Java 如何使用自定义JTable单元编辑器和单元渲染器

我已经创建了一个JTable，它带有一个自定义表渲染器和自定义单元编辑器，可以在图像中给出结果

我使用扩展了JPanel的单独类创建了第一个表单元格中显示的面板。并将表值添加为

        tbl.setCellEditor(new customCell());
        tbl.getColumnModel().getColumn(0).setCellRenderer(new customCell());

        DefaultTableModel dtm = (DefaultTableModel) tbl.getModel();

        Vector v = new Vector();
        v.add(new Panel());
        v.add("Test");
        dtm.addRow(v);

        v.clear();
        v.add(new Panel());
        v.add("Test 2");
        dtm.addRow(v);

这是我的table自定义类，用于创建此表

class customCell extends DefaultTableModel implements TableCellRenderer, TableCellEditor {

        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            Panel p = new Panel();            
            table.setRowHeight(row, p.getHeight());
            return p;
        }

        public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {

            return new Panel();
        }

        public Object getCellEditorValue() {
            return "";
        }

        public boolean isCellEditable(EventObject anEvent) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        public boolean shouldSelectCell(EventObject anEvent) {
            return true;
        }

        @Override
        public boolean isCellEditable(int rowIndex, int columnIndex) {
            return true;
        }

        public boolean stopCellEditing() {
            return true;
        }

        public void cancelCellEditing() {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        public void addCellEditorListener(CellEditorListener l) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        public void removeCellEditorListener(CellEditorListener l) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
    }

---

我的问题是，面板的显示与我预期的一样，我无法在文本字段中键入或更改复选框或单击按钮。请告诉我如何解决这个问题。

我强烈建议重用默认表呈现器和编辑器中提供的功能，因为您的代码有很多问题

请拆分编辑器、渲染器和表模型。把他们都安排在同一个班上真是奇怪

对于渲染器，不要每次都创建

组件的新实例。相反，重用相同的组件，只需在
getTableCellRenderComponent
方法中修改该
组件

编辑器

组件也一样

扩展默认编辑器，而不是使用

UnsupportedOperationException

s或只返回空

String

s来实现方法

为了支持我的第四点，请引用以下内容：

如果要指定除文本字段、复选框或组合框以外的编辑器，该怎么办？由于DefaultCellEditor不支持其他类型的组件，您必须做更多的工作。您需要创建一个实现TableCellEditor接口的类。AbstractCellEditor类是一个很好的超类。它实现了TableCellEditor的超级界面CellEditor，省去了实现单元格编辑器所需的事件触发代码的麻烦

您的单元编辑器类至少需要定义两个方法-getCellEditorValue和getTableCellEditorComponent。CellEditor所需的getCellEditorValue方法返回单元格的当前值。TableCellEditor所需的getTableCellEditorComponent方法应配置并返回要用作编辑器的组件

如文中所述，您必须实现事件触发代码：

省去了实现单元编辑器所需的事件触发代码的麻烦

---

你显然忽视了这一点。因此，我建议从

AbstractCellEditor

开始，而不是从头开始实现界面

必须为已经可见的

JPanel

添加适当的

LayoutManager

，

可编辑/不可编辑的属性

让我们享受

import java.awt.*;
import java.awt.event.*;
import java.util.EventObject;
import javax.swing.*;
import javax.swing.table.*;

public class PanelInTable {

    private JFrame frame;
    private JTable compTable = null;
    private PanelTableModel compModel = null;
    private JButton addButton = null;

    public static void main(String args[]) {
        try {
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
            //UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (Exception fail) {
        }
        SwingUtilities.invokeLater(() -> {
            new PanelInTable().makeUI();
        });
    }

    public void makeUI() {
        compTable = CreateCompTable();
        JScrollPane CompTableScrollpane = new JScrollPane(compTable, 
                JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        JPanel bottomPanel = CreateBottomPanel();
        frame = new JFrame("Comp Table Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(CompTableScrollpane, BorderLayout.CENTER);
        frame.add(bottomPanel, BorderLayout.SOUTH);
        frame.setPreferredSize(new Dimension(800, 400));
        frame.setLocation(150, 150);
        frame.pack();
        frame.setVisible(true);
    }

    public JTable CreateCompTable() {
        compModel = new PanelTableModel();
        compModel.addRow();
        JTable table = new JTable(compModel);
        table.setRowHeight(new CompCellPanel().getPreferredSize().height);
        table.setTableHeader(null);
        PanelCellEditorRenderer PanelCellEditorRenderer = new PanelCellEditorRenderer();
        table.setDefaultRenderer(