Question

我正在用Java创建一个医院项目，我已经创建了一个JTable，它从SQL数据库获取医院名称和医院图像链接，即"Click to see more"。我的问题是数据已成功从数据库提取到表中，但我无法单击表格单元格中的链接。

如何激活链接？

Answer 1

考虑使用JXTable（SwingX类）：它支持超链接渲染器，可根据单元格值配置为执行任何操作

JXTable table = new JXTable(myModel);
AbstractHyperlinkAction<Object> simpleAction = new AbstractHyperlinkAction<Object>(null) {

    public void actionPerformed(ActionEvent e) {
        // here goes what you want to do on activating the hyperlink
        //LOG.info("hit: " + getTarget());
    }

};
TableCellRenderer renderer = new DefaultTableRenderer(
    new HyperlinkProvider(simpleAction));
table.getColumnExt(0).setEditable(false);
table.getColumnExt(0).setCellRenderer(renderer);

Answer 2

您可以制作TableCellEditor isCellEditable方法，只需点击一下鼠标即可激活MouseListener方法。坦率地说，这只会变得混乱。

或者，您可以直接将mouseClicked附加到表格中并监控{{1}}事件。

在点击的活动中，您可能需要getSelectedColumn和getSelectedRow来确定他们是否点击了您想要的列，并使用{{3}从所选单元格中获取链接值}

您需要考虑到表格可能会被排序，或者列不再按照您启动它们的顺序排列（用户可能已移动它们）。

然后您需要getValueAt和convertColumnIndexToView

简单：D

Answer 3

我认为避免使用外部库是MadProgrammer建议的更好的方法，但我认为swingx仍然是纯粹的java。无论如何，我会使用mouseClicked监听器，然后按照这个问题How to add hyperlink in JLabel中描述的方式打开uri。

JTable table = new JTable();

table.addMouseListener(new MouseAdapter() {
  public void mouseClicked(MouseEvent e) {

        int row = table.getSelectedRow();
        int col = table.getSelectedColumn();

        //build your address / link

        URI uri = new URI("http: your link here");

        //see below
        open(uri);
      }
    });

//Then elsewhere as from the McDowell answer
private static void open(URI uri) {
  if (Desktop.isDesktopSupported()) {
    try {
       Desktop.getDesktop().browse(uri);
      } catch (IOException e) { /* TODO: error handling */ }
   } else { /* TODO: error handling */ }
 }

Answer 4

我解决了在单元格中添加一个按钮，我从Rob Camick那里学习了Table Button Column教程：

String[] columnNames = {"First Name", "Last Name", ""};
Object[][] data =
{
    {"Homer", "Simpson", "delete Homer"},
    {"Madge", "Simpson", "delete Madge"},
    {"Bart",  "Simpson", "delete Bart"},
    {"Lisa",  "Simpson", "delete Lisa"},
};

DefaultTableModel model = new DefaultTableModel(data, columnNames);
JTable table = new JTable( model );

然后：

Action delete = new AbstractAction()
{
    public void actionPerformed(ActionEvent e)
    {
        JTable table = (JTable)e.getSource();
        int modelRow = Integer.valueOf( e.getActionCommand() );
        ((DefaultTableModel)table.getModel()).removeRow(modelRow);
    }
};

ButtonColumn buttonColumn = new ButtonColumn(table, delete, 2);
buttonColumn.setMnemonic(KeyEvent.VK_D);

ButtonColumn类在哪里：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;

/**
 *  The ButtonColumn class provides a renderer and an editor that looks like a
 *  JButton. The renderer and editor will then be used for a specified column
 *  in the table. The TableModel will contain the String to be displayed on
 *  the button.
 *
 *  The button can be invoked by a mouse click or by pressing the space bar
 *  when the cell has focus. Optionally a mnemonic can be set to invoke the
 *  button. When the button is invoked the provided Action is invoked. The
 *  source of the Action will be the table. The action command will contain
 *  the model row number of the button that was clicked.
 *
 */
public class ButtonColumn extends AbstractCellEditor
    implements TableCellRenderer, TableCellEditor, ActionListener, MouseListener
{
    private JTable table;
    private Action action;
    private int mnemonic;
    private Border originalBorder;
    private Border focusBorder;

    private JButton renderButton;
    private JButton editButton;
    private Object editorValue;
    private boolean isButtonColumnEditor;

