Pessoal!!! Eu sou iniciante em VRaptor e na verdade, no mundo dos frameworks!! :roll:
Pelo amor de Deus!! :shock: Me ajudem eu não sei mais o que eu faço!!! Tô achando que é bug do VRaptor mas espero que Não!!!
Eu fiz o exemplo do tutorial de 10min do VRaptor. Então acesso minha página formulário em produtos/form. Preencho os dados e clico ok, então ele vai para meu método adiciona na classe ProdutosController e dá o seguinte erro:
19/10/2009 12:00:18 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet default threw exception
br.com.caelum.vraptor.InterceptionException: java.lang.NullPointerException
at br.com.caelum.vraptor.interceptor.ExecuteMethodInterceptor.intercept(ExecuteMethodInterceptor.java:72)
at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:45)
at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
at br.com.caelum.vraptor.interceptor.ParametersInstantiatorInterceptor.intercept(ParametersInstantiatorInterceptor.java:83)
at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:45)
at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
at br.com.caelum.vraptor.interceptor.InstantiateInterceptor.intercept(InstantiateInterceptor.java:42)
at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:39)
at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
at br.com.caelum.vraptor.interceptor.multipart.MultipartInterceptor.intercept(MultipartInterceptor.java:74)
at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:45)
at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
at br.com.caelum.vraptor.interceptor.InterceptorListPriorToExecutionExtractor.intercept(InterceptorListPriorToExecutionExtractor.java:46)
at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:45)
at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
at br.com.caelum.vraptor.core.URLParameterExtractorInterceptor.intercept(URLParameterExtractorInterceptor.java:35)
at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:45)
at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
at br.com.caelum.vraptor.interceptor.ResourceLookupInterceptor.intercept(ResourceLookupInterceptor.java:58)
at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:45)
at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:59)
at br.com.caelum.vraptor.core.DefaultRequestExecution.execute(DefaultRequestExecution.java:59)
at br.com.caelum.vraptor.VRaptor$1.insideRequest(VRaptor.java:87)
at br.com.caelum.vraptor.ioc.spring.SpringProvider.provideForRequest(SpringProvider.java:55)
at br.com.caelum.vraptor.VRaptor.doFilter(VRaptor.java:85)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at br.com.jcomputacao.vraptor.controller.ProdutosController.adiciona(ProdutosController.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at br.com.caelum.vraptor.interceptor.ExecuteMethodInterceptor.intercept(ExecuteMethodInterceptor.java:50)
... 36 more
Minha classe ProdutosController:
[code]package br.com.jcomputacao.vraptor.controller;
import br.com.caelum.vraptor.Resource;
import br.com.jcomputacao.vraptor.dao.ProdutoDao;
import br.com.jcomputacao.vraptor.model.Produto;
import java.sql.SQLException;
import java.util.List;
@Resource
public class ProdutosController {
private ProdutoDao dao;
public ProdutosController() {
}
public void form () {
}
public void adiciona(Produto produto) throws SQLException {
dao.adiciona(produto);
}
public List<Produto> lista() {
return dao.listaTodos();
}
}[/code]
Meu ProdutoDao:
[code]package br.com.jcomputacao.vraptor.dao;
import br.com.jcomputacao.jdbc.ConnectionPool;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import br.com.jcomputacao.vraptor.model.Produto;
public class ProdutoDao {
private Connection con;
public ProdutoDao() throws SQLException {
this.con = ConnectionPool.getConnection();
}
public List<Produto> listaTodos() {
return new ArrayList<Produto>();
}
public void adiciona(Produto produto) throws SQLException {
String sql = "INSERT INTO produto (nome,descricao,preco) VALUES (?,?,?)";
PreparedStatement stmt;
stmt = con.prepareStatement(sql);
stmt.setString(1,produto.getNome());
stmt.setString(2,produto.getDescricao());
stmt.setDouble(3,produto.getPreco());
stmt.execute();
System.out.println("Gravado com Sucesso!");
stmt.close();
System.out.println("Conexão Fechada.");
}
}[/code]
Agradeço antecipadamente!!