exemplo jsf

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:p="http://primefaces.org/ui">
    <h:head>
        <title>Facelet Title</title>
    </h:head>
    <h:body>
        Testes efetuados
        <h:form>
                <br/>
                Aluno<br/>
                <h:outputLabel for="nome" value="Nome"/>
                <h:inputText id="nome" value="#{aluno.idAluno}" />
                <h:commandButton value="enviar" action="#{aluno.teste()}"  ></h:commandButton>
                <h:outputText id="mensg" value="#{aluno.idAluno}"></h:outputText>
        </h:form>
        <br />
    </h:body>
</html>