How do I add HTML code to JSF FacesMessage
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
messa开发者_JS百科ge = new FacesMessage("test<br/>test");
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?
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.
You have several options:
Use
\ninstead of<br>and apply CSS accordingly (easiest).#messages td { white-space: pre; }Create a custom renderer which extends
MessageRenderer(bit harder, but nice if you want to cover more HTML than only linebreaks).Gather the messages yourself in some
Listin 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.Or, when you're already on JSF 2.0, just iterate over
FacesContext#getMessageList()yourself. Each item gives you aFacesMessageback 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>Or, when you're using JSF utility library OmniFaces, use its
<o:messages>component instead which has support forescapeattribute.<o:messages escape="false" />
Primefaces 5.3 support HTML on FacesMessages, just setting escape="false" at messages component:
<p:messages escape="false"/>
The p:growl supports this too btw.
I followed this blog.
StringBuilder sb = new StringBuilder("<html><body>");
sb.append("<p>A list of messages are:</p>");
for(String str : listMessages){
sb.append("Message: ").append(str).append("<br/>");
}
sb.append("</body></html>");
FacesMessage message = new FacesMessage(sb.toString());
message.setSeverity(FacesMessage.SEVERITY_INFO);
FacesContext.getCurrentInstance().addMessage("", message);
The key is not to miss the <html> and <body> tags and closing them properly like a valid HTML. Otherwise HTML tags appear as text on the dialog.
Use a CSS class to format the message, as BalusC told you in your previous question:
Showing the JSF Error Messages
加载中,请稍侯......
精彩评论