如何使一個MySQL的表列不可見

Question

我在ID列上運行查詢，但我不希望它在我的框架/窗格中可見。 我該如何實現？ 我可以再創建一張表嗎，sql / mysql中是否有一個函數可以隱藏列？ 我試圖用谷歌搜索，但還沒有發現任何東西。 這是代碼：

public void tableChanged(TableModelEvent e) {
    int row = e.getFirstRow();
    int col = e.getColumn();
    model = (MyTableModel) e.getSource();
    String stulpPav = model.getColumnName(col);
    Object data = model.getValueAt(row, col);
    Object studId = model.getValueAt(row, 0);
    System.out.println("tableChanded works");
    try {
        new ImportData(stulpPav, data, studId);
    } catch (ClassNotFoundException e1) {
        e1.printStackTrace();
    } catch (SQLException e1) {
        e1.printStackTrace();
    }
}
public class ImportData {
    Connection connection = TableWithBottomLine.getConnection();

    public ImportData(String a, Object b, Object c)
            throws ClassNotFoundException, SQLException {
        Statement stmt = null;
        try {

            String stulpPav = a;
            String duom = b.toString();
            String studId = c.toString();
            System.out.println(duom);
            connection.setAutoCommit(false);
            stmt = connection.createStatement();
            stmt.addBatch("update finance.fin set " + stulpPav + " = " + duom
                    + " where ID = " + studId + ";");
            stmt.executeBatch();
            connection.commit();
        } catch (BatchUpdateException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (stmt != null)
                stmt.close();
            connection.setAutoCommit(true);
            System.out.println("Data was imported to database");
        }
    }   
    }        
public class MyTableModel extends AbstractTableModel{
    int rowCount;
    Object data [][];
    String columnNames [];
    public  MyTableModel() throws SQLException{
        String query ="SELECT ID, tbl_Date as Date, Flat, Mobile, Food, Alcohol, Transport, Outdoor, Pauls_stuff, Income, Stuff FROM finance.fin";
        ResultSet rs ;
        Connection connection = TableWithBottomLine.getConnection();

        Statement stmt = null;
        stmt = connection.createStatement();
        rs = stmt.executeQuery(query);

        rs.last();
        rowCount = rs.getRow();
        data = new Object[rowCount][11];
        rs = stmt.executeQuery(query);
        for (int iEil = 0; iEil < rowCount; iEil++){
            rs.next();
            data[iEil][0] = rs.getInt("ID");
            data[iEil][1] = rs.getDate("Date");
            data[iEil][2] = rs.getFloat("Flat");
            data[iEil][3]  = rs.getFloat("Mobile");
            data[iEil][4] = rs.getFloat("Food");
            data[iEil][5]  = rs.getFloat("Alcohol");
            data[iEil][6] = rs.getFloat("Transport");
            data[iEil][7] = rs.getFloat("Outdoor");
            data[iEil][8] = rs.getFloat("Pauls_stuff");
            data[iEil][9] = rs.getFloat("Income");
            data[iEil][10] = rs.getFloat("Stuff");
        }

         String[] columnName  = {"ID", "Date","Flat","Mobile"        
                ,"Food","Alcohol","Transport", "Outdoor", "Pauls_stuff", "Income", "Stuff"};
         columnNames = columnName;
    }

Answer 1

這解決了我的問題：

table.removeColumn(table.getColumnModel().getColumn(0));

我把它放在班級建設者中。 這樣就可以從表的視圖中刪除該列，但TableModel仍包含“ ID”列。 我發現很多人都在尋找一種從sql / mysql中的SELECT語句中排除特定列（例如自動增量）的選項，但是語言本身不具有該功能。 因此，我希望該解決方案也能對其他人有所幫助。

Answer 2

不要將ID放入查詢的選擇部分

String query ="SELECT tbl_Date as Date, Flat, Mobile, Food, Alcohol, Transport,    
Outdoor, Pauls_stuff, Income, Stuff FROM finance.fin";