a tag example in Struts2

Struts 2 “a” tag is used to render a HTML “<a>” tag. The best practice is always use “<s:url>” tag to create the URL and embed it into the “a” tag.

Create Action class:

package com.dineshonjava.struts2.action;

import com.opensymphony.xwork2.ActionSupport;

 * @author Dinesh Rajput
public class DataTagAction extends ActionSupport {

 private static final long serialVersionUID = -7744420104547018874L;
 public String execute() {
  return SUCCESS;

Create views-
Let us have index.jsp file as follows:

<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<title>A Data Tag Struts2 | dineshonjava.com</title>
<h2>A Data Tag Struts2</h2>
<s:url value="https://www.dineshonjava.com" var="dojURL" />
<s:a href="%{dojURL}">Dinesh On Java</s:a>

<s:url action="atag" var="atagURL" />
<s:a href="%{atagURL}">a Tag Action</s:a>

Configuration Files
Your struts.xml should look like:

<?xml version="1.0" encoding="UTF-8" ?>
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    <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="atag" class="com.dineshonjava.struts2.action.DataTagAction">
            <result name="success">/success.jsp</result>

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">

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/index.jsp.

This will give you following screen:

a tag example in Struts2

Download SourceCode
a DataTagExample.zip

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