Swing 中给表格加上行头

实现代码如下：

public class TableRowHeaderTest { public static void main(String[] args) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { e.printStackTrace(); } new TableRowHeaderFrame(); } } class TableRowHeaderFrame extends JFrame { public TableRowHeaderFrame(){ DefaultTableModel model = new DefaultTableModel(500,10); JTable table = new JTable(model); /*将table加入JScrollPane*/ JScrollPane scrollPane = new JScrollPane(table); /*将rowHeaderTable作为row header加入JScrollPane的RowHeaderView区域*/ scrollPane.setRowHeaderView(new RowHeaderTable(table,40)); this.getContentPane().add(scrollPane,BorderLayout.CENTER); this.setVisible(true); this.setSize(400,200); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } } /** * 用于显示RowHeader的JTable，只需要将其加入JScrollPane的RowHeaderView即可为JTable生成行标题 */ class RowHeaderTable extends JTable { private JTable refTable;//需要添加rowHeader的JTable /** * 为JTable添加RowHeader， * @param refTable 需要添加rowHeader的JTable * @param columnWideth rowHeader的宽度 */ public RowHeaderTable(JTable refTable,int columnWidth){ super(new RowHeaderTableModel(refTable.getRowCount())); this.refTable=refTable; this.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);//不可以调整列宽 this.getColumnModel().getColumn(0).setPreferredWidth(columnWidth); this.setDefaultRenderer(Object.class,new RowHeaderRenderer(refTable,this));//设置渲染器 this.setPreferredScrollableViewportSize (new Dimension(columnWidth,0)); } } /** * 用于显示RowHeader的JTable的渲染器，可以实现动态增加，删除行，在Table中增加、删除行时RowHeader * 一起变化。当选择某行时，该行颜色会发生变化 */ class RowHeaderRenderer extends JLabel implements TableCellRenderer,ListSelectionListener { JTable reftable;//需要添加rowHeader的JTable JTable tableShow;//用于显示rowHeader的JTable public RowHeaderRenderer(JTable reftable,JTable tableShow) { this.reftable = reftable; this.tableShow=tableShow; //增加监听器，实现当在reftable中选择行时，RowHeader会发生颜色变化 ListSelectionModel listModel=reftable.getSelectionModel(); listModel.addListSelectionListener(this); } public Component getTableCellRendererComponent(JTable table,Object obj, boolean isSelected,boolean hasFocus,int row, int col) { ((RowHeaderTableModel)table.getModel()).setRowCount(reftable.getRowCount()); JTableHeader header = reftable.getTableHeader(); this.setOpaque(true); setBorder(UIManager.getBorder("TableHeader.cellBorder"));//设置为TableHeader的边框类型 setHorizontalAlignment(CENTER);//让text居中显示 setBackground(header.getBackground());//设置背景色为TableHeader的背景色 if ( isSelect(row) ) //当选取单元格时,在row header上设置成选取颜色 { setForeground(Color.white); setBackground(Color.lightGray); } else { setForeground(header.getForeground()); } setFont(header.getFont()); setText(String.valueOf(row+1)); return this; } public void valueChanged(ListSelectionEvent e){ this.tableShow.repaint(); } private boolean isSelect(int row) { int[] sel = reftable.getSelectedRows(); for ( int i=0; i