    /**
     *  Create the ButtonColumn to be used as a renderer and editor. The
     *  renderer and editor will automatically be installed on the TableColumn
     *  of the specified column.
     *
     *  @param table the table containing the button renderer/editor
     *  @param action the Action to be invoked when the button is invoked
     *  @param column the column to which the button renderer/editor is added
     */
    public ButtonColumn(JTable table, Action action, int column)
    {
        this.table = table;
        this.action = action;

        renderButton = new JButton();
        editButton = new JButton();
        editButton.setFocusPainted( false );
        editButton.addActionListener( this );
        originalBorder = editButton.getBorder();
        setFocusBorder( new LineBorder(Color.BLUE) );

        TableColumnModel columnModel = table.getColumnModel();
        columnModel.getColumn(column).setCellRenderer( this );
        columnModel.getColumn(column).setCellEditor( this );
        table.addMouseListener( this );
    }


    /**
     *  Get foreground color of the button when the cell has focus
     *
     *  @return the foreground color
     */
    public Border getFocusBorder()
    {
        return focusBorder;
    }

    /**
     *  The foreground color of the button when the cell has focus
     *
     *  @param focusBorder the foreground color
     */
    public void setFocusBorder(Border focusBorder)
    {
        this.focusBorder = focusBorder;
        editButton.setBorder( focusBorder );
    }

    public int getMnemonic()
    {
        return mnemonic;
    }

    /**
     *  The mnemonic to activate the button when the cell has focus
     *
     *  @param mnemonic the mnemonic
     */
    public void setMnemonic(int mnemonic)
    {
        this.mnemonic = mnemonic;
        renderButton.setMnemonic(mnemonic);
        editButton.setMnemonic(mnemonic);
    }

    @Override
    public Component getTableCellEditorComponent(
        JTable table, Object value, boolean isSelected, int row, int column)
    {
        if (value == null)
        {
            editButton.setText( "" );
            editButton.setIcon( null );
        }
        else if (value instanceof Icon)
        {
            editButton.setText( "" );
            editButton.setIcon( (Icon)value );
        }
        else
        {
            editButton.setText( value.toString() );
            editButton.setIcon( null );
        }

        this.editorValue = value;
        return editButton;
    }

    @Override
    public Object getCellEditorValue()
    {
        return editorValue;
    }

//
//  Implement TableCellRenderer interface
//
    public Component getTableCellRendererComponent(
        JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
    {
        if (isSelected)
        {
            renderButton.setForeground(table.getSelectionForeground());
            renderButton.setBackground(table.getSelectionBackground());
        }
        else
        {
            renderButton.setForeground(table.getForeground());
            renderButton.setBackground(UIManager.getColor("Button.background"));
        }

        if (hasFocus)
        {
            renderButton.setBorder( focusBorder );
        }
        else
        {
            renderButton.setBorder( originalBorder );
        }

//      renderButton.setText( (value == null) ? "" : value.toString() );
        if (value == null)
        {
            renderButton.setText( "" );
            renderButton.setIcon( null );
        }
        else if (value instanceof Icon)
        {
            renderButton.setText( "" );
            renderButton.setIcon( (Icon)value );
        }
        else
        {
            renderButton.setText( value.toString() );
            renderButton.setIcon( null );
        }

        return renderButton;
    }

//
//  Implement ActionListener interface
//
    /*
     *  The button has been pressed. Stop editing and invoke the custom Action
     */
    public void actionPerformed(ActionEvent e)
    {
        int row = table.convertRowIndexToModel( table.getEditingRow() );
        fireEditingStopped();

        //  Invoke the Action

        ActionEvent event = new ActionEvent(
            table,
            ActionEvent.ACTION_PERFORMED,
            "" + row);
        action.actionPerformed(event);
    }

//
//  Implement MouseListener interface
//
    /*
     *  When the mouse is pressed the editor is invoked. If you then then drag
     *  the mouse to another cell before releasing it, the editor is still
     *  active. Make sure editing is stopped when the mouse is released.
     */
    public void mousePressed(MouseEvent e)
    {
        if (table.isEditing()
        &&  table.getCellEditor() == this)
            isButtonColumnEditor = true;
    }

    public void mouseReleased(MouseEvent e)
    {
        if (isButtonColumnEditor
        &&  table.isEditing())
            table.getCellEditor().stopCellEditing();

        isButtonColumnEditor = false;
    }

    public void mouseClicked(MouseEvent e) {}
    public void mouseEntered(MouseEvent e) {}
    public void mouseExited(MouseEvent e) {}
}

如何使JTable单元（链接）可单击

4 个答案: