Question

我需要根据'pickuphour'中选择的值更新'pickupdate'。

我的问题是，当调用更新侦听器时，侦听器方法中没有新选择的“pickuphour”值。

在转换器更新我的bean“pickuptime”值之前，似乎会调用侦听器。

（我在这里使用了DatePartConverter：Binding more than one input field to a backing bean property by using Java Server Faces?）

如何在侦听器方法之前或之后获取新选择的小时值？

<h:panelGroup>
                <h:form id="pickuptime">
                    <p:selectOneMenu id="pickupdate" widgetVar="pickupdate" value="#{journeyCRUD.pickuptime}" immediate="true"> 
                            <f:selectItem itemLabel="Today" itemValue="#{journeyCRUD.dateList[0]}" noSelectionOption="true"/>  
                            <f:selectItem itemLabel="Tomorrow" itemValue="#{journeyCRUD.dateList[1]}" /> 
                            <f:selectItems value="#{util:subList(journeyCRUD.dateList, 2, 30)}" var="date" itemValue="#{date}" itemLabel="#{util:formatDate(date, 'EEE dd MMM yyyy','EEE dd MMM')}"/>
                            <f:converter converterId="datePartConverter"/>
                            <f:attribute name="part" value="date"/>
                            <f:ajax execute="@this pickuphour pickupmin"/>
                    </p:selectOneMenu> 
                    <p:selectOneMenu id="pickuphour" widgetVar="pickuphour" value="#{journeyCRUD.pickuptime}" immediate="true" >
                            <f:selectItems value="#{journeyCRUD.hourList}"/> 
                            <f:converter converterId="datePartConverter"/>
                            <f:attribute name="part" value="hour"/>
                            <f:ajax event="change" listener="#{journeyCRUD.updatePickupDate}" execute="@this pickupmin"  render="pickupdate" immediate="true"/>
                    </p:selectOneMenu> 
                    <p:selectOneMenu id="pickupmin" widgetVar="pickupmin" value="#{journeyCRUD.pickuptime}" immediate="true">  
                            <f:selectItems value="#{journeyCRUD.minuteList}"/> 
                            <f:converter converterId="datePartConverter"/>
                            <f:attribute name="part" value="minutes"/>
                    </p:selectOneMenu> 
                    </h:form>
                </h:panelGroup>

Answer 1

此转换器仅在设置了所有值后返回更新的模型值。如果你想继续使用这个转换器，最好的办法是直接从<f:ajax listener>参数可用的组件中提取它。

public updatePickupDate(AjaxBehaviorEvent event) {
    UIInput component = (UIInput) event.getComponent();
    Object value = Component.getValue();
    // ...
}

多个字段上的Ajax侦听器和转换器 - 未传递给侦听器的新值

1 个答案: