Conexão ao SQLServer

public class FabricaDeConexao {
     public static Connection conn;
     public static Statement stmt;
     public static ResultSet rs;
    
    //String url = "jdbc:sqlserver://servidorsimula:1433/TrimboxTeste";
     String url = "jdbc:sqlserver://servidorsimula:1433;TrimboxTeste=TrimboxTeste";
    //String driver = "com.sqlserver.jdbc.Driver";
     String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
    String user = "sopasta_ti";
    String password = "ti_sopasta";
    
    public void abrirConexao(){
        try{
            Class.forName(driver);
            conn = DriverManager.getConnection(url, user, password);
            stmt = (Statement) conn.createStatement();
        }catch(Exception e){
            System.out.println(e.getMessage() + "\n" + e.getCause());
        }
    }
    /*public static void main(String[]args){
        FabricaDeConexao fab = new FabricaDeConexao();
        fab.abrirConexao();*/
    
    

}

public void acessarSistema(){
        
        try {
        FabricaDeConexao fab = new FabricaDeConexao();
        fab.abrirConexao();
        //fab.stmt = (Statement) fab.conn.createStatement();
        fab.stmt = fab.conn.createStatement();
        
        String login = jTextField1.getText();
        
        String sql = "SELECT * FROM dbo.usuario WHERE nome = '" + login + "'";
        fab.rs = fab.stmt.executeQuery(sql);
        fab.rs.next();
       
        if(jTextField1.getText().equals(fab.rs.getString("nome")) && jPasswordField1.getText().equals(fab.rs.getString("senha"))){
              Tela_Principal tel = new Tela_Principal();
              tel.setVisible(true);
              this.setVisible(false);
              
              
           //   InformacaoCorrente.setNivelacesso(Integer.parseInt(rs.getString("nivelacesso")));
  
              
        }else{
            jTextField1.setText("");
            jPasswordField1.setText("");
            JOptionPane.showMessageDialog(null, "Login ou Senha Incorretos. Tente Novamente!");
        }
        }catch (Exception e){
            System.out.println(e.getMessage() + "\n" + e.getCause());
        }
        
     
    }