Time for action – displaying FacesMessage using <p:messages>

Let us see how to display multiple FacesMessage using <p:messages>:

1. Create a form with two commandButton elements and the <p:messages/> component using the following code:

   <h:form style="width: 500px; padding-left: 10px;">
     <p:panel header="Messages with All Severity levels">
     <p:messages globalOnly="true" autoUpdate="true"/>
     <p:commandButton value="Show FacesMessages" actionListener="#{messagesController.addMultipleMsgs}"/>
     </p:panel>
   </h:form>

2. Add FacesMessage in the actionListener method as follows:

   public void addMultipleMsgs()
   {
     FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO,"Sample Info Msg", null));
     FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_WARN,"Sample Warn Msg", null));
     FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR...