In this example I am trying to create a autocomplete textbox and when you select one value from this autocomplete drop down the other will populate accordingly.
This post is for developers who are new to Struts 2.
This example uses
- Struts 2.0.14 - Download Struts
- apache-tomcat-6.0.18 - Download Tomcat
- java version "1.6.0_10"
- freemarker template (2.3.8) for the second dropdown.
You can use this example as is or play around with it based on your need.
index.jsp :
This page redirects the request to the demo page where autocomplete text box is diplayed.
<%@ taglib prefix="s" uri="/struts-tags" %>
autocomplete.jsp
This page contains the core of this example, the Struts tags for Autocomplete.
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<s:head theme="ajax"/>
<html>
<head>
<title>AutoComplete</title>
</head>
<body>
<s:url id="detailUrl" action="DetailResponse"/>
Link two autocompleter elements. When the selected value in 'Autocompleter 1' changes,
the available values in 'Autocompleter 2' will change also.
<br/>
<form id="selectForm">
<p>Autocompleter 1 <s:autocompleter theme="simple" name="select" list="selectList" value="Colors" notifyTopics="/Changed" forceValidOption="true" id="sel"/></p>
</form>
Autocompleter 2 <s:autocompleter theme="ajax" href="%{#detailUrl}" autoComplete="false" formId="selectForm" listenTopics="/Changed" forceValidOption="true" id="ops"/>
</body>
</html>
options.ftl
This is Freemarker template to render the second drop down, which is populated based on selection in first autocomplete drop down.
[
<#list options as option>
["${option}"],
]
ListingAction.java
This action class is to populate values in the first autocomplete drop down.
package ajaxdemo.action;
import java.util.ArrayList;
import java.util.List;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class ListingAction extends ActionSupport {
private ListselectList = null;
public String execute() throws Exception {
selectList = new ArrayList();
selectList.add("Fruits");
selectList.add("Colors");
return SUCCESS;
}
public List getSelectList() {
return selectList;
}
public void setSelectList(ListselectList) {
this.selectList = selectList;
}
}
DetailAction.java
This is a action class to populate the second autocomplete drop down based on selection value in first drop down.
package ajaxdemo.action;
import java.util.ArrayList;
import java.util.List;
import com.opensymphony.xwork2.ActionSupport;
public class DetailAction extends ActionSupport {
private String select;
private Listoptions = new ArrayList ();
private static final long serialVersionUID = -8481638176160014396L;
public String execute() throws Exception {
if ("Fruits".equalsIgnoreCase(select)) {
options.add("apple");
options.add("banana");
options.add("grape");
options.add("pear");
} else if ("Colors".equalsIgnoreCase(select)) {
options.add("red");
options.add("green");
options.add("blue");
}
return SUCCESS;
}
public String getSelect() {
return select;
}
public void setSelect(String select) {
this.select = select;
}
public ListgetOptions() {
return options;
}
}
struts.xml
Struts config file for action mappings.
<?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>
<package name="demo" extends="struts-default">
<action name="ShowDemo" class="ajaxdemo.action.ListingAction">
<result>/autocomplete.jsp</result>
</action>
<action name="DetailResponse" class="ajaxdemo.action.DetailAction">
<result type="freemarker">/options.ftl</result>
</action>
</package>
</struts>
web.xml
The application deployment descriptor.
<web-app version="2.4" 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>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>
Output
Go the URL http://localhost:8080/ajaxdemo/ in your favorite web browser. The page should look like this.
