Erro com Banco de Dados

<blockquote>C:\Transferência_Zu\Sistema SSTintas>java -jar sstintas.jar

org.postgresql.util.PSQLException: ConexÒo negada. Verifique se o nome da maquina e a porta estão corretos e se o postmaster está aceitando conex§es TCP/IP.

at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(Conne

ctionFactoryImpl.java:122)

at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactor

y.java:65)

at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Conn

ection.java:117)

at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Conn

ection.java:30)

at org.postgresql.jdbc3.Jdbc3Connection.<init>(Jdbc3Connection.java:24)

at org.postgresql.Driver.connect(Driver.java:195)

at java.sql.DriverManager.getConnection(Unknown Source)

at java.sql.DriverManager.getConnection(Unknown Source)

at br.com.sstintas.modelo.bd.GerenciadorBD.getConexao(GerenciadorBD.java

:19)

at br.com.sstintas.modelo.bd.GerenciadorBDFuncionario.consultaUsuarioSen

ha(GerenciadorBDFuncionario.java:293)

at br.com.sstintas.view.AcessoView$2.actionPerformed(AcessoView.java:154

)

at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.setPressed(Unknown Source)

at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour

ce)

at java.awt.Component.processMouseEvent(Unknown Source)

at javax.swing.JComponent.processMouseEvent(Unknown Source)

at java.awt.Component.processEvent(Unknown Source)

at java.awt.Container.processEvent(Unknown Source)

at java.awt.Component.dispatchEventImpl(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Window.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

Caused by: java.net.ConnectException: Connection refused: connect

at java.net.PlainSocketImpl.socketConnect(Native Method)

at java.net.PlainSocketImpl.doConnect(Unknown Source)

at java.net.PlainSocketImpl.connectToAddress(Unknown Source)

at java.net.PlainSocketImpl.connect(Unknown Source)

at java.net.SocksSocketImpl.connect(Unknown Source)

at java.net.Socket.connect(Unknown Source)

at java.net.Socket.connect(Unknown Source)

at java.net.Socket.<init>(Unknown Source)

at java.net.Socket.<init>(Unknown Source)

at org.postgresql.core.PGStream.<init>(PGStream.java:58)

at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(Conne

ctionFactoryImpl.java:77)

… 34 more

Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException

at br.com.sstintas.modelo.bd.GerenciadorBDFuncionario.consultaUsuarioSen

ha(GerenciadorBDFuncionario.java:293)

at br.com.sstintas.view.AcessoView$2.actionPerformed(AcessoView.java:154

)

at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.setPressed(Unknown Source)

at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour

ce)

at java.awt.Component.processMouseEvent(Unknown Source)

at javax.swing.JComponent.processMouseEvent(Unknown Source)

at java.awt.Component.processEvent(Unknown Source)

at java.awt.Container.processEvent(Unknown Source)

at java.awt.Component.dispatchEventImpl(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Window.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)</blockquote>