglib prefix="s" uri="/struts-tags"%>; 
<;html>; 
<;head>; 
<;title>;Action Data Tag Struts2 | dineshonjava.com<;/title>; 
<;/head>; 
<;body>; 
 <;h2>;An example of the param tag: <;/h2>; 
 <;s:bean name="com.dineshonjava.struts2.action.DataTagAction" var="paramTag">; 
 <;s:param name="userName">;Dinesh Rajput<;/s:param>; 
 <;s:param name="userAge">;27<;/s:param>; 
 <;s:param name="userPhone">;9998851234<;/s:param>; 
 <;s:param name="userAddress">;ABC Noida<;/s:param>; 
 <;/s:bean>; 
 
 <;ol>; 
 <;li>;User Name : <;s:property value="#paramTag.userName" />;<;/li>; 
 <;li>;User Age : <;s:property value="#paramTag.userAge" />;<;/li>; 
 <;li>;User Phone : <;s:property value="#paramTag.userPhone" />;<;/li>; 
 <;li>;User Address : <;s:property value="#paramTag.userAddress" />;<;/li>; 
 <;/ol>; 
<;/body>; 
<;/html>; 
</pre>
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<p><b>Configuration file in struts 2.</b><br />
<i><b>struts.xml</b></i></p>
<pre class="highlight" name="code"><;?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.enable.DynamicMethodInvocation" value="false" />; 
 <;constant name="struts.devMode" value="false" />; 
 <;constant name="struts.custom.i18n.resources" value="myapp" />; 
 
 <;package name="default" extends="struts-default" namespace="/">; 
 <;action name="paramtag" class="com.dineshonjava.struts2.action.DataTagAction">; 
 <;result name="success">;/success.jsp<;/result>; 
 <;/action>; 
 <;/package>; 
 <;/struts>; 
</pre>
<p>
<b>Create Action class</b></p>
<pre class="highlight" name="code">package com.dineshonjava.struts2.action; 
 
import com.opensymphony.xwork2.ActionSupport; 
 
/** 
 * @author Dinesh Rajput 
 * 
 */ 
public class DataTagAction extends ActionSupport { 
 
 private static final long serialVersionUID = -7744420104547018874L; 
 
 private String userName; 
 private String userAge; 
 private String userPhone; 
 private String userAddress; 
 
 public String execute() { 
 return SUCCESS; 
 } 
 
 public String sayHello() { 
 return SUCCESS; 
 } 
 
 public String getUserName() { 
 return userName; 
 } 
 
 public void setUserName(String userName) { 
 this.userName = userName; 
 } 
 
 public String getUserAge() { 
 return userAge; 
 } 
 
 public void setUserAge(String userAge) { 
 this.userAge = userAge; 
 } 
 
 public String getUserPhone() { 
 return userPhone; 
 } 
 
 public void setUserPhone(String userPhone) { 
 this.userPhone = userPhone; 
 } 
 
 public String getUserAddress() { 
 return userAddress; 
 } 
 
 public void setUserAddress(String userAddress) { 
 this.userAddress = userAddress; 
 } 
 
} 
</pre>
<p><b>Your <i>web.xml</i> should look like:</b></p>
<pre class="highlight" name="code"><;?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>;Struts2DataTag<;/display-name>; 
 <;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>; 
 <;welcome-file-list>; 
 <;welcome-file>;index.jsp<;/welcome-file>; 
 <;/welcome-file-list>; 
<;/web-app>; 
</pre>
<p>
Right click on the project name and click <b>Export >; WAR</b> File to create a War file. Then deploy this WAR in the Tomcat&#8217;s webapps directory. Finally, start Tomcat server and try to access</p>
<p> <b>URL<i> http://localhost:8080/doj/paramtag.</i></b></p>
<p> This will give you following screen:</p>
<div class="separator" style="clear: both; text-align: center;"><img border="0" src="https://dineshonjava.com/wp-content/uploads/2013/08/44444.png"/></div>
<p>
</div>
<p><b>Download SourceCode</b><br />
<b><a href="https://sites.google.com/a/dineshonjava.com/dineshonjava/dineshonjava/ParamDataTag.zip?attredirects=0&;d=1" target="_blank">ParamDataTagExample.zip</a></b></p>
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