jtable高难度问题

Question

那位大侠知道怎样能让jtable在水平滚动时最左变得两列不滚动，而其他列滚动呢？Excel里就有这样的功能

Answer 1

你可以创建２个JT来显示数据，一个表显示不可滚动的数据，一个显示滚动的数据.下面是SUN的例子import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;public class FixedColumnExample extends JFrame {
    
    Object[][] data;
    Object[] column;
    JTable fixedTable,table;
    
    public FixedColumnExample() {
        
        super( "Fixed Column Example" );
        
        setSize( 400, 150 );
        
        data =  new Object[][]{
            {"1","11","A","","","","",""},
            {"2","22","","B","","","",""},
            {"3","33","","","C","","",""},
            {"4","44","","","","D","",""},
            {"5","55","","","","","E",""},
            {"6","66","","","","","","F"}};
            column = new Object[]{"fixed 1","fixed 2","a","b","c","d","e","f"};
            
            AbstractTableModel fixedModel = new AbstractTableModel() {
                // We have two fixed rows so report 2 columns from data
                public int getColumnCount() { return 2; }
                public int getRowCount() { return data.length; }
                public String getColumnName(int col) { return (String)column[col]; }
                // As only the first two columns are reported this can stay
                // the same
                public Object getValueAt(int row, int col) { return data[row][col]; }
            };
            
            AbstractTableModel    model = new AbstractTableModel() {
                // This model has two less columns in the data as two are
                // fixed
                public int getColumnCount() { return column.length -2; }
                public int getRowCount() { return data.length; }
                public String getColumnName(int col) {
                    // The columns start 2 on in the data
                    return (String)column[col +2];
                }
                public Object getValueAt(int row, int col) {
                    // The first two column are for the fixed table so return
                    // data after by adding 2
                    return data[row][col+2];
                }
                public void setValueAt(Object obj, int row, int col) {
                    // As above
                    data[row][col +2] = obj;
                }
                public boolean isCellEditable(int row, int col) { return true; }
            };
            
            fixedTable = new JTable( fixedModel ) ;
            ListSelectionModel lsm = fixedTable.getSelectionModel();
            fixedTable.getTableHeader().setResizingAllowed(false);
            lsm.addListSelectionListener(new SelectionListener(true));
            
            table = new JTable( model ) ;
            lsm = table.getSelectionModel();
            lsm.addListSelectionListener(new SelectionListener(false));
            fixedTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
            table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
            fixedTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
            table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
            
            JScrollPane scroll = new JScrollPane( table );
            JViewport viewport = new JViewport();
            viewport.setView(fixedTable);
            viewport.setPreferredSize(fixedTable.getPreferredSize());
            scroll.setRowHeaderView(viewport);
            scroll.setCorner(JScrollPane.UPPER_LEFT_CORNER,fixedTable.getTableHeader());
            
            getContentPane().add(scroll, BorderLayout.CENTER);
    }
    
    class SelectionListener implements ListSelectionListener {
        
        boolean isFixedTable = true;
        
        public SelectionListener(boolean isFixedTable) { this.isFixedTable = isFixedTable; }
        
        public void valueChanged(ListSelectionEvent e) {
            
            if (isFixedTable)  {
                int fixedSelectedIndex = fixedTable.getSelectedRow();
                table.setRowSelectionInterval(fixedSelectedIndex,fixedSelectedIndex);
            }
            else {
                int selectedIndex = table.getSelectedRow();
                fixedTable.setRowSelectionInterval(selectedIndex,selectedIndex);
            }
        }
    }
    
    public static void main(String[] args) {
        FixedColumnExample frame = new FixedColumnExample();
        frame.addWindowListener( new WindowAdapter() {
            public void windowClosing( WindowEvent e ) {
                System.exit(0);
            }
        });
        frame.setVisible(true);
    }
}

Answer 2

同意楼上的
要是想用一个JTable的话，那就要改JViewPort的刷新，要写N多代码...