The struts include tag is very similar to the jsp include tag and it is rarely used. We have seen how to include the output of a struts action into a jsp using the <s:action> tags. The <s:include> tag is slightly different. It allows you to include the output of a jsp, servlet or any other resource (something other than a struts action) into a jsp. Behind the scenes it is exactly similar to the <jsp:include>, but it allows you to pass parameters to the included file and it is also part of Struts framework.
Add the following code snippet into the struts.xml file.
<?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="includetag" class="com.dineshonjava.struts2.action.DataTagAction"> <result name="success">/success.jsp</result> </action> </package> </struts>
Create an action class as shown below:
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; public String execute() { return SUCCESS; } public String sayHello() { return SUCCESS; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } }
Create a View.
Let us have index.jsp to demonstrate the use of the generator tag:
<%@ 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>Generator Control Tag in Struts2</h2> <h3>The User Name:</h3> <s:generator val="%{'Dinesh,Sweety,Anamika, Aadesh,Vinesh,Ankit,Honey '}" count="7" separator=","> <s:iterator> <s:property /><br/> </s:iterator> </s:generator> </body> </html>
Next let us have success.jsp with the following content:
<%@ 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 include tag: </h2> <s:include value="index.jsp"/> </body> </html>
Your web.xml should look like:
<?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>
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/doj/includetag.
This will give you following screen:
Download SourceCode
IncludeDataTagExample.zip
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