Primefaces选项列表组件存在问题。点击按钮我正在初始化DualListModel对象。在源列表和目标列表中都有String对象。这是我的代码。 XHTML：`
private DualListModel<String> userTokensList;
Java代码：
List<String> sourceList=new ArrayList<String>();
List<String> targetList=new ArrayList<String>();
sourceList.add("abc");
sourceList.add("234");
targetList.add("1234");
targetList.add("980");
userTokensList=new DualListModel<String>(sourceList, targetList);
//setters and getters provided`
按下GO按钮后，将调用以下代码。
StackTrace:java.lang.ClassCastException: java.lang.String incompatible with org.primefaces.model.DualListModel
at org.primefaces.component.picklist.PickListRenderer.encodeMarkup(PickListRenderer.java:66)
at org.primefaces.component.picklist.PickListRenderer.encodeEnd(PickListRenderer.java:59)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:535)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:626)
at org.apache.myfaces.context.servlet.PartialViewContextImpl$PhaseAwareVisitCallback.processRenderComponent(PartialViewContextImpl.java:559)
at org.apache.myfaces.context.servlet.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:537)
at org.apache.myfaces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:207)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:773)
at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1007)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1007)
at javax.faces.component.UIForm.visitTree(UIForm.java:269)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1007)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1007)
at org.apache.myfaces.context.servlet.PartialViewContextImpl.processPartialRendering(PartialViewContextImpl.java:426)
at org.apache.myfaces.context.servlet.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:346)
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:60)
at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:390)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:617)
at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.renderView(FaceletViewDeclarationLanguage.java:1320)
at org.apache.myfaces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:263)
at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:85)
at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:240)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:191)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1227)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:776)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:458)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.invokeTarget(WebAppFilterChain.java:136)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:97)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:100)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
at com.csx.rarsafety.filter.RendererFilter.doFilter(RendererFilter.java:285)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
at com.csx.rarsafety.view.user.NoCompatibilityMode.doFilter(NoCompatibilityMode.java:26)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
at com.csx.enterprise.webframework.security.CSXSamlSecurityFilter.doFilter(CSXSamlSecurityFilter.java:59)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:928)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1025)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:909)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:200)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:459)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:526)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:312)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:283)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.determineNextChannel(SSLConnectionLink.java:1048)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.readyInboundPostHandshake(SSLConnectionLink.java:716)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink$MyHandshakeCompletedCallback.complete(SSLConnectionLink.java:412)
at com.ibm.ws.ssl.channel.impl.SSLUtils.handleHandshake(SSLUtils.java:1066)
at com.ibm.ws.ssl.channel.impl.SSLHandshakeIOCallback.complete(SSLHandshakeIOCallback.java:87)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1862)
在尝试加载页面后按下“GO＆＃39;按钮得到以下错误。
SELECT count(id_item), field1, field2, field3
FROM `tes2`
order by 0 desc
由于我只使用String对象，因此我认为不需要使用任何自定义转换器。请建议
答案 0 :(得分：0)
问题是你在
的末尾有一个空格value="#{userAdministrationBean.userTokensList} "
删除它，之后适合我。
错误消息肯定会更好！