Question

我正在尝试使用Primefaces 5制作表格过滤器，但过滤不会发生并得到以下堆栈：

java.lang.NullPointerException at org.primefaces.component.datatable.feature.FilterFeature.filter（FilterFeature.java:136）在 org.primefaces.component.datatable.feature.FilterFeature.encode（FilterFeature.java:105）在 org.primefaces.component.datatable.DataTableRenderer.encodeEnd（DataTableRenderer.java:77）在 javax.faces.component.UIComponentBase.encodeEnd（UIComponentBase.java:919）在javax.faces.component.UIComponent.encodeAll（UIComponent.java:1903）在 com.sun.faces.context.PartialViewContextImpl $ PhaseAwareVisitCallback.visit（PartialViewContextImpl.java:559）在 com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback（PartialVisitContext.java:183）在org.primefaces.component.api.UIData.visitTree（UIData.java:692）at javax.faces.component.UIComponent.visitTree（UIComponent.java:1740）at at javax.faces.component.UIComponent.visitTree（UIComponent.java:1740）at at com.sun.faces.context.PartialViewContextImpl.processComponents（PartialViewContextImpl.java:399）在 com.sun.faces.context.PartialViewContextImpl.processPartial（PartialViewContextImpl.java:319）在 org.primefaces.context.PrimePartialViewContext.processPartial（PrimePartialViewContext.java:60）在 javax.faces.component.UIViewRoot.encodeChildren（UIViewRoot.java:1004）在javax.faces.component.UIComponent.encodeAll（UIComponent.java:1896）在 com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView（FaceletViewHandlingStrategy.java:425）在 com.sun.faces.application.view.MultiViewHandler.renderView（MultiViewHandler.java:131）在 com.sun.faces.lifecycle.RenderResponsePhase.execute（RenderResponsePhase.java:120）在com.sun.faces.lifecycle.Phase.doPhase（Phase.java:101）at com.sun.faces.lifecycle.LifecycleImpl.render（LifecycleImpl.java:219）在javax.faces.webapp.FacesServlet.service（FacesServlet.java:647）at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:301）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在 org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:239）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在 org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter（MonitorFilter.java:393）在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:239）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在com.star.AuthFilter.doFilter（AuthFilter.java:42）at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:239）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在 org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:219）在 org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:106）在 org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:503）在 org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:136）在 org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:74）在 org.apache.catalina.valves.AbstractAccessLogValve.invoke（AbstractAccessLogValve.java:610）在 org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:88）在 org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:516）在 org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1015）在 org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:652）在 org.apache.coyote.http11.Http11NioProtocol $ Http11ConnectionHandler.process（Http11NioProtocol.java:222）在 org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1575）在 org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.run（NioEndpoint.java:1533）在 java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1142）在 java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:617）在java.lang.Thread.run（Thread.java:745）

我正在克隆素数展示example，但我没有把它弄好！

这是我的代码： xhtml文件：

<p:dataTable id="tbl" var="sim" value="#{simulationLog.simulation}"
                     paginatorTemplate="{CurrentPageReport}  {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink}"
                     paginator="true" rows="10" style="margin-bottom:20px"
                     filteredValue="#{simulationLog.filtredSimulation}"
                     >
            <p:column filterBy="#{sim.simId}" filterMatchMode="contains">
                <f:facet name="header">
                    <h:outputText value="Id" />
                </f:facet>
                <p:commandLink value="#{sim.simId}" />
            </p:column>

支持bean：

@ManagedBean
@SessionScoped
public class SimulationLog implements Serializable {
    .
    .
    .
    private List<SimulationLog> simulation;
    private List<SimulationLog> filtredSimulation;

    public List<SimulationLog> getSimulation() {
        return ParamsDAO.getSimulation(codeAgence);
    }

    public List<SimulationLog> getFiltredSimulation() {
        return filtredSimulation;
    }

    public void setFiltredSimulation(List<SimulationLog> filtredSimulation) {
        this.filtredSimulation = filtredSimulation;
    }
    .
    .
    .
}

Answer 1

我遇到了同样的错误，可以通过用<h:form>包装dataTable来修复它。

Answer 2

简而言之，我有以下内容并导致同样的错误：

<f:facet name="header">Date</f:facet>
<f:facet name="filter">
<h:outputText value="Year: " />
<p:selectOneMenu onchange="PF('myTable').filter();">
    <f:selectItem itemValue="" itemLabel="All" />
    <f:selectItems value="#{bean.conditionalYears}" var="yearSelect" itemValue="#{yearSelect.value}" itemLabel="#{yearSelect.label}" />
</p:selectOneMenu>
</f:facet>

我必须删除<f:facet name="filter" />以外的所有内容，<p:selectOneMenu />

除外

在我的情况下，<h:outputText />（不限于outputText）导致{em> FilterFeature：277 中的ClassCastException被UIData.visitTree(VisitContext, VisitCallback)吞没（不是有CATCH）

filterValue = ((ValueHolder) filterFacet).getLocalValue();

由于某些原因，filterFacet是UIPanel，而不是预期的SelectOneMenu。

所以答案是： 如果您使用的是<f:facet name="filter" />，请尝试删除自定义过滤器字段以外的所有内容。

Primefaces数据表过滤不起作用

2 个答案: