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From sunitha <sunitha.me...@bqtech.co.in>
Subject using ajax to populate select box
Date Fri, 30 Dec 2011 06:02:44 GMT
Hi all,
I am having two select boxes in my jsp page. I need to populate second
select box depending upon the value selected in first select box. I am able
to do this. But the problem is i am not getting the value selected in the
second select box in the action class. i have provided getters and setters
for both select boxes.

The code snippets are given below

index.jsp
----------

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC &quot;-//W3C//DTD HTML 4.01 Transitional//EN&quot;
&quot;http://www.w3.org/TR/html4/loose.dtd&quot;>
<html>
<head>
<s:head theme="ajax" />
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>

</head>
<body>
<s:form id="innerForm" name="innerForm">
<table>
<tr>
<td>TRANSPORTER:</td>
<td><s:select list="{'APPOLO','RAJENDRA','SUMAN'}"
headerKey="0" headerValue="-Please Select-"
onchange="show_details()" id="sel_transporter"
name="sel_transporter">
</s:select></td>
</tr>
<tr>
<td>TRUCK:</td>
<s:url action="populateTruckAction" id="truck_url" />
<td><s:div href="%{truck_url}" listenTopics="populate"
formId="innerForm" theme="ajax" id="truckDiv"></s:div>
</td>
</tr>
<tr>
<td>Submit:</td>
<td><a id=&quot;print_anchor&quot; href=&quot;&lt;s:url
action='printAction'/>">PRINT
</td>
</tr>
</table>
</s:form>
</body>
</html>


trucklist.jsp
------------


<%@ taglib prefix="s" uri="/struts-tags"%>
<s:select list="truckList" headerKey="1" name="sel_truck"
id="sel_truck"></s:select>

result.jsp
-----------

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC &quot;-//W3C//DTD HTML 4.01 Transitional//EN&quot;
&quot;http://www.w3.org/TR/html4/loose.dtd&quot;>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<s:form name="form1">
Transporter:<s:property value="sel_transporter"/>
Truck:<s:property value="sel_truck"/>
</s:form>
</body>
</html>

struts.xml
-----------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
&quot;-//Apache Software Foundation//DTD Struts Configuration 2.0//EN&quot;
&quot;http://struts.apache.org/dtds/struts-2.0.dtd&quot;>
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="false" />
<package name="" extends="struts-default">
<action name="populateTruckAction" class="com.sample.MainAction"
method="populateTruck">
<result name="input">/index.jsp</result>
<result name="success">/trucklist.jsp</result>
</action>
<action name="printAction" class="com.sample.MainAction"
method="print">
<result name="success">/result.jsp</result>
</action>
</package>
</struts>


MainAction.java
-----------------

package com.sample;

import java.util.LinkedList;

import com.opensymphony.xwork2.ActionSupport;

public class MainAction extends ActionSupport {
private static String sel_transporter;
private static String sel_truck;
private LinkedList<String> transList = new LinkedList<String>();
private LinkedList<String> truckList = new LinkedList<String>();

public String populateTruck() {
System.out.println("inside populate Truck...." + sel_transporter);
if (sel_transporter.equals("APPOLO")) {
truckList.add("APP01");
truckList.add("APP02");
} else if (sel_transporter.equals("RAJENDRA")) {
truckList.add("RAJ01");
truckList.add("RAJ02");
} else {
truckList.add("SUM01");
truckList.add("SUM02");
}
return SUCCESS;
}

public String print() {
System.out.println(getSel_transporter()+"---"+getSel_truck());
return SUCCESS;
}

public String getSel_transporter() {
return sel_transporter;
}

public void setSel_transporter(String sel_transporter) {
MainAction.sel_transporter = sel_transporter;
}

public String getSel_truck() {
return sel_truck;
}

public void setSel_truck(String sel_truck) {
MainAction.sel_truck = sel_truck;
}

public LinkedList<String> getTransList() {
return transList;
}

public void setTransList(LinkedList<String> transList) {
this.transList = transList;
}

public LinkedList<String> getTruckList() {
return truckList;
}

public void setTruckList(LinkedList<String> truckList) {
this.truckList = truckList;
}
}


Looking forward to hear from you....

Regards,
Sunitha 

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