Problema com conexão em java com mysql[RESOLVIDO]

Bom dia, estou estudando a apostila da caelum fj21 e estou tendo problema em fazer a ConnectionFactory, pelo meu ver fiz tudo como a apostila indica mas estou tendo erro. Criei a uma base fj21 no mysql, adicionei o driver do mysql na minha build path do projeto mas na hora de roda tenho a seguinte exeption

[code]Exception in thread “main” java.lang.RuntimeException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at br.com.caelum.jdbc.ConnectionFactory.getConnection(ConnectionFactory.java:14)
at br.com.caelum.jdbc.teste.TesteConexao.main(TesteConexao.java:11)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
at com.mysql.jdbc.MysqlIO.(MysqlIO.java:350)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2393)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2430)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2215)
at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:813)
at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:221)
at br.com.caelum.jdbc.ConnectionFactory.getConnection(ConnectionFactory.java:11)
… 1 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.(Socket.java:425)
at java.net.Socket.(Socket.java:241)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:257)
at com.mysql.jdbc.MysqlIO.(MysqlIO.java:300)
… 16 more
[/code]

para melhor me auxiliarem vou postar as outras duas classes

[code]package br.com.caelum.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class ConnectionFactory {

public Connection getConnection() {
	try {

		return DriverManager.getConnection("jdbc:mysql://localhost/fj21",
				"root", "root");
	} catch (SQLException e) {
		throw new RuntimeException(e);
	}
}

}
[/code]

[code]package br.com.caelum.jdbc.teste;

import java.sql.Connection;
import java.sql.SQLException;

import br.com.caelum.jdbc.ConnectionFactory;

public class TesteConexao {

public static void main(String[] args) throws SQLException {
	Connection connection = new ConnectionFactory().getConnection();
	System.out.println("Conexão aberta!");
	connection.close();
}

}
[/code]

Este erro The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Indica que o banco de dados:

  • Não existe
  • Não está rodando
  • O endereço está errado
  • A porta está errada

Opa, blz?

faltou a porta, configurasse a padrão, 3306?

tenta assim na sua string de configuração:

return DriverManager.getConnection("jdbc:mysql://localhost:3306/fj21", "root", "root");

adiciona o :3306 depois de localhost

abraço

Obrigado, o problema estava na minha porta do mysql, esta rodando na 3307

Quando você omite a porta, o Driver do MySQL define-a como sendo 3306.
Pelo número da porta, creio que use Mac, certo?

Bom, na verdade estou usando windows 7 não sei oque pode ter acontecido.

Estranho. Sempre vi essa porta no Mac.
Pode ter sido algum outro problema.
O importante é que está funcionando.

Sim hehehehehehe isso que importa :smiley: