如何将 ArrayList/lists/iterables 参数传递给 JSF1.2 自定义组件

发布于 2024-11-02 02:51:47 字数 381 浏览 5 评论 0原文

我正在尝试显示来自我的支持 bean 的图像列表它有一个函数

public getImgList(){
    return ArrayList<string>imgPathList;
}

现在这个列表必须呈现为等效的输出并排显示的图像。就像

[image][image][image]

如果我使用是不可能的，因为它将每行渲染所有一个，我找不到任何可以渲染它们的方法使用自定义组件，因为我必须将图像列表传递给自定义组件。谁能解释一下如何将列表传递给 JSF 1.2 Mojarra 中的自定义组件？

原文

I am trying to show a list of images from my backing bean
which has a function

public getImgList(){
    return ArrayList<string>imgPathList;
}

Now this List has to be rendered to a equivalent output of
images which are displayed side by side.
like

[image][image][image]

Which is not possible if I use <h:datatable>, because it will render all of them one per row,
And I cant find any method by which I can render them
using custom component as I will have to pass the list of images to the
custom components.
Can anyone please explain how to pass a list to a custom component in JSF 1.2 Mojarra?

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屋檐 2024-11-09 02:51:47

只需将其指定为属性即可。

<my:component value="#{bean.imagePaths}" />

在 UIComponent#getValueExpression()。

鉴于您已经在问这个简单的问题，我认为开发自定义组件将花费您很多时间。另外，由于已经存在很多解决方案，因此您基本上是在重新发明轮子。我建议采取不同的路线，即仅使用现有的标签/组件。有两个选项：

使用 JSTL 。如果您不将其放入另一个迭代组件（如）并且不在循环中渲染输入元素，则此方法将起作用。
```
    
```
使用第 3 方组件库，它提供了一个完全有价值的 JSF 迭代组件，该组件不呈现任何 HTML。我建议 Tomahawk 的 < /代码>.

Just specify it as attribute.

<my:component value="#{bean.imagePaths}" />

It'll just be available as exactly the same type in the value property of your custom component class with help of UIComponent#getValueExpression().

Given the fact that you're already asking this trivial question, I think developing the custom component is going to take a lot of time for you. Also, since a lot of solutions already exist, you're basically reinventing the wheel here. I'd suggest to take a different route, namely just using existing tags/components. There are two options:

Use JSTL <c:forEach>. This will work if you don't put it inside another iterating component like <h:dataTable> and you aren't rendering input elements in the loop.
```
<c:forEach items="#{bean.imagePaths}" var="imagePath">
    <img src="#{imagePath}" />
</c:forEach>
```
Use a 3rd party component library which offers a fullworthy JSF iterating component which doesn't render any HTML. I'd suggest Tomahawk's <t:dataList>.
```
<t:dataList value="#{bean.imagePaths}" var="imagePath">
    <img src="#{imagePath}" />
</t:dataList>
```