數據表在JSF

Question

不選擇當我選擇在數據表中它不是在需要文本框中Fields.i顯示一排不知道是什麼問題

當我選擇在數據表中的行是不顯示在需要的文本框中Fields.i不知道是什麼問題

MY DATATABLE

<p:dataTable 
    var="op" 
    value="#{Bean.datamodel}" 
    paginator="true" 
    rows="10" 
    paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} {CurrentPageReport} {NextPageLink} {LastPageLink}" 
    rowsPerPageTemplate="2,5,10,15" 
    selectionMode="single" 
    lazy="true" 
    selection="#{Bean.dto}" 
    id="customerSearchTable" 
    emptyMessage="No Customers found with given criteria" 
    resizableColumns="true" 
    widgetVar="dataTab"> 
    <p:tooltip 
     for="customerSearchTable" 
     value="Select a customer to update the details" /> 
    <p:ajax 
     event="rowSelect" 
     update=":name:display" /> 
    <f:facet name="header"> 
     Letter of Promotion 
     </f:facet> 

    <p:column 
     headerText=" Id" 
     sortBy="#{op.id}" 
     width="100" 
     filterBy="#{op.id}" 
     filterMatchMode="contains"> 
     <h:outputText value="#{op.id}" /> 
    </p:column> 

    <p:column 
     headerText="Empno" 
     sortBy="#{op.empno}" 
     filterBy="#{op.empno}" 
     filterMatchMode="contains"> 
     <h:outputText value="#{op.empno}" /> 
    </p:column> 
    <p:column 
     headerText="De" 
     sortBy="#{op.de}" 
     filterBy="#{op.de}" 
     filterMatchMode="contains"> 
     <h:outputText value="#{op.de}" /> 
    </p:column> 
    <p:column 
     headerText="Empname" 
     sortBy="#{op.empname}" 
     filterBy="#{op.empname}" 
     filterMatchMode="contains"> 
     <h:outputText value="#{op.empname}" /> 
    </p:column> 

    <p:column 
     headerText="De" 
     sortBy="#{op.de}" 
     filterBy="#{op.de}" 
     filterMatchMode="contains"> 
     <h:outputText value="#{op.de}" /> 
    </p:column> 

    <p:column 
     headerText="Lo" 
     sortBy="#{op.lo}" 
     filterBy="#{op.lo}" 
     filterMatchMode="contains"> 
     <h:outputText value="#{op.lo}" /> 
    </p:column> 


    <f:facet name="footer"> 
     In total there are #{Bean.datamodel.rowCount} 
    </f:facet> 

數據模型

import java.io.Serializable; 
import java.util.List; 
import javax.faces.model.ListDataModel; 
import org.primefaces.model.SelectableDataModel; 

public class Datamodel extends ListDataModel<DTO> implements SelectableDataModel<DTO>, Serializable{ 

    /** 
    * 
    */ 
    private static final long serialVersionUID = 1L; 


    public Datamodel(List<DTO> list) { 
     super(list); 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    public DTO getRowData(String rowKey) { 
     // TODO Auto-generated method stub 
     @SuppressWarnings("unchecked") 
     List<DTO> points = (List<DTO>)getWrappedData(); 
     if (rowKey != null && rowKey.trim().length() != 0 && !rowKey.equalsIgnoreCase("null")) { 
      for (DTO point : points) { 
       if (point.getEmpname().equals(rowKey)) { 
        return point; 
       } 
      } 
     } 
     return null; 
    } 

    @Override 
    public Object getRowKey(DTO arg0) { 
     // TODO Auto-generated method stub 
     return null; 
    } 


} 

Answer 1

解決這個問題是在數據模型

public Object getRowKey(dto point) { 
      // TODO Auto-generated method stub 
      return point.getid(); 
     } 

在數據模型

public Datamodel() { 
      super(); 
      // TODO Auto-generated constructor stub 
     } 

返回值

空的構造