how to populate multiple select ,when one select value is selected other should be populated.

[pinky deshmukh]

Hi All,
I have 3,4 select in my first.jsp page.

when i select Country in first select, i should be able to populate second select with states in that country, when i select state,city select should be populated. and when i select city ,area select should be populated. all these values will be populated from database.

i have tried approach :

like my jsp page is

<script>
function showValue(v1)
{
document.getElmenetById("form1").setAttribute("action",value);
document.getElmenetById("form1").submit();
}
</script>
<s:form action="addcustomer">
<s:textfile name="name"/>

<s:select list="countryList" name="countryList" onchange=form.submit();/>
<s:select list="stateList" name="stateList" onchange=form.submit();/>
<s:select list="cityList" name="cityList" onchange=form.submit();/>
<s:select list="regionList" name="regionList" onchange=form.submit();/>

</s:form>
<s:form id="form1">
</s:form>

[/code]

struts.xml

<action name="adduser" class="AddCustomerAction" method="populateCountry">
<result name="SUCCESS">/first.jsp</result>
</action>
<action name="stateList" class="AddCustomerAction" method="populateState">
<result name="SUCCESS">/first.jsp</result>
</action>
<action name="cityList" class="AddCustomerAction" method="populateCity">
<result name="SUCCESS">/first.jsp</result>
</action>
<action name="regionList" class="AddCustomerAction" method="populateRegion">
<result name="SUCCESS">/first.jsp</result>
</action>
<action name="addcustomer" class="AddCustomerAction">
<result name="SUCCESS">/home.jsp</result>
</action>

[/code]
and corresponding action class is

public class AddCustomerAction extends ActionSupport
{
private HashMap countryList;
private HashMap stateList;
private HashMap cityList;
private HashMap regionList;

//all these action attributes has getter and setter

public String populateCountry()
{
countryList = new HashMap();
// these values are populated from db
countryList.put(1,"India"); 
countryList.put(1,"USA");
countryList.put(1,"UK");
}

// like this all the method have been implemented
}

But i am not getting the correct result.
get exception
HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: tag 'select', field 'list', name 'countryList': The requested list key 'countryList' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:548)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:471)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)

OR Is there any other way thru which i can resolve this problem.?

Thanks

[Maneesh Godbole]

In future, while posting code, please UseCodeTags properly. Before posting, you can use the "Preview" Button. After posting you can use the to make modifications

[pinky deshmukh]

pinky deshmukh wrote:Hi All,
I have 3,4 select in my first.jsp page.

when i select Country in first select, i should be able to populate second select with states in that country, when i select state,city select should be populated. and when i select city ,area select should be populated. all these values will be populated from database.

i have tried approach :

like my jsp page is

<script>
function showValue(v1)
{
document.getElmenetById("form1").setAttribute("action",value);
document.getElmenetById("form1").submit();
}
</script>
<s:form action="addcustomer">
<s:textfile name="name"/>

<s:select list="countryList" name="countryList" onchange=form.submit();/>
<s:select list="stateList" name="stateList" onchange=form.submit();/>
<s:select list="cityList" name="cityList" onchange=form.submit();/>
<s:select list="regionList" name="regionList" onchange=form.submit();/>

</s:form>
<s:form id="form1">
</s:form>

[/code]

struts.xml

<action name="adduser" class="AddCustomerAction" method="populateCountry">
<result name="SUCCESS">/first.jsp</result>
</action>
<action name="stateList" class="AddCustomerAction" method="populateState">
<result name="SUCCESS">/first.jsp</result>
</action>
<action name="cityList" class="AddCustomerAction" method="populateCity">
<result name="SUCCESS">/first.jsp</result>
</action>
<action name="regionList" class="AddCustomerAction" method="populateRegion">
<result name="SUCCESS">/first.jsp</result>
</action>
<action name="addcustomer" class="AddCustomerAction">
<result name="SUCCESS">/home.jsp</result>
</action>

[/code]
and corresponding action class is

public class AddCustomerAction extends ActionSupport
{
private HashMap countryList;
private HashMap stateList;
private HashMap cityList;
private HashMap regionList;

//all these action attributes has getter and setter

public String populateCountry()
{
countryList = new HashMap();
// these values are populated from db
countryList.put(1,"India"); 
countryList.put(1,"USA");
countryList.put(1,"UK");
}

// like this all the method have been implemented
}

But i am not getting the correct result.
get exception
HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: tag 'select', field 'list', name 'countryList': The requested list key 'countryList' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:548)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:471)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)

OR Is there any other way thru which i can resolve this problem.?

Thanks

can anybody suggest any other approach or tell me where am I going wrong?