How to use display tags with Struts 2x ?

1. Add displaytag-1.1.1.jar in your libraries and classpath of your project.

2. Add displaytag-11.tld under /WEB-INF directory.

3. Add a java file I18nStruts2Adapter.java under any package (i.e. com.shaan.common)

package com.shaan.common;

import java.util.Iterator;

import java.util.Locale;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.jsp.PageContext;

import javax.servlet.jsp.tagext.Tag;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.struts2.views.jsp.TagUtils;

import org.displaytag.Messages;

import org.displaytag.localization.I18nResourceProvider;

import org.displaytag.localization.LocaleResolver;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.LocaleProvider;

import com.opensymphony.xwork2.TextProvider;

import com.opensymphony.xwork2.util.ValueStack;

// Struts2 implementation of a resource provider and locale resolver

public class I18nStruts2Adapter implements LocaleResolver, 

                                           I18nResourceProvider {

 // prefix/suffix for missing entries.

 public static final String UNDEFINED_KEY = "???"; //$NON-NLS-1$

 // logger

 private static Log log = 

                 LogFactory.getLog(I18nStruts2Adapter.class);

 public Locale resolveLocale(HttpServletRequest request) {

  Locale result = null;

  ValueStack stack = ActionContext.getContext().getValueStack();

  Iterator iterator = stack.getRoot().iterator();

  while (iterator.hasNext()) {

    Object o = iterator.next();

    if (o instanceof LocaleProvider) {

         LocaleProvider lp = (LocaleProvider) o;

         result = lp.getLocale();

         break;

    }

  }

  if (result == null) { 

    log.debug("Missing LocalProvider actions, init locale to default");

    result = Locale.getDefault();

  }

  return result; 

 }

 public String getResource(String resourceKey, String defaultValue, 

                           Tag tag, PageContext pageContext) {

   // if resourceKey isn't defined either, use defaultValue

   String key = (resourceKey != null) ? resourceKey : defaultValue;

   String message = null;

   ValueStack stack = TagUtils.getStack(pageContext);

   Iterator iterator = stack.getRoot().iterator();

   while (iterator.hasNext()) {

      Object o = iterator.next();

      if (o instanceof TextProvider) {

          TextProvider tp = (TextProvider) o;

          message = tp.getText(key);

          break;

      }

   }

   // if user explicitely added a titleKey

   if (message == null && resourceKey != null) {

       log.debug(Messages.getString("Localization.missingkey", 

                   resourceKey)); // $NON-NLS-1$

       message = UNDEFINED_KEY + resourceKey + UNDEFINED_KEY;

   }

   return message;

 }

}

4. Add displaytag_en.properties under your source folder directly without any package. You should define your I18nStruts2Adapter Java file as the locale resolver  and provider in this file. # Display tag library 1.1.1 # The display tag library is an open source suite of custom tags that provide high-level web # presentation patterns which will work in an MVC model. # The library provides a significant amount of functionality while still being easy to use. # http://displaytag.sourceforge.net/11/ sort.behavior=list sort.amount=list basic.msg.empty_list=<div class="textError">There is no result in your search</div><ul><li CLASS="triangleOrange"><a href="javascript:history.go(-1)" mce_href="javascript:history.go(-1)" mce_href="javascript:history.go(-1)" class="smallLinkOrangeBold">New search</a></li></ul> paging.banner.no_items_found=<div class="textError">There is no result in your search.</div><ul><li CLASS="triangleOrange"><a href="javascript:history.go(-1)" mce_href="javascript:history.go(-1)" mce_href="javascript:history.go(-1)" class="smallLinkOrangeBold">New search</a></li></ul> paging.banner.all_items_found=<table width="100%"><tr><td><div class='note'>Result: {0} answer(s)</div></td> paging.banner.some_items_found=<table width="100%"><tr><td><div class='note'>Result: {0} answer(s)</div></td> paging.banner.full=<td align='right'><span class="note" >pages : <a href="{2}" mce_href="{2}" mce_href="{2}" class="smallLink">[previous]</a> {0} <a href="{3}" mce_href="{3}" mce_href="{3}" class="smallLink">[next]</a></span></td></tr></table> paging.banner.first=<td align='right'><span class="note ">pages : {0} <a href="{3}" mce_href="{3}" mce_href="{3}" class="smallLink">[next]</a> </span></td></tr></table> paging.banner.last=<td align='right'><span class="note" >pages : <a href="{2}" mce_href="{2}" mce_href="{2}" class="smallLink">[previous]</a> {0}</span></td></tr></table> paging.banner.onepage= paging.banner.one_item_found= paging.banner.page.selected=<span class="textBoldOrange">{0}</span> paging.banner.page.link=<a href="{1}" mce_href="{1}" mce_href="{1}" title="Go to the page {0}" CLASS="inkDeco">{0}</a> paging.banner.page.separator= paging.banner.group_size=10 # ====================== StyleSheet CSS css.tr.even=rowEven css.tr.odd=rowOdd css.tr.even=rowEven css.tr.odd=rowOdd css.table=osuit-Table # ====================== I18 resolver and provider locale.resolver=com.shaan.common.I18nStruts2Adapter locale.provider=com.shaan.common.I18nStruts2Adapter

5. You can add other locale specific properties files to have messages in different langugages.

For example : displaytag_fr.properties

6. Make data structures in Struts 2 Actions and use display tag in your JSP Action class ArrayList myList; public ArrayList getMyList() {    return myList; } public void setMyList(ArrayList myList) {    this.myList = myList; } public String input() {    myList = new ArrayList();    HashMap map = new HashMap();    map.put("number", "2");    map.put("description", "hello");    map.put("standard", "A1");    myList.add(map);    map = new HashMap();    map.put("number", "5");    map.put("description", "bye");    map.put("standard", "A2");    myList.add(map);    map = new HashMap();    map.put("number", "10");    map.put("description", "shree");    map.put("standard", "B2");    myList.add(map);    return "input"; } JSP page <!-- Add display tag TLD --> <%@ taglib uri="http://displaytag.sf.net" prefix="display"%> <display:table name="myList" pagesize="2" uid="row" requestURI=""                 sort="list" class="osuit-Table">    <display:column property="number" headerClass="osuit-Headers"                     sortable="true" />    <display:column property="description" headerClass="osuit-Headers" />    <display:column property="standard" headerClass="osuit-Headers" /> </display:table>