Web application directory Structure
This is how the application war directory structure should look like.
ajaxdemo/
ajaxdemo/index.jsp
ajaxdemo/autocomplete.jsp
ajaxdemo/options.ftl
ajaxdemo/WEB-INF/web.xml
ajaxdemo/WEB-INF/classes/struts.xml
ajaxdemo/WEB-INF/classes/ajaxdemo/action/DetailAction.class
ajaxdemo/WEB-INF/classes/ajaxdemo/action/ListingAction.class
ajaxdemo/WEB-INF/lib/*.jar
Here are the list of jar files you need to have in your application WEB-INF/lib dir.
antlr-2.7.2.jar
aopalliance-1.0.jar
classworlds-1.1.jar
commons-beanutils-1.7.0.jar
commons-chain-1.1.jar
commons-codec-1.3.jar
commons-collections-2.1.jar
commons-collections-3.1.jar
commons-digester-1.6.jar
commons-digester-1.8.jar
commons-el-1.0.jar
commons-fileupload-1.1.1.jar
commons-io-1.1.jar
commons-lang-2.1.jar
commons-logging-1.0.4.jar
commons-logging-api-1.1.jar
commons-validator-1.3.0.jar
dwr-1.1-beta-3.jar
freemarker-2.3.8.jar
jstl-1.1.0.jar
log4j-1.2.9.jar
myfaces-api-1.1.2.jar
myfaces-impl-1.1.2.jar
ognl-2.6.11.jar
oro-2.0.8.jar
plexus-container-default-1.0-alpha-10.jar
plexus-utils-1.2.jar
sitemesh-2.2.1.jar
spring-beans-2.0.5.jar
spring-context-2.0.5.jar
spring-core-2.0.5.jar
spring-web-2.0.5.jar
struts-core-1.3.5.jar
struts2-codebehind-plugin-2.0.14.jar
struts2-config-browser-plugin-2.0.14.jar
struts2-core-2.0.14.jar
struts2-jsf-plugin-2.0.14.jar
struts2-sitemesh-plugin-2.0.14.jar
struts2-struts1-plugin-2.0.14.jar
struts2-tiles-plugin-2.0.14.jar
tiles-api-2.0.4.jar
tiles-core-2.0.4.jar
tiles-jsp-2.0.4.jar
velocity-1.4.jar
velocity-dep-1.4.jar
velocity-tools-1.1.jar
xml-apis-1.0.b2.jar
xwork-2.0.7.jar
Download ajaxdemo.war here
Hey, Thanks for this handy example. I just tried running the same code using Struts 2.1.8 dependancies and got this error. Do you have some clue?
SEVERE: Exception starting filter struts2
Class: com.opensymphony.xwork2.spring.SpringObjectFactory
File: SpringObjectFactory.java
Method: getClassInstance
Line: 209 - com/opensymphony/xwork2/spring/SpringObjectFactory.java:209:-1
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431)
at org.apache.struts2.dispatcher.FilterDispatcher.i n it(FilterDispatcher.java:190)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3709)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4363)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:830)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:719)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.NullPointerException
at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:209)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:519)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:490)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:446)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:264)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
at org.apache.struts2.dispatcher.Dispatcher.in it_PreloadConfiguration(Dispatcher.java:374)
at org.apache.struts2.dispatcher.Dispatcher.in it(Dispatcher.java:418)
... 28 more
Oct 29, 2009 5:43:17 PM org.apache.catalina.core.StandardContext start
SEVERE: Error filterStart
@Dave - I have not tested this example on Struts 2.1.8 and from my experience I can say it will NOT work as it is.
1. I tried running this directly on struts 2.1.8 dependencies and I can see there are much more errors to fix.
2. There are some tag lib changes in Struts 2.1.8 which needs to be incorporated in the JSPs.
3. Will update this post if I am able to get a Struts 2.1.8 version for same example.
BTW, on a sidenote, I don't really understand why Struts 2.1.8 is not easily backward compatible with 2.0.14?
Update 1: I tried checking the showcase application for struts 2.1.8 and it seems this example doesn't work on showcase application either. So there must be something broken in 2.1.8
Hi ,
I worked with this code , it works successfully it shows the value into the 1st dropdown list .
we are able to select the value from 1st dropdown list but second dropdown list is empty....
could you tell me reson....
hi
I want to populate table from database using autocompleter value. any help will be appreciated.
thanks
WTHAT'S DIS..WHY SO MANY JARS...SPRING JARS ETC ????
how to implement this in Struts 2.2 or struts 2.3...we dont have struts' autocompleter tag..we have struts' dojo tag..
do anyone know anything about this???
above code in not working
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