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こんにちはdataTable、Primefaces を使用して作成し、の名前列へのリンクを作成しましたdataTable。名前のリンクをクリックすると、次のページに移動し、選択した行の内容が次のページに表示されますが、次のエラーが表示されます。

javax.el.PropertyNotFoundException: /view.xhtml at line 50 and column 81 target="#{OrderBean.selectedOrder}": Target Unreachable, identifier 'OrderBean' resolved to null
  at org.apache.myfaces.view.facelets.el.TagValueExpression.setValue(TagValueExpression.java:121)   at org.apache.myfaces.view.facelets.tag.jsf.core.SetPropertyActionListenerHandler$SetPropertyListener.processAction(SetPropertyActionListenerHandler.java:110) at javax.faces.event.ActionEvent.processListener(ActionEvent.java:51)
        at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:344)
        at javax.faces.component.UICommand.broadcast(UICommand.java:103)
        at javax.faces.component.UIData.broadcast(UIData.java:761)
        at javax.faces.component.UIViewRoot._broadcastAll(UIViewRoot.java:973)
        at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:275)
        at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1285)
        at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:711)
        at org.apache.myfaces.lifecycle.InvokeApplicationExecutor.execute(InvokeApplicationExecutor.java:34)
        at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:171) 
   when i click on the link. Can anyone plz help me resolve this error out.check whether i made any mistake in the setpropertyaction Listener ??? 
  if so plz post the  correct code. I am waiting the answers please help me to clear the error using jas 2.0 and primefaces.

view.xhtml

<p:dataTable id="dataTable" var="v" value="#{order.orderList}"  paginator="true" rows="3" paginatorTemplate="{CurrentPageReport}  {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
               rowKey="#{order.year}" rowsPerPageTemplate="6,9">

    <f:facet name="header">  
       Data Table
    </f:facet>  

    <p:column>  
        <f:facet name="header">  
          <h:outputText value="Name" />

        </f:facet>
           <p:commandLink value="#{v.name}"  action="/nextpage.xhtml?faces-redirect=true" rowSelectListener="#{orderBean.onRowSelectNavigate}" > 
 <f:setPropertyActionListener value="#{v}" target="#{orderBean.selectedOrder}"/> 

</p:commandLink>


    </p:column>  

    <p:column>  
        <f:facet name="header">  
         <h:outputText value="Year" />
        </f:facet>  
        <h:outputText value="#{v.year}" />  
    </p:column>  
     ----------</p:datatable>

OrderBean.java

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;

import org.primefaces.event.SelectEvent;

@ManagedBean(name="order")
@SessionScoped
@ViewScoped

public class OrderBean implements Serializable{


    private static final long serialVersionUID = 1L;
    String name;
    int year;
    String company;
    String number;
    private Order selectedOrder;

    public Order getSelectedOrder() {
        return selectedOrder;
    }
    public void setSelectedOrder(Order selectedOrder) {
        this.selectedOrder = selectedOrder;
    }
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getYear() {
        return year;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public String getCompany() {
        return company;
    }

    public void setCompany(String company) {
        this.company = company;
    }

    public String getNumber() {
        return number;
    }

    public void setNumber(String number) {
        this.number = number;
    }

    private static final ArrayList<Order> orderList = 
        new ArrayList<Order>(Arrays.asList(

        new Order("vidhya",2020,"IT","1"),
        new Order("madhu",1021,"BT", "2"),
        new Order("manu",3846,"Mech","3"),
        new Order("shruthi",5647,"Benz","4")

    ));

    public ArrayList<Order> getOrderList() {

        return orderList;

    }

    public String addAction() {

        Order order = new Order(this.name, this.year, 
            this.company, this.number);

        orderList.add(order);

        return null;
    }



    public static class Order{

        String name;
        int year;
        String company;
        String number;



        public Order(String name, int year, 
                String company, String number) {
            this.name = name;
            this.year = year;
            this.company = company;
            this.number = number;
        }

        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public int getYear() {
            return year;
        }
        public void setYear(int year) {
            this.year = year;
        }
        public String getCompany() {
            return company;
        }
        public void setCompany(String company) {
            this.company = company;
        }
        public String getNumber() {
            return number;
        }
        public void setNumber(String number) {
            this.number = number;
        }

        public String moveToNextPage(){
            return "nextpage";
        }
        public String onRowSelectNavigate(SelectEvent event) {   
               FacesContext.getCurrentInstance().getExternalContext().getFlash().put("selectedOrder", event.getObject());   
               return "nextpage?faces-redirect=true";   
           }

nextpage.xhtml

<h:panelGrid id="display" columns="2" cellpadding="4" >  
        <f:facet name="header">  
        details 
        </f:facet> 
        <h:outputText value="Name:" />  
        <h:outputText value="#{orderBean.selectedOrder.name}" />  

        <h:outputText value="Year:" />  
        <h:outputText value="#{orderBean.selectedOrder.year}" />  

        <h:outputText value="Company:" />  
        <h:outputText value="#{orderBean.selectedOrder.company}" />  

        <h:outputText value="Number:" />  
        <h:outputText value="#{orderBean.selectedOrder.number}" />    
    </h:panelGrid>
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1 に答える 1

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で Bean に名前を付けたorderので@ManagedBean(name="order")、 でアクセスできます#{order}。に変更orderBeanしorderます。また、この EL であなたがミスをしたこともわかりました#{orderBean.onRowSelectNavigate}。

スー:

#{order.selectedOrder}

と

#{order.onRowSelectNavigate}

仕事をするべきです。

于 2013-03-06T08:05:24.097 に答える