在h:selectManyCheckbox中预选项目 [英] Preselect items in h:selectManyCheckbox

问题描述

如何预选h:selectManyCheckbox组件中的元素?我已经搜索了f:selectItem标记的属性，但还没有找到如何预选择此项目的方法(即，在调用该网站时已将其选中).

How do I preselect the elements in a h:selectManyCheckbox component? I've searched through the properties of the f:selectItem tag but not yet have found how to pre-select this item (i.e. it is ticked already when the site is called).

推荐答案

h:selectManyCheckbox的value属性可以接受来自托管bean的字符串数组.您可以在初始化托管Bean时直接将默认值设置为此数组.

The value attribute of h:selectManyCheckbox can accept an array of string from the managed bean. You can directly set the default values to this array when the managed bean is initialized.

例如，在视图中:

<h:selectManyCheckbox value="#{MBean.choice}">
    <f:selectItem itemValue="A" itemLabel="Choice A" />
    <f:selectItem itemValue="B" itemLabel="Choice B" />
    <f:selectItem itemValue="C" itemLabel="Choice C"/>
    <f:selectItem itemValue="D" itemLabel="Choice D" />
</h:selectManyCheckbox>

然后在MBean中:

public class MBean{

    //Preselect the "Choice A" and "Choice C" 
    private String[] choice= {"A","C"};

    //Getter and setter of choice

}

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