jsf-2 - Primefaces 数据表过滤不起作用

Question

这个问题在这里已经有了答案:





java.lang.NullPointerException at org.primefaces.component.datatable.feature.FilterFeature.filter

(1 个回答)


5年前关闭。




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

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

我正在克隆primefaces展示 example但我没说对!

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

我有同样的错误，可以通过用 <h:form> 包裹数据表来修复它.