在包含两个 p:dataTables 的页面上排序会导致 NullpointerException
Sorting on a page with two p:dataTables results in NullpointerException
我有一个 JSF 页面，通常显示我创建的 dataTable，在某些情况下会显示两个这样的 table：
<ui:define name="content">
<f:metadata>
<f:viewParam name="viewMode" value="#{backendBean.viewMode}"/>
<f:viewAction action="#{backendBean.init}" />
</f:metadata>
<h:form id="frmTables" styleClass="frmTablesStyle">
<customTableClass:customTable
viewModeName = "#{backendBean.viewMode.name()}"
data= "#{backendBean.dataAttribute}" />
<c:if test="#{backendBean.viewMode.name() == 'FOREIGN'}">
<arbeitsauftrag:arbeitsauftragUebersichtTabelle
viewModeName = "FOREIGN"
data= "#{backendBean.otherDataAttribute}" />
</c:if>
</h:form>
</ui:define>
tables 工作正常，但是，当我同时显示两个 tables 并尝试对第一个 table 进行排序时，我得到了这个堆栈跟踪的 nullpointerexception :
Sep 01, 2021 9:53:43 AM com.sun.faces.context.PartialViewContextImpl processPartial
INFO: java.lang.NullPointerException
java.lang.NullPointerException
at org.primefaces.component.datatable.feature.SortFeature.decode(SortFeature.java:81)
at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:71)
at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:832)
at org.primefaces.component.api.UIData.processDecodes(UIData.java:281)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:573)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:835)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UINamingContainer.visitTree(UINamingContainer.java:174)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:266)
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:57)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:219)
at org.omnifaces.context.OmniPartialViewContext.processPartial(OmniPartialViewContext.java:143)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:927)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:650)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.FacesExceptionFilter.doFilter(FacesExceptionFilter.java:93)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:103)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CacheControlFilter.doFilter(CacheControlFilter.java:238)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:237)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:209)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at at.akooe.filter.Log4jFilter.doFilter(Log4jFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:123)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.GzipResponseFilter.doFilter(GzipResponseFilter.java:180)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2536)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2525)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Sep 01, 2021 9:53:43 AM com.sun.faces.lifecycle.ApplyRequestValuesPhase execute
WARNING: java.lang.NullPointerException
javax.faces.FacesException: java.lang.NullPointerException
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:273)
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:57)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:219)
at org.omnifaces.context.OmniPartialViewContext.processPartial(OmniPartialViewContext.java:143)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:927)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:650)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.FacesExceptionFilter.doFilter(FacesExceptionFilter.java:93)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:103)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CacheControlFilter.doFilter(CacheControlFilter.java:238)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:237)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:209)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at at.akooe.filter.Log4jFilter.doFilter(Log4jFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:123)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.GzipResponseFilter.doFilter(GzipResponseFilter.java:180)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2536)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2525)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at org.primefaces.component.datatable.feature.SortFeature.decode(SortFeature.java:81)
at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:71)
at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:832)
at org.primefaces.component.api.UIData.processDecodes(UIData.java:281)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:573)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:835)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UINamingContainer.visitTree(UINamingContainer.java:174)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:266)
... 55 more
Sep 01, 2021 9:53:43 AM org.omnifaces.exceptionhandler.FullAjaxExceptionHandler logException
SEVERE: FullAjaxExceptionHandler: An exception occurred during processing JSF ajax request. Error page '/error/error.xhtml' will be shown.
