Jsf java.lang.arithmetricException:/by zero与Primefaces LazyDataModel
到目前为止,我有一个JSF管理的bean,它带有Jsf java.lang.arithmetricException:/by zero与Primefaces LazyDataModel,jsf,primefaces,Jsf,Primefaces,到目前为止,我有一个JSF管理的bean,它带有LazyDataModel,如下所示 @Controller @Scope("request") public final class StateManagedBean extends LazyDataModel<StateTable> { @Autowired private StateService stateService; private final List<StateTable>list;
LazyDataModel
,如下所示
@Controller
@Scope("request")
public final class StateManagedBean extends LazyDataModel<StateTable>
{
@Autowired
private StateService stateService;
private final List<StateTable>list;
private List<StateTable> selectedValues;
private List<StateTable> filteredValues;
private Long id;
public StateManagedBean()
{
list=null;
stateService=null;
}
@Override
public List<StateTable> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, String> filters)
{
int rowCount = stateService.rowCount().intValue();
int currentPage = currentPage(first, pageSize);
if(rowCount<=currentPage*pageSize-pageSize)
{
first-=pageSize;
}
if(pageSize<=0)
{
FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_FATAL, "Error!", "The page size supplied is incorrect. The current operation has been rejected.");
FacesContext.getCurrentInstance().addMessage(null, message);
return Collections.emptyList();
}
if(filters!=null&&!filters.isEmpty())
{
List<StateTable> stateTables = stateService.getList(first, pageSize, sortOrder, sortField, filters);
setRowCount(stateTables.size());
return stateTables;
}
setRowCount(rowCount);
return stateService.getList(first, pageSize, sortOrder, sortField);
}
}
@Override
public void setRowIndex(int rowIndex)
{
if(rowIndex==-1||getPageSize()==0)
{
super.setRowIndex(-1);
}
else
{
super.setRowIndex(rowIndex%getPageSize());
}
}
通过这次修改,我得到了以下意外的异常
INFO: java.lang.ArithmeticException: / by zero
java.lang.ArithmeticException: / by zero
at org.primefaces.model.LazyDataModel.setRowIndex(LazyDataModel.java:62)
at org.primefaces.component.api.UIData.setRowModel(UIData.java:409)
at org.primefaces.component.api.UIData.setRowIndex(UIData.java:401)
at org.primefaces.component.api.UIData.processChildren(UIData.java:289)
at org.primefaces.component.api.UIData.processPhase(UIData.java:261)
at org.primefaces.component.api.UIData.processDecodes(UIData.java:227)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:506)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:931)
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:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
May 16, 2013 9:11:06 PM com.sun.faces.context.PartialViewContextImpl processPartial
INFO: java.lang.ArithmeticException: / by zero
java.lang.ArithmeticException: / by zero
at org.primefaces.model.LazyDataModel.setRowIndex(LazyDataModel.java:62)
at org.primefaces.component.api.UIData.setRowModel(UIData.java:409)
at org.primefaces.component.api.UIData.setRowIndex(UIData.java:401)
at org.primefaces.component.api.UIData.processChildren(UIData.java:289)
at org.primefaces.component.api.UIData.processPhase(UIData.java:261)
at org.primefaces.component.api.UIData.processValidators(UIData.java:241)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:508)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1170)
at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
May 16, 2013 9:11:06 PM com.sun.faces.context.PartialViewContextImpl processPartial
INFO: java.lang.ArithmeticException: / by zero
java.lang.ArithmeticException: / by zero
at org.primefaces.model.LazyDataModel.setRowIndex(LazyDataModel.java:62)
at org.primefaces.component.api.UIData.setRowModel(UIData.java:409)
at org.primefaces.component.api.UIData.setRowIndex(UIData.java:401)
at org.primefaces.component.api.UIData.processChildren(UIData.java:289)
at org.primefaces.component.api.UIData.processPhase(UIData.java:261)
at org.primefaces.component.api.UIData.processUpdates(UIData.java:253)
at org.primefaces.component.datatable.DataTable.processUpdates(DataTable.java:550)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:510)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:1229)
at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
只有当我重写托管bean中的setRowIndex()
方法时,异常才会消失,如下所示
@Controller
@Scope("request")
public final class StateManagedBean extends LazyDataModel<StateTable>
{
@Autowired
private StateService stateService;
private final List<StateTable>list;
private List<StateTable> selectedValues;
private List<StateTable> filteredValues;
private Long id;
public StateManagedBean()
{
list=null;
stateService=null;
}
@Override
public List<StateTable> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, String> filters)
{
int rowCount = stateService.rowCount().intValue();
int currentPage = currentPage(first, pageSize);
if(rowCount<=currentPage*pageSize-pageSize)
{
first-=pageSize;
}
if(pageSize<=0)
{
FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_FATAL, "Error!", "The page size supplied is incorrect. The current operation has been rejected.");
FacesContext.getCurrentInstance().addMessage(null, message);
return Collections.emptyList();
}
if(filters!=null&&!filters.isEmpty())
{
List<StateTable> stateTables = stateService.getList(first, pageSize, sortOrder, sortField, filters);
setRowCount(stateTables.size());
return stateTables;
}
setRowCount(rowCount);
return stateService.getList(first, pageSize, sortOrder, sortField);
}
}
@Override
public void setRowIndex(int rowIndex)
{
if(rowIndex==-1||getPageSize()==0)
{
super.setRowIndex(-1);
}
else
{
super.setRowIndex(rowIndex%getPageSize());
}
}
那么,这是Primefaces的问题吗?我使用的是Mojarra 2.1.9和Primefaces 3.5。这看起来确实是个问题。在这种情况下,以这种方式重写
setRowIndex()
方法是否足够?尝试添加setPageSize(pageSize)代码>内部加载方法。其结果如下:
@Override
public List<StateTable> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, String> filters)
{
int rowCount = stateService.rowCount().intValue();
int currentPage = currentPage(first, pageSize);
if(rowCount<=currentPage*pageSize-pageSize)
{
first-=pageSize;
}
if(pageSize<=0)
{
FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_FATAL, "Error!", "The page size supplied is incorrect. The current operation has been rejected.");
FacesContext.getCurrentInstance().addMessage(null, message);
return Collections.emptyList();
}
if(filters!=null&&!filters.isEmpty())
{
List<StateTable> stateTables = stateService.getList(first, pageSize, sortOrder, sortField, filters);
setRowCount(stateTables.size());
return stateTables;
}
setRowCount(rowCount);
setPageSize(pageSize); //add this line
return stateService.getList(first, pageSize, sortOrder, sortField);
}
@覆盖
公共列表加载(int-first、int-pageSize、字符串排序字段、排序器排序器、映射过滤器)
{
int rowCount=stateService.rowCount().intValue();
int currentPage=currentPage(第一,页面大小);
如果(RowCount)您是否尝试过显式调用LazModel.setPageSize()?我想这个问题在中有描述。不,我没有显式调用该方法。重写setRowIndex()解决了我的问题。谢谢!;-)谢谢,稍后会检查。