jsf ajax以参数方式传值

Question

    <p:dataList value="#{statisticsBean.groupbys}" var="oneMenu">
        <p:selectOneMenu style="width:150px" var="selectvalue">
            <p:ajax update=":form1:groupByID" listener="#{statisticsBean.groupbysChange(oneMenu, selectvalue)}">
                <f:param name="test" value="$(this).val()"></f:param>
            </p:ajax>
            <f:selectItems value="#{oneMenu}" var="gb"/>
        </p:selectOneMenu>
    </p:dataList>

Answer 1

  <p:dataList value="#{statisticsBean.groupbys}" var="oneMenu" rowIndexVar="rowindex" type="definition">
            <p:selectOneMenu value="#{statisticsBean.groupByValues[rowindex]}" id="groupBy#{rowindex}" style="width:150px;">
                <f:selectItems value="#{oneMenu}"></f:selectItems>
                <p:ajax process="@this" event="change" update=":form1:groupByID" listener="#{statisticsBean.groupbysChange(rowindex)}"></p:ajax>
            </p:selectOneMenu>
        </p:dataList>