java.lang.NullPointerException
at org.primefaces.component.datatable.feature.SortFeature.decode(SortFeature.java:81)
at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:71)
at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:832)
at org.primefaces.component.api.UIData.processDecodes(UIData.java:281)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:573)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:835)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UINamingContainer.visitTree(UINamingContainer.java:174)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:266)
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:57)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:219)
at org.omnifaces.context.OmniPartialViewContext.processPartial(OmniPartialViewContext.java:143)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:927)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:650)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.FacesExceptionFilter.doFilter(FacesExceptionFilter.java:93)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:103)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CacheControlFilter.doFilter(CacheControlFilter.java:238)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:237)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:209)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at at.akooe.filter.Log4jFilter.doFilter(Log4jFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:123)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.GzipResponseFilter.doFilter(GzipResponseFilter.java:180)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2536)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2525)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
这是来自支持 bean 的相关代码：
@ManagedProperty(value = "#{entityRepository}")
@Getter @Setter private EntityRepository entityRepository;
@Getter @Setter private LazyDataModel<Data> dataAttribute;
@Getter @Setter private LazyDataModel<Data> otherDataAttribute;
public void init() {
data= new LazyDataModel<Data>() {
private static final long serialVersionUID = 1L;
@Override
public List<data> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, Object> filters) {
CustomFilter filterParameter = createFilter(filters);
setRowCount(entityRepository.getCount(filterParameter));
return entityRepository.getDataOverview(filterParameter, (first / pageSize) + 1, pageSize, sortField, sortOrder);
}
@Override
public Object getRowKey(Data data) {
return data.getId();
}
@Override
public data getRowData(String rowKey) {
return entityRepository.getDataById(Long.parseLong(rowKey));
}
};
if (viewMode == ViewMode.FOREIGN) {
otherDataAttribute = new LazyDataModel<Data>() {
private static final long serialVersionUID = 2L;
@Override
public List<data> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, Object> filters) {
CustomFilter filterParameter = createFilter(filters);
setRowCount(entityRepository.getCount(filterParameter));
return entityRepository.getDataOverview(filterParameter, (first / pageSize) + 1, pageSize, sortField, sortOrder);
}
@Override
public Object getRowKey(Data data) {
return data.getId();
}
@Override
public Data getRowData(String rowKey) {
return entityRepository.getArbeitsauftragById(Long.parseLong(rowKey));
}
};
}
}
public CustomFilter createFilter(Map<String, Object> filters) {
//...Create Filterobject
}
总是第一个 table 显示排序失败，第二个 table 总是正常。此外，在抛出 nullpointerexception 之前不会调用 load() 方法。这是怎么回事？
确保为每个 table 提供唯一的 id 和 widgetVar，这样每个 javascript 运行 之间就不会发生冲突 table.
我有一个 JSF 页面，通常显示我创建的 dataTable，在某些情况下会显示两个这样的 table：
<ui:define name="content">
<f:metadata>
<f:viewParam name="viewMode" value="#{backendBean.viewMode}"/>
<f:viewAction action="#{backendBean.init}" />
</f:metadata>
<h:form id="frmTables" styleClass="frmTablesStyle">
<customTableClass:customTable
viewModeName = "#{backendBean.viewMode.name()}"
data= "#{backendBean.dataAttribute}" />
<c:if test="#{backendBean.viewMode.name() == 'FOREIGN'}">
<arbeitsauftrag:arbeitsauftragUebersichtTabelle
viewModeName = "FOREIGN"
data= "#{backendBean.otherDataAttribute}" />
</c:if>
</h:form>
</ui:define>
tables 工作正常，但是，当我同时显示两个 tables 并尝试对第一个 table 进行排序时，我得到了这个堆栈跟踪的 nullpointerexception :
Sep 01, 2021 9:53:43 AM com.sun.faces.context.PartialViewContextImpl processPartial
INFO: java.lang.NullPointerException
java.lang.NullPointerException
at org.primefaces.component.datatable.feature.SortFeature.decode(SortFeature.java:81)
at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:71)
at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:832)
at org.primefaces.component.api.UIData.processDecodes(UIData.java:281)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:573)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:835)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UINamingContainer.visitTree(UINamingContainer.java:174)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:266)
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:57)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:219)
at org.omnifaces.context.OmniPartialViewContext.processPartial(OmniPartialViewContext.java:143)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:927)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:650)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.FacesExceptionFilter.doFilter(FacesExceptionFilter.java:93)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:103)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CacheControlFilter.doFilter(CacheControlFilter.java:238)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:237)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:209)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at at.akooe.filter.Log4jFilter.doFilter(Log4jFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:123)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.GzipResponseFilter.doFilter(GzipResponseFilter.java:180)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2536)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2525)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Sep 01, 2021 9:53:43 AM com.sun.faces.lifecycle.ApplyRequestValuesPhase execute
