从 bean 遍历数据表 [英] Iterating through the datatable from the bean

问题描述

我有以下数据表:

   <h:form> 
<h:dataTable id = "notTable" value="#{editCategoryBean.allNotifications}" var="notification">
     <h:column>                 
        <f:facet name="header">Key</f:facet>                    
        <h:inputText id = "notkey" value="#{notification.key}" />
     </h:column>
     <h:column>
        <f:facet name="header">Lang</f:facet>
        <h:inputText id = "notlanguage" value="#{notification.language}"/>
     </h:column>
     <h:column>
        <f:facet name="header">Value</f:facet>
        <h:inputText id = "notvalue" value="#{notification.value}"/>      
     </h:column>
   </h:dataTable>
<h:commandButton action ="#{editCategoryBean.save()}"  value = "Save" >    </h:commandButton>

我想从数据表中的 allNotifications 列表中编辑我的通知，并一键保存所有更改.如何从 editCategoryBean 遍历数据表?或者我如何才能实现这种行为?

I want to edit my notifications from the allNotifications List in the datatable and save all changes with one button click. How can I iterate through the datatable from the editCategoryBean? Or how can I implement this behaviour otherwise?

推荐答案

JSF 已经以通常的方式使用提交的值更新了 value="#{editCategoryBean.allNotifications}" 背后的模型.所以，你基本上需要做的就是将它传递给服务层进行保存:

JSF has already updated the model behind value="#{editCategoryBean.allNotifications}" with the submitted values the usual way. So, all you basically need to do is to pass it through to the service layer for save:

public void save() {
    yourNotificationService.save(allNotifications);
}

否则，如果您出于某种原因确实坚持自己迭代它，也许打印提交的值用于测试目的，那么只需按照通常的 Java 方式进行:

Otherwise, if you really insist in iterating over it yourself for some reason, maybe to print the submitted values for testing purposes, then just do it the usual Java way:

public void save() {
    for (Notification notification : allNotifications) {
        System.out.println(notification.getKey());
        System.out.println(notification.getLanguage());
        System.out.println(notification.getValue());
    }
}

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