如何将 HTML 代码添加到 JSF FacesMessage [英] How do I add HTML code to JSF FacesMessage

问题描述

默认情况下，每个 JSF FacesMessage 都显示在一行中.我想在消息本身中添加一个 HTML 换行符 <br/> ，以便整齐地显示消息.我试过如下

By default, every JSF FacesMessage is presented in a single row. I would like to add a HTML line break <br /> to the message itself, so that the message is shown neatly. I tried it like below

message = new FacesMessage("test<br/>test");

然而，它被 JSF 转义并显示为文字文本.如何将 HTML 代码添加到 FacesMessage 而不被转义?

However, it got escaped by JSF and is shown as literal text. How can I add HTML code to a FacesMessage without it getting escaped?

推荐答案

理论上，您需要 h:messages 组件的 escape 属性，例如 h:outputText 有.您不是唯一想要这个的人，以前经常要求这样做，但根据 JSF 人员的说法，这是一个 WONTFIX.

In theory, you want an escape attribute for the h:messages component like the h:outputText has. You're not the only one who wants this, this is requested before more than often, but it's a WONTFIX according the JSF guys.

您有多种选择:

1. 使用 而不是
并相应地应用 CSS(最简单).

1. Use instead of <br> and apply CSS accordingly (easiest).

#messages td { white-space: pre; }

创建一个自定义渲染器 扩展了 MessageRenderer(有点难，但如果你想覆盖更多的 HTML 而不仅仅是换行符，那就太好了).

Create a custom renderer which extends MessageRenderer (bit harder, but nice if you want to cover more HTML than only linebreaks).

自己在 bean 中的某个 List 中收集消息并使用 <t:dataList>，或者当您已经在使用 Facelets 而不是 JSP 时，使用 <ui:repeat>.这样您就可以使用 <h:outputText escape="false"> 来显示各个消息.

Gather the messages yourself in some List in a bean and display them using <t:dataList>, or when you're already using Facelets instead of JSP, using <ui:repeat>. This way you can use <h:outputText escape="false"> to display the individual messages.

或者，当您已经使用 JSF 2.0 时，只需遍历 FacesContext#getMessageList() 自己.每个项目为您提供一个 FacesMessage back 这反过来又提供了几个 getter.然后，您可以在 <h:outputText escape"false"/> 中显示摘要.

Or, when you're already on JSF 2.0, just iterate over FacesContext#getMessageList() yourself. Each item gives you a FacesMessage back which in turn offers several getters. You could then display the summary in a <h:outputText escape"false" />.

<ul>
    <ui:repeat value="#{facesContext.messageList}" var="facesMessage">
        <li>
            <h:outputText value="#{facesMessage.summary}" escape="false" />
        </li>
    </ui:repeat>
</ul>

或者，当您使用 JSF 实用程序库 OmniFaces 时，请使用其 <o:messages> 组件 代替它支持 escape 属性.

Or, when you're using JSF utility library OmniFaces, use its <o:messages> component instead which has support for escape attribute.

<o:messages escape="false" />

这篇关于如何将 HTML 代码添加到 JSF FacesMessage的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！