WARNING: java.lang.NullPointerException
javax.faces.FacesException: java.lang.NullPointerException
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:273)
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:57)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:219)
at org.omnifaces.context.OmniPartialViewContext.processPartial(OmniPartialViewContext.java:143)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:927)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:650)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.FacesExceptionFilter.doFilter(FacesExceptionFilter.java:93)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:103)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CacheControlFilter.doFilter(CacheControlFilter.java:238)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:237)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:209)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at at.akooe.filter.Log4jFilter.doFilter(Log4jFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:123)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.GzipResponseFilter.doFilter(GzipResponseFilter.java:180)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2536)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2525)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at org.primefaces.component.datatable.feature.SortFeature.decode(SortFeature.java:81)
at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:71)
at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:832)
at org.primefaces.component.api.UIData.processDecodes(UIData.java:281)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:573)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:835)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UINamingContainer.visitTree(UINamingContainer.java:174)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:266)
... 55 more
Sep 01, 2021 9:53:43 AM org.omnifaces.exceptionhandler.FullAjaxExceptionHandler logException
SEVERE: FullAjaxExceptionHandler: An exception occurred during processing JSF ajax request. Error page '/error/error.xhtml' will be shown.
java.lang.NullPointerException
at org.primefaces.component.datatable.feature.SortFeature.decode(SortFeature.java:81)
at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:71)
at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:832)
at org.primefaces.component.api.UIData.processDecodes(UIData.java:281)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:573)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:835)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UINamingContainer.visitTree(UINamingContainer.java:174)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:266)
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:57)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:219)
at org.omnifaces.context.OmniPartialViewContext.processPartial(OmniPartialViewContext.java:143)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:927)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:650)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.FacesExceptionFilter.doFilter(FacesExceptionFilter.java:93)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:103)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CacheControlFilter.doFilter(CacheControlFilter.java:238)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:237)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:209)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at at.akooe.filter.Log4jFilter.doFilter(Log4jFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:123)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.omnifaces.filter.GzipResponseFilter.doFilter(GzipResponseFilter.java:180)
at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2536)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2525)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
这是来自支持 bean 的相关代码：
@ManagedProperty(value = "#{entityRepository}")
@Getter @Setter private EntityRepository entityRepository;
@Getter @Setter private LazyDataModel<Data> dataAttribute;
@Getter @Setter private LazyDataModel<Data> otherDataAttribute;
public void init() {
data= new LazyDataModel<Data>() {
private static final long serialVersionUID = 1L;
@Override
public List<data> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, Object> filters) {
CustomFilter filterParameter = createFilter(filters);
setRowCount(entityRepository.getCount(filterParameter));
return entityRepository.getDataOverview(filterParameter, (first / pageSize) + 1, pageSize, sortField, sortOrder);
}
@Override
public Object getRowKey(Data data) {
return data.getId();
}
@Override
public data getRowData(String rowKey) {
return entityRepository.getDataById(Long.parseLong(rowKey));
}
};
if (viewMode == ViewMode.FOREIGN) {
otherDataAttribute = new LazyDataModel<Data>() {
private static final long serialVersionUID = 2L;
@Override
public List<data> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, Object> filters) {
CustomFilter filterParameter = createFilter(filters);
setRowCount(entityRepository.getCount(filterParameter));
return entityRepository.getDataOverview(filterParameter, (first / pageSize) + 1, pageSize, sortField, sortOrder);
}
@Override
public Object getRowKey(Data data) {
return data.getId();
}
@Override
public Data getRowData(String rowKey) {
return entityRepository.getArbeitsauftragById(Long.parseLong(rowKey));
}
};
}
}
public CustomFilter createFilter(Map<String, Object> filters) {
//...Create Filterobject
}
总是第一个 table 显示排序失败，第二个 table 总是正常。此外，在抛出 nullpointerexception 之前不会调用 load() 方法。这是怎么回事？
确保为每个 table 提供唯一的 id 和 widgetVar，这样每个 javascript 运行 之间就不会发生冲突 table.