Merge tag example in struts2 framework
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Struts2 framework provide Merge component to mixed two different list and map item and print on the browser.
<s:merge var=""> <s:param value="" /> </s:merge>The struts2 framework provide following merge tag example,<s:merge var="TeacherIterator"> <s:param value="%{malemap}" /> <s:param value="%{femalemap}" /> </s:merge>
Directory Structure of <s:merge> tag Example in Struts 2.0 Using MyEclipse IDEindex.jsp<%@ taglib uri="/struts-tags" prefix="s" %> <h1>Merge Tag Example in Struts2 Framework</h1> 1.Combine Two ArrayList into a single iterator. <s:merge var="StudentIterator"> <s:param value="%{boyslist}" /> <s:param value="%{girlslist}" /> </s:merge> <ol> <s:iterator value="%{#StudentIterator}"> <li><s:property /></li> </s:iterator> </ol> 2. Combine Two Map into a single iterator. <s:merge var="TeacherIterator"> <s:param value="%{malemap}" /> <s:param value="%{femalemap}" /> </s:merge> <ol> <s:iterator value="%{#TeacherIterator}"> <li><s:property /></li> </s:iterator> </ol> 3. Combine BoysList and MaleMap into a single iterator. <s:merge var="both1Iterator"> <s:param value="%{malemap}" /> <s:param value="%{boyslist}" /> </s:merge> <ol> <s:iterator value="%{#both1Iterator}"> <li><s:property /></li> </s:iterator> </ol> 4. Combine GirlsList and FemaleMap into a single iterator. <s:merge var="both2Iterator"> <s:param value="%{femalemap}" /> <s:param value="%{girlslist}" /> </s:merge> <ol> <s:iterator value="%{#both2Iterator}"> <li><s:property /></li> </s:iterator> </ol>web.xml<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter> <filter-name>f1</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>f1</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>struts.xml<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"> <struts> <package name="demo" extends="struts-default"> <action name="" class="org.r4r.MergeTagAction"> <result name="success" type="dispatcher">/index.jsp</result> </action> </package> </struts>MergeTagAction.java
package org.r4r; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; public class MergeTagAction { List<String> boyslist; List<String> girlslist; Map<String,String> malemap; Map<String,String> femalemap; public String execute(){ boyslist=new ArrayList<String>(); boyslist.add("Mukund(BOYS)"); boyslist.add("Harsh(BOYS)"); boyslist.add("Somaru(BOYS)"); boyslist.add("Pramod(BOYS)"); boyslist.add("Sushant(BOYS)"); girlslist=new ArrayList<String>(); girlslist.add("Suman(Girls)"); girlslist.add("Raman(Girls)"); girlslist.add("Radha(Girls)"); girlslist.add("Kavita(Girls)"); girlslist.add("Babita(Girls)"); malemap=new HashMap<String, String>(); malemap.put("one","R.K.Singh(Male)"); malemap.put("two","H.Vardhan(Male)"); malemap.put("three","B.M.K.Singh(Male)"); malemap.put("four","R.K.Rana(Male)"); malemap.put("five","Ramu yadav(Male)"); femalemap=new HashMap<String, String>(); femalemap.put("one","Kavita Dahima(Female)"); femalemap.put("two","Suman Singh(Female)"); femalemap.put("three","Kanchan Bala(Female)"); femalemap.put("four","Babita Singh(Female)"); femalemap.put("five","Radha(Female)"); return "success"; } public List<String> getBoyslist() { return boyslist; } public void setBoyslist(List<String> boyslist) { this.boyslist = boyslist; } public List<String> getGirlslist() { return girlslist; } public void setGirlslist(List<String> girlslist) { this.girlslist = girlslist; } public Map<String, String> getMalemap() { return malemap; } public void setMalemap(Map<String, String> malemap) { this.malemap = malemap; } public Map<String, String> getFemalemap() { return femalemap; } public void setFemalemap(Map<String, String> femalemap) { this.femalemap = femalemap; } }Output
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