Estou utilizando a apostila da caelum e estou com problemas no desafio que tem no final da apostila, nao conseguir realizar a lógica de adiciona contato, ta dando erro na conversão da data, segue codigo e mensagem de erro:
A classe adiciona contato é essa:
package logica;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import modelo.Contato;
import pctdao.ContatoDao;
public class AdicionaContatoLogic implements Logica {
@Override
public String executa(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException {
PrintWriter out = res.getWriter();
//pegando os parâmetros do request
String nome = req.getParameter("nome");
String endereco = req.getParameter("endereco");
String email = req.getParameter("email");
String dataEmTexto = req.getParameter("dataNascimento");
Calendar dataNascimento = null;
//fazendo a conversao da data
try {
Date date = new SimpleDateFormat("dd/mm/yy").parse(dataEmTexto);
dataNascimento = Calendar.getInstance();
dataNascimento.setTime(date);
} catch(ParseException e) {
out.println("Erro de conversao da data");
return dataEmTexto; //para a execução do método
}
//monta um objeto contato
Contato contato = new Contato();
contato.setNome(nome);
contato.setEmail(email);
contato.setEndereco(endereco);
contato.setDataNascimento(dataNascimento);
contato.setId((long) 1000);
try {
ContatoDao dao = new ContatoDao();
dao.adiciona(contato);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "adiciona-contato.jsp";
}
}
A JSP de adiciona-contato.jsp é essa:
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib tagdir="/WEB-INF/tags" prefix="caelum" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insira contatos aqui</title>
<link href="css/jquery-ui.css" rel="stylesheet">
<link href="css/jquery-ui.min.css" rel="stylesheet">
<script src="js/jquery.js"></script>
<script src="js/jquery-ui.js"></script>
<!--
<script>
$(function() {
$("#dataNascimento").datepicker({
changeMonth: true,
changeYear: true
});
});
</script>
-->
</head>
<body>
<c:import url="cabecalho.jsp" />
<h1> Formulario para Preencher os dados</h1>
<hr />
<fieldset>
<form action = "add">
<input type="hidden" name="logica" value="AdicionaContatoLogic"/>
Nome: <input type="text" name="nome" /><br />
Email: <input type="text" name="email"/><br />
Endereco: <input type="text" name="endereco" /><br />
Data Nascimento: <caelum:campoData id="dataNascimento" /><br />
<input type="submit" value="Gravar"/>
<input type ="reset" value="Limpar"/>
</form>
</fieldset>
<c:import url="WEB-INF/jsp/rodape.jsp" />
</body>
</html>
A classe listar contatos logic:
package logica;
import java.util.List;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import modelo.Contato;
import pctdao.ContatoDao;
import logica.Logica;
public class ListaContatosLogic implements Logica {
public String executa(HttpServletRequest request, HttpServletResponse response)
throws Exception {
List<Contato> contatos = new ContatoDao().getLista();
request.setAttribute("contatos",contatos);
return "lista-contatos.jsp";
}
}
A jsp de de listar contatos é essa:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib tagdir="/WEB-INF/tags" prefix="caelum" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Listar contatos com JSTL</title>
</head>
<body>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<c:import url="cabecalho.jsp"/>
<table border = "1">
<tr>
<td>Nome</td>
<td>Email</td>
<td>Endereço</td>
<td>Data Nascimento</td>
</tr>
<c:forEach var="contato" items="${contatos}">
<tr>
<td>${contato.nome}</td>
<td>
<c:if test="${not empty contato.email}">
<a href="mailto:${contato.email}">${contato.email}</a>
</c:if>
<c:if test="${empty contato.email}">
Email não informado.
</c:if>
</td>
<td>${contato.endereco}</td>
<td>
${contato.dataNascimento.time}
</td>
<td>
<a href="mvc?logica=RemoveContatoLogic&id=${contato.id}">Remover</a>
</td>
<td>
<a href="mvc?logica=AlteraContatoLogic&id=${contato.id}">Alterar</a>
</td>
<td>
<a href="mvc?logica=AdicionaContatoLogic&id=${contato.id}">Adicionar Contato</a>
</td>
</tr>
</c:forEach>
</table>
<c:import url="/WEB-INF/jsp/rodape.jsp" />
</body>
</html>
MENSAGEM DE ERRO:
mar 22, 2019 8:10:08 AM org.apache.catalina.core.StandardWrapperValve invoke
GRAVE: Servlet.service() for servlet [servlets.ControllerServlet] in context with path [/TesteServlet] threw exception [A lógica de negócios causou uma exceção] with root cause
java.lang.NullPointerException
at java.text.SimpleDateFormat.parse(Unknown Source)
at java.text.DateFormat.parse(Unknown Source)
at logica.AdicionaContatoLogic.executa(AdicionaContatoLogic.java:37)
at servlets.ControllerServlet.service(ControllerServlet.java:28)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at filtro.FiltroTempoDeExecucao.doFilter(FiltroTempoDeExecucao.java:31)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)