java wicket error!
This is my code,
package com.mywicketapp;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.form.AjaxFormSubmitBehavior;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.model.Model;
import org.apache.wicket.util.string.Strings;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.extensions.ajax.markup
.html.autocomplete.AutoCompleteTextField;
public class HomePage extends WebPage
{
public HomePage()
{
Form form = new Form("form");
add(form);
final AutoCompleteTextField field =
new AutoCompleteTextField("auto", new Model(""))
{
protected Iterator getChoices(String input)
{
if (Strings.isEmpty(input))
{
return Collections.EMPTY_LIST.iterator();
}
List choices = new ArrayList(10);
Locale[] locales = Locale.getAvailableLocales();
for (int i = 0; i < locales.length; i++)
{
final Locale locale = locales[i];
final String country = locale.getDisplayCountry();
if (country.toUpperCase().startsWith(input.toUpperCase()))
{
choices.add(country);
if (choices.size() == 10)
{
break;
}
}
}
return choices.iterator();
}
};
form.add(field);
final Label label = new
Label("selectedValue", field.getModel());
label.setOutputMarkupId(true);
form.add(label);
field.add(new AjaxFormSubmitBehavior(form, "onchange")
{
protected void onSubmit(AjaxRequestTarget target)
{
target.addComponent(label);
}
@Override
protected void onError(AjaxRequestTarget target)
{
}
});
}
}
This is my application code:
package com.mywicketapp;
import org.apache.wicket.protocol.http.WebApplication;
/**
* Application object for your web application. If you want to run this application without deploying, run the Start class.
*
* @see com.mywicketapp.Start#main(String[])
*/
public class WicketApplication extends WebApplication
{
/**
* Constructor
*/
public WicketApplication()
{
}
/**
* @see org.apache.wicket.Application#getHomePage()
*/
public Class<HomePage> getHomePage(){
return HomePage.class;
}
}
Some html:
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
The textfield below will autocomplete country names
<br><hr>
<form wicket:id="form">
Selected value is: <span wicket:id="selectedValue"></span>
<br/>
Country: <开发者_如何学运维;input type="text" wicket:id="auto" size="20"/>
</form>
</body>
</html>
And the error:
- log - Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog
>>> STARTING EMBEDDED JETTY SERVER, PRESS ANY KEY TO STOP
INFO - log - jetty-6.1.25
INFO - log - NO JSP Support for /, did not find org.apache.jasper.servlet.JspServlet
WARN - log - failed wicket.mywicketapp: java.lang.ClassCastException: wicket.extensions.Initializer cannot be cast to org.apache.wicket.IInitializer
ERROR - log - Failed startup of context org.mortbay.jetty.webapp.WebAppContext@66e7b3f2{/,src/main/webapp}
java.lang.ClassCastException: wicket.extensions.Initializer cannot be cast to org.apache.wicket.IInitializer
at org.apache.wicket.Application.addInitializer(Application.java:864)
at org.apache.wicket.Application.load(Application.java:938)
at org.apache.wicket.Application.initializeComponents(Application.java:715)
at org.apache.wicket.protocol.http.WicketFilter.init(WicketFilter.java:732)
at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:662)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1272)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:489)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at com.mywicketapp.Start.main(Start.java:43)
INFO - log - Started SelectChannelConnector@0.0.0.0:8080
Looks to me like you have a version incompatibility problem... Check to make sure that the version of wicket-extensions that you're using is compatible with your wicket version. The wicket.extensions.Initializer that's getting loaded and causing the exception is surely getting loaded up by your AutoCompleteTextField.
加载中,请稍侯......
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