JTable中合并单元格

1、/* * SimpleTableDemo.java is a 1.4 application that requires no other files. */ /编辑的时候直接从覆盖原有内容 import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import java.awt.Dimension; import java.awt.GridLayout; import java.awt.event.MouseAdapter;

2、import java.awt.event.MouseEvent; import java.util.*; import java.awt.event.*; import javax.swing.*; import javax.swing.table.*; import java.io.*; import java.util.*; public class Combine extends JPanel private boolean DEBUG = false; JTable table; public Combine() super(new GridLayout(1,0); table =

3、new JTable( new MyTableModel() ); table.setPreferredScrollableViewportSize(new Dimension(500, 70); / table.setDefaultEditor( String.class, new SelEditor() ); /Create the scroll pane and add the table to it. JScrollPane scrollPane = new JScrollPane(table); /Add the scroll pane to this panel. add(scro

4、llPane); /* * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() /Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true); /Create and set up the window. JFrame f

5、rame = new JFrame("MyCustomTable2"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); /Create and set up the content pane. Combine newContentPane = new Combine(); newContentPane.setOpaque(true); /content panes must be opaque frame.setContentPane(newContentPane); /Display the window. f

6、rame.pack(); frame.setVisible(true); try Thread.sleep( 1000 ); catch ( InterruptedException e ) e.printStackTrace(); (MyTableModel)newContentPane.table.getModel().combineRow( "First Name", "Last Name" ); public static void main(String args) /Schedule a job for the event-dispatchi

7、ng thread: /creating and showing this application´s GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() public void run() createAndShowGUI(); ); class MyTableModel extends AbstractTableModel private String columnNames = "First Name", "Last Name", "Sport", &q

8、uot;# of Years", "Vegetarian" private List cList = new ArrayList(); for( int i = 0; i < columnNames.length; i + ) cList.add( columnNames i ); private Object data = "Mary", "Campione", "Snowboarding", new Integer(5), new Boolean(false), "Alison&quo

9、t;, "Huml", "Rowing", new Integer(3), new Boolean(true), "Kathy", "Walrath", "Knitting", new Integer(2), new Boolean(false), "Sharon", "Zakhour", "Speed reading", new Integer(20), new Boolean(true), "Philip", &

10、quot;Milne", "Pool", new Integer(10), new Boolean(false) ; private List dList = new ArrayList(); for( int i = 0; i < data.length; i + ) List tmp = new ArrayList(); for( int j = 0; j < data i .length; j + ) tmp.add( data i j ); dList.add( tmp ); public int getColumnCount() return

11、 cList.size(); public int getRowCount() return dList.size(); public String getColumnName(int col) return (String)cList.get( col ); public Object getValueAt(int row, int col) return (List)dList.get( row ).get( col ); public void combineRow( String r1, String r2 ) int index1 = cList.indexOf( r1 ); int

12、 index2 = cList.indexOf( r2 ); cList.set( index1, r1+r2 ); cList.remove( r2 ); for( int i = 0; i < dList.size(); i + ) List list = (List)dList.get( i ); list.set( index1, list.get( index1 ).toString() + list.get( index2 ) ); list.remove( index2 ); fireTableStructureChanged(); /* * JTable uses thi

13、s method to determine the default renderer/ * editor for each cell. If we didn´t implement this method, * then the last column would contain text ("true"/"false"), * rather than a check box. */ public Class getColumnClass(int c) return cList.get( c ).getClass(); public boole

14、an isCellEditable(int row, int col) /Note that the data/cell address is constant, /no matter where the cell appears onscreen. return true; public void setValueAt(Object value, int row, int col) (List)dList.get( row ).set( col , value ); fireTableCellUpdated(row, col); private void printDebugData() i

15、nt numRows = getRowCount(); int numCols = getColumnCount(); for (int i=0; i < numRows; i+) System.out.print(" row " + i + ":"); for (int j=0; j < numCols; j+) System.out.print(" " + (List)dList.get( i ).get( j ); System.out.println(); System.out.println("-&qu

16、ot;); 请仔细看MyTableModel的实现第二个：/* (swing1.1beta3) */package tame.examples;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.awt.*;import javax.swing.*;import javax.swing.table.*;import tame.table.ColumnGroup;import tame.table.GroupableTableHeader;import tame.table.Group

17、ableTableHeaderUI;/*<pre>* |-|* |        |       Name      |         Language         |* |     

18、0;  |-|-|* |  SNo.  |        |        |        |      Others     |* |        |   1 &#

19、160;  |    2   | Native |-|* |        |        |        |        |   2    |   3  

20、0; |* |-|* |        |        |        |        |        |        |</pre>author Nobuo

21、 Tamemasaversion 1.0 11/09/98*/public class GroupableHeaderExample extends JFrame     GroupableHeaderExample()       super( "Groupable Header Example" );      DefaultTableModel dm = new DefaultTableModel();   &

22、#160;  dm.setDataVector(new Object        "119","foo","bar","ja","ko","zh",        "911","bar","foo","en","fr",&quo

23、t;pt",      new Object"SNo.","1","2","Native","2","3");      JTable table = new JTable( dm ) protected JTableHeader createDefaultTableHeader()        

