16i.txt

一本关于JBuilder 应用开发的书籍,希望大家喜欢,其实我没看过的,

  public void ejbLoad() throws RemoteException
  {
    //得到PK
    _name = ((AccountPK) _context.getPrimaryKey()).name;
    Connection connection = null;
    PreparedStatement statement = null;
    try 
    {
      connection = getConnection();
      statement = connection.prepareStatement("SELECT balance FROM Savings_Accounts WHERE name = ?");
      statement.setString(1, _name);
      ResultSet resultSet = statement.executeQuery();
      if(!resultSet.next())
      {
        throw new RemoteException("Account not found: " + _name);
      }
      _balance = resultSet.getFloat(1);
    }
    catch(SQLException e)
    {
      throw new RemoteException("Could not load: " + _name, e);
    }
    finally
    {
      try
      {
        if (statement != null)
        {
          statement.close();
        }
        if (connection != null)
        {
          connection.close();
        }
      }
      catch (SQLException sqe)
      {
        throw new RemoteException("Could not load: " + _name, sqe);
      }
    }
  }