ME AJUDEM - Atualizar ultimo registro do banco de dados numa pagina JSP

<?xml version="1.0" encoding="UTF-8"?>

<jsp:root version="2.1" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:jsp="http://java.sun.com/JSP/Page" xmlns:webuijsf="http://www.sun.com/webui/webuijsf">
    <jsp:directive.page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"/>
    <f:view>
        <webuijsf:page id="page1">
            <webuijsf:html id="html1">
                <webuijsf:head id="head1">
                    <webuijsf:link id="link1" url="/resources/stylesheet.css"/>
                </webuijsf:head>
                <webuijsf:body id="body1" style="-rave-layout: grid">
                    <webuijsf:form id="form1">

                        TEMPERATURA = <h:outputText value="#{DadosBean.valorTemperatura}"/>
                        
                    </webuijsf:form>
                </webuijsf:body>
            </webuijsf:html>
        </webuijsf:page>
    </f:view>
</jsp:root>

public void buscarDados() throws SQLException {
        conexao = new Conexao();
        conexao.criarConexao();
        String sql = " SELECT * FROM dados";
        Statement stm = conexao.getConnection().createStatement();
        rs = stm.executeQuery(sql);
        if (rs.last()) {
            Temperatura = rs.getString("temperatura");
        }

        rs.close();
        stm.close();
    }