24、     return new GroupableTableHeader(columnModel);              ;      TableColumnModel cm = table.getColumnModel();  /得到列模型，可以取出表头      ColumnGroup g_name = new Col

25、umnGroup("Name");      g_name.add(cm.getColumn(1);      g_name.add(cm.getColumn(2);      ColumnGroup g_lang = new ColumnGroup("Language");      g_lang.add(cm.getColumn(3); 

26、60;    ColumnGroup g_other = new ColumnGroup("Others");      g_other.add(cm.getColumn(4);      g_other.add(cm.getColumn(5);      g_lang.add(g_other);      GroupableTableHeader

27、 header = (GroupableTableHeader)table.getTableHeader();      header.addColumnGroup(g_name);      header.addColumnGroup(g_lang);      TableCellRenderer renderer =  new DefaultTableCellRenderer()     &#

28、160;     public Component getTableCellRendererComponent(JTable table, Object value,                           boolean isSelected, boolean hasFocus, in

29、t row, int column)             JTableHeader header = table.getTableHeader();            if (header != null)               set

30、Foreground(header.getForeground();              setBackground(header.getBackground();              setFont(header.getFont();       

31、0;                setHorizontalAlignment(JLabel.CENTER);            setText(value = null) ? "" : value.toString();        

32、60;   setBorder(UIManager.getBorder("TableHeader.cellBorder");            return this;                  ;      TableColu

33、mnModel model = table.getColumnModel();      for (int i=0;i<model.getColumnCount();i+)         model.getColumn(i).setHeaderRenderer(renderer);              table.getTableHeader(

34、).setUI(new GroupableTableHeaderUI();      JScrollPane scroll = new JScrollPane( table );      getContentPane().add( scroll );      setSize( 400, 120 );        public static void main(String args

35、)       GroupableHeaderExample frame = new GroupableHeaderExample();      frame.addWindowListener( new WindowAdapter()         public void windowClosing( WindowEvent e )     System.exit(0);  

36、;            );      frame.setVisible(true);    _public class GroupableHeaderExample extends JFrame   GroupableHeaderExample()     super( "Groupable Header Example" );  &

37、#160; DefaultTableModel dm = new DefaultTableModel();    dm.setDataVector(new Object      "119","foo","bar","ja","ko","zh",      "911","bar","foo"

38、;,"en","fr","pt",    new Object"SNo.","1","2","Native","2","3");    JTable table = new JTable( dm )       protected JTableHeader createDefaultTableHeader()

39、   return new GroupableTableHeader(columnModel);          ;    TableColumnModel cm = table.getColumnModel();    ColumnGroup g_name = new ColumnGroup("Name");    g_name.add(cm.getColumn(1);  

40、  g_name.add(cm.getColumn(2);    ColumnGroup g_lang = new ColumnGroup("Language");    g_lang.add(cm.getColumn(3);    ColumnGroup g_other = new ColumnGroup("Others");    g_other.add(cm.getColumn(4);   

41、 g_other.add(cm.getColumn(5);    g_lang.add(g_other);    GroupableTableHeader header = (GroupableTableHeader)table.getTableHeader();    header.addColumnGroup(g_name);    header.addColumnGroup(g_lang);    TableCellRenderer ren

42、derer =  new DefaultTableCellRenderer()         public Component getTableCellRendererComponent(JTable table, Object value,                       

43、  boolean isSelected, boolean hasFocus, int row, int column)           JTableù”vRNýYùPÿÙ/fHNNÞVN ÿSàV:N(WHQMRvheader-NòÏQÇmarginvîNÿTbÍY/ RNdkmargin0OïSåNôf9eGr

44、oupableTableHeaderUIvpaint¹eÕlÿ Rd();                    setHorizontalAlignment(JLabel.CENTER);          setText(value = null) ? "" : value.

45、toString();          setBorder(UIManager.getBorder("TableHeader.cellBorder");          return this;              ;    TableCo

46、lumnModel model = table.getColumnModel();    for (int i=0;i<model.getColumnCount();i+)       model.getColumn(i).setHeaderRenderer(renderer);        JScrollPane scroll = new JScrollPane( table );    getContentPane

47、().add( scroll );    setSize( 400, 120 );    public static void main(String args)     GroupableHeaderExample frame = new GroupableHeaderExample();    frame.addWindowListener( new WindowAdapter()       public void windowC

48、losing( WindowEvent e )   System.exit(0);          );    frame.setVisible(true);  我发现表头和所对应的列不能够对齐，这是怎么一回事 ？原因为在先前的header中已经考虑过margin的问题了，而后面重复累加了此margin。你可以更改GroupableTableHeaderUI的paint方法，删除对margin的累加。本来我已经看到这种不能对齐的情况，没想到你真的来问。不过我还是鼓

49、励你自己解决，实在不行的话，在来此问。具体代码如下： public void paint(Graphics g, JComponent c) Rectangle clipBounds = g.getClipBounds(); if (header.getColumnModel() = null) return;/ (GroupableTableHeader)header).setColumnMargin(); int column = 0; Dimension size = header.getSize(); Rectangle cellRect = new Rectangle(0, 0, size.width, s