相关疑难解决方法(0)

我在JSF支持bean中有以下方法:

public List<Rent> getTopMemebers(){
    return rentDAO.findByMonthAndYear(MonthReport, YearReport);
}

我在数据表中显示:

<p:dataTable value="#{rentController.topMemebers}" var="item">
    <p:column>
        <h:outputText value="#{item.rentid}"/>
    </p:column>
    ...
</p:dataTable>

但我得到以下例外:

SEVERE: Error Rendering View[/admin/index.xhtml]
java.lang.NumberFormatException: For input string: "rentid"
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
        at java.lang.Integer.parseInt(Integer.java:449)
        at java.lang.Integer.parseInt(Integer.java:499)
        at javax.el.ArrayELResolver.toInteger(ArrayELResolver.java:375)
        at javax.el.ArrayELResolver.getValue(ArrayELResolver.java:195)
        at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:175)
        at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72)
        at com.sun.el.parser.AstValue.getValue(AstValue.java:116)
        at com.sun.el.parser.AstValue.getValue(AstValue.java:163)
        at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:219)
        at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:102)
        at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:190)
        at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:178)
        at javax.faces.component.UIOutput.getValue(UIOutput.java:168)
        at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:205)
        at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:338)
        at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:164)
        at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:878)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1620)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1616)
        at org.primefaces.component.datatable.DataTableRenderer.encodeRow(DataTableRenderer.java:489)
        at org.primefaces.component.datatable.DataTableRenderer.encodeTbody(DataTableRenderer.java:416)
        at org.primefaces.component.datatable.DataTableRenderer.encodeMarkup(DataTableRenderer.java:164)
        at org.primefaces.component.datatable.DataTableRenderer.encodeEnd(DataTableRenderer.java:80)
        at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:878)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1620) …