juni stephen wrote:
> Hi all,
>
> i am new to struts2.. am struggling to get the result for populating items
> from DB.
>
> my requirement is to populate country, which is stored in DB, using struts2
> and when u choose a particular country, another select box populate its
> cities, which also stored in DB..
>
> at first i tried, fetching the list from java class instead of DB... since
> there is an example available in
> struts2-showcase-2.0.14,built in project of struts2.
>
> when i imported struts2-showcase-2.0.14 and tried that program the
> <s:select> is working.. so i thought to implement that into my project.. but
> unfortunately it is not working..
>
> i will post here and please have a look and try providing the reason :)
>
> I paste here the example block of a program from struts2-showcase-2.0.14 :
>
> Portion of Jsp file contains the list Like : [b]example.jsp[/b]
>
> <s:form action="exampleSubmit" >
> <s:select
> tooltip="Choose Your Favourite Language"
> label="Favourite Language"
> list="favouriteLanguages"
> name="favouriteLanguage"
> listKey="key"
> listValue="description"
> emptyOption="true"
> headerKey="None"
> headerValue="None"/>
>
>
> portion of java class file contains like the following:
> [b]UITagExample.java[/b]
>
> package com.mobitail.action; // i pasted this since i mentioned this in
> struts.xml - you should not confuse :)
>
> public String execute() throws Exception {
> return SUCCESS;
> }
>
> //constructor
> public UITagExample() {
> favouriteLanguages.add(new Language("EnglishKey", "English Language"));
> favouriteLanguages.add(new Language("FrenchKey", "French Language"));
> favouriteLanguages.add(new Language("SpanishKey", "Spanish Language"));
> }
>
> public List getFavouriteLanguages() {
> return favouriteLanguages;
> }
>
>
> public void setFavouriteLanguage(String favouriteLanguage) {
> this.favouriteLanguage = favouriteLanguage;
> }
>
> public String getFavouriteLanguage() {
> return favouriteLanguage;
> }
>
> // === inner class
> public static class Language {
> String description;
> String key;
>
> public Language(String key, String description) {
> this.key = key;
> this.description = description;
> }
>
> public String getKey() {
> return key;
> }
> public String getDescription() {
> return description;
> }
>
> }
>
> portion of [b]struts.xml[/b]
>
> <action name="exampleSubmit" class="com.mobitail.action.UITagExample" >
> <result>example.jsp</result>
> <result name="input">example.jsp</result>
> </action>
>
>
> when i execute http://localhost:8080/mobitail.com/example.jsp .. result is a
> blank page
>
> if example.jsp contains other tags like <s:textfield> with <s:select> ,
> result is only a textfield .. select box is not shown...
>
> and in the Eclipse Ganymede output window, the error is like the following:
>
> SEVERE: Servlet.service() for servlet jsp threw exception
> tag 'select', field 'list', name 'favouriteLanguage': The requested list key
> 'favouriteLanguages' could not be resolved as a
> collection/array/map/enumeration/iterator type. Example: people or
> people.{name} - [unknown location]
> at org.apache.struts2.components.Component.fieldError(Component.java:231)
> at org.apache.struts2.components.Component.findValue(Component.java:293)
> at
> org.apache.struts2.components.ListUIBean.evaluateExtraParams(ListUIBean.java:79)
>
> at org.apache.struts2.components.Select.evaluateExtraParams(Select.java:99)
> at org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:780)
> at org.apache.struts2.components.UIBean.end(UIBean.java:481)
> at
> org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:43)
>
> at
> org.apache.jsp.example_jsp._jspx_meth_s_005fselect_005f0(example_jsp.java:383)
>
> at
> org.apache.jsp.example_jsp._jspx_meth_s_005fform_005f0(example_jsp.java:244)
>
> at org.apache.jsp.example_jsp._jspService(example_jsp.java:111)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
>
> at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>
> at
> org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:416)
>
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
>
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
>
> at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
> at java.lang.Thread.run(Unknown Source)
>
>
>
> I explained every single point detail in manner... i hope you guys can help
> me by seeing this..
>
>
> Please don't tell me to try the following: i tried and its working :)
> <s:select
> tooltip="Choose Your Favourite Color"
> label="Favorite Color"
> list="{'Red', 'Blue', 'Green'}"
> name="favouriteColor"
> emptyOption="true"
> headerKey="None"
> headerValue="None"/>
>
> i need to populate from DB or from java class, like i explained at top
>
>
> Thanks in advance...
>
> I hope this post helps you lot...
>
> Cheers!!!
> Unnii
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscr...@struts.apache.org
For additional commands, e-mail: user-h...@struts.apache.org
