Olá, pessoal!
Estou tentando para enviar o banco de dados, mas ocorreu a problemas, verifiquei e não encontrei a resolução de problemas.
Mensagem de Erro
GRAVE: Servlet.service() for servlet ServletCadastro threw exception
java.lang.NullPointerException
at Servlet.DAO.incluir(DAO.java:23)
at Servlet.ServletCadastro.doGet(ServletCadastro.java:24)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
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:127)
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:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
12/04/2011 01:19:57 org.apache.catalina.core.StandardContext reload
INFO: Reloading this Context has started
12/04/2011 01:19:57 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
GRAVE: The web application [/ServletComJSP2] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
12/04/2011 01:19:57 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
GRAVE: The web application [/ServletComJSP2] appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed to stop it. This is very likely to create a memory leak.
O código do DAO fica
public class CadastroDAO {
public void incluir(Cadastro c){
try {
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/testecadastro","root","");
PreparedStatement st = conn.prepareStatement("Insert into cadastro value(?,?,?)");
st.setInt(0,(Integer) null);
st.setString(1,c.getNome());
st.setInt(2,c.getIdade());
st.executeUpdate();
} catch (ClassNotFoundException e) {
System.err.println(e.getMessage());
e.printStackTrace();
} catch (SQLException e) {
System.err.println(e.getMessage());
e.printStackTrace();
}
}
}
Espero que me ajudem… Obrigado!!
