如何显示< h:selectOneMenu>的选定值的标签在< h:outputText>中? [英] How to display the label of a selected value of a <h:selectOneMenu> in a <h:outputText>?

问题描述

我想在<h:outputText />中显示所选值<h:selectOneMenu />的标签.

I want to show the label of the selected value of <h:selectOneMenu /> in a <h:outputText />.

我在下面的下拉列表中获得了选定的值.

I have the following dropdown where I get the selected value.

<h:column>
    <h:selectOneMenu value="#{bean.selectedCity}">
        <f:selectItem itemValue="1" itemLabel="NewYork"/>
        <f:selectItem itemValue="2" itemLabel="Washington"/>
    </h:selectOneMenu>
</h:column>

我想显示选择的值，但是以下仅显示1或2.

I want to display the selected value, but the following only shows 1 or 2.

<h:outputText value="#{bean.selectedCity}" />

我要显示标签NewYork或Washington.我该怎么办?

I want to display the label NewYork or Washington. How can I do this?

推荐答案

更新#2 基于新的修改和评论:啊，我们最终到达了某个地方(我删除了完整的旧答案，如果您仍然想查看，请检查编辑历史记录.

Update #2 based on the new edits and comments: ah we finally get somewhere (I removed the entire old answer, check edit history if you want to see it anyway).

您只需要在模型中的某处维护一个Map<Long, String> cities之类的东西，然后按以下方式使用它即可:

You just need to maintain something like a Map<Long, String> cities somewhere in your model and then use it as follows:

<h:outputText value="#{bean.cities[bean.selectedCity]}" />

这将基本上显示bean.getCities().get(bean.getSelectedCity());.您甚至可以将地图重新​​用于<f:selectItems>，这样就无需在两个位置进行维护.

This will basically display bean.getCities().get(bean.getSelectedCity());. You could even reuse the map for <f:selectItems> so that you don't need to maintain it in two places.

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