JSF：commandLink作为outputFormat的参数 [英] JSFs: commandLink as a parameter for outputFormat

问题描述

我正在将一些JSF文件国际化，因此我正在外化字符串（以及使用占位符连接字符串）。我对JSF（今天和昨天）的经验很少，如果对我的问题有一个明显的答案，请原谅我！

I'm in the process of internationalising some JSF files so am externalising strings (and the concatenation of strings using placeholders). I have very little experience with JSF (today and yesterday) so excuse me if there is an obviuos answer to my question!

我一直在使用h：outputFormat标签（成功用于简单占位符的f：param标签，但现在我想用commandLink组件替换占位符。

I have been using the h:outputFormat tag (and the f:param tag) successfully for simple placeholders but now I'm looking to replace a placeholder with a commandLink component.

ie

<h:outputFormat value="#{adminMsgs.scheduleUpdateLink} ">
    <h:commandLink value="#{adminMsgs.update}" action="refresh" />
</h:outputFormat>

属性文件：

scheduleUpdateLink = After waiting a few seconds, please {0} the page.
update = update

并按以下方式输出：

After waiting a few seconds, please <a href="#" class="..." onclick="...;return false;">update</a> the page.

此无法工作（更新链接出现在'scheduleUpdateLink之前'text），有谁知道我怎么做？

This doesn't work (the update link appears before the 'scheduleUpdateLink' text), does anyone know how I might do it?

提前致谢。

编辑/更新

感谢您的回复McDowell - 非常有用，但仍未完全解决我的问题。我还需要对输入框（h：inputText）执行相同的操作，并且可能还存在一个资源字符串中有多个占位符的情况。因此，我无法保证阿拉伯语中的顺序是相同的。

Thanks for your reply McDowell - very useful, but still haven't completely solved my problem. I will also be needing to do the same with input boxes (h:inputText), and there may also be instances where there are multiple placeholders in one resource string. Hence I cannot guarantee the order in, say, Arabic, will be the same.

如果我使用Java函数;你知道我是否有办法以字符串形式传递JSF标签，例如： < h：outputFormat value = .. 。并使用faces上下文来获取呈现的HTML，然后我可以将其插入到各自的占位符中并以纯HTML格式返回？或者沿着这些方向的任何其他想法？

If I went with a Java function; do you know if there is a way I can pass, as a string, the JSF tags, e.g. <h:outputFormat value=... and use the faces context to obtain the rendered HTML which I can then insert into respective placeholders and return as plain HTML? Or any other ideas along these lines?

干杯。

推荐答案

h：outputFormat 标记将（据我所知）只使用 f：param 子项作为参数。

The h:outputFormat tag will (as far as I know) only use f:param children as parameters.

如果消息是链接（而不是 h：commandLink ），您可以使用HTML文字：

If the message was a link (instead of a h:commandLink), you could use HTML literals:

<h:outputFormat escape="false" 
    value="...seconds, please &lt;a href='etc..." />.

我不建议尝试通过这样做来模拟h：commandLink。有可能在第三方库中找到更丰富的h：commandLink版本希望。

I would not recommend trying to emulate h:commandLink by doing this. It might be possible to find a richer version of h:commandLink in a third party library that does exactly what you want.

将字符串分成两部分是可能的，但是翻译人员的生活很困难，翻译质量可能会受到影响（特别是如果你这么做的话） 。

Just splitting the string into two is possible, but makes life difficult for translators and the quality of translation may suffer (especially if you're doing this a lot).

我会考虑使用这样的自定义函数：

I'd look at using a custom function like this:

<f:loadBundle basename="i18n.I18n" var="bundle" />
<h:outputText value="#{i18n:fragment(bundle.scheduleUpdateLink, 0)}" />
<h:commandLink>
  <h:outputText value="#{bundle.update}" />
</h:commandLink>
<h:outputText value="#{i18n:fragment(bundle.scheduleUpdateLink, 1)}" />

呈现的输出格式为：

After waiting a few seconds, please <script type="text/javascript"><!--
    /*JavaScript elided*/
//-->
</script><a href="#"
      onclick="return oamSubmitForm('someClientId');">update</a> the page.

该函数由一个静态方法支持，该方法拆分字符串并返回请求的片段：

The function is backed by a static method that splits the string and returns the requested fragment:

public static String fragment(String string, int index) {
  // TODO: regex probably not complete; ask stackoverflow!
  // see http://java.sun.com/javase/6/docs/api/java/text/MessageFormat.html
  final String regex = "\\{\\d.*?\\}";
  String[] fragments = string.split(regex, index + 2);
  return fragments[index];
  // TODO: error handling
}

取决于您的视图技术（ Facelets或JSP），函数声明略有不同：

Depending on your view technology (Facelets or JSP), the function declaration is slightly different:

• Facelets标记库文档


• 关于JSP标记库的Java EE 5教程

• Facelets tag library documentation
• Java EE 5 tutorial on JSP tag libraries

编辑：基于更多信息

JSF采用声明式构建接口的方法。您想要一个动态UI，其子项按照它们在翻译字符串中出现的顺序排序。这两件事情不一致，但并没有丢失。

JSF takes a declarative approach to building interfaces. You want a dynamic UI with children ordered according to the order they appear in a translated string. These two things are at odds, but all is not lost.

有几种方法可以解决这个问题。

There are a few ways to approach this.

• 重新设计UI以使用上面的文本，下面的输入/控制表（流行的表单方法）。这是最简单的解决方案，但可能无法让您的UI设计师满意。


• 使用面板上的绑定属性，用于创建和编程排序所有内容。这可能意味着你的支持bean中有很多重复的代码。


• 编写一个可重用的自定义控件，它可能如下所示：

• Redesign the UI to use text above, input/control table below (the popular form approach). This is the simplest solution, but might not make your UI designer happy.
• Use the binding attribute on a panel to create and programmatically order everything. This might mean a lot of repetitive code in your backing beans.
• Write a reusable custom control which might look like this:

。

<ed:formatPane string="click {0} after filling in forename {1} and surname {2}">
   <h:commandLink value="#{bundle.linkMsg}" />
   <h:inputText value="#{bean.prop1}" />
   <h:inputText value="#{bean.prop2}" />
</ed:formatPane>

为h：outputFormat替换渲染器可能是（并且工作量少）可以支持任意孩子而不是创建一个完整的自定义控件，但我反对它，因为它可能会导致长期维护期间的混乱。

It is probably possible (and less work) to just replace the renderer for h:outputFormat to support arbitrary children instead of creating a full custom control, but I'd argue against it because it may lead to confusion during long-term maintenance.

有人可能已经编写了一个自定义控制做我的建议（它几乎不是一个原创的想法）。

Someone may have already written a custom control that does what I suggest (it can hardly be an original idea).

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