java.lang.ArithmeticException: / Primefaces LazyDataModel 为零

【问题标题】：java.lang.ArithmeticException: / by zero with Primefaces LazyDataModeljava.lang.ArithmeticException: / Primefaces LazyDataModel 为零
【发布时间】：2013-05-16 15:48:54
【问题描述】：

到目前为止，我有一个带有 LazyDataModel 的 JSF 托管 bean，看起来像下面这样。

@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);
    }
}

使用其他一些方法可以执行一些非常基本的数据库操作，这些操作运行良好。

由于我需要为这个托管 bean 提供一些查询字符串参数，我对其进行了修改，仅删除了 @Controller、@ManagedBean、@RequestScoped 和 @Autowired 等注释（它与 Spring 3.2 集成.2)。

然后在faces-config.xml 文件中配置此 JSF 托管 bean，例如，

<application>
    <el-resolver>
        org.springframework.web.jsf.el.SpringBeanFacesELResolver
    </el-resolver>
</application>

<managed-bean>
    <managed-bean-name>stateManagedBean</managed-bean-name>
    <managed-bean-class>admin.mangedbean.StateManagedBean</managed-bean-class>
    <managed-bean-scope>request</managed-bean-scope>

    <managed-property>
        <property-name>stateService</property-name>
        <value>#{stateService}</value>
    </managed-property>

    <managed-property>
        <property-name>id</property-name>
        <value>#{param.id}</value>
        <property-class>java.lang.Long</property-class>
    </managed-property>
</managed-bean>

通过这个修改，我得到了以下意外异常。

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)

只有当我像下面这样覆盖托管 bean 中的 setRowIndex() 方法时，异常才会消失。

@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？我正在使用 Mojarra 2.1.9 和 Primefaces 3.5。看起来真的是一个问题here。在这种情况下，以这种方式覆盖setRowIndex()方法是否足够？

【问题讨论】：

标签： jsf primefaces


【解决方案1】：

尝试在加载方法中添加setPageSize(pageSize);。结果是这样的：

@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);
}

【讨论】：

  • 谢谢，稍后查看。
猜你喜欢
  • 2012-03-08
  • 1970-01-01
  • 2019-03-10
  • 1970-01-01
  • 1970-01-01
  • 1970-01-01
  • 1970-01-01
  • 2014-06-15
  • 2012-06-04
相关资源
最近更新 更多
热门标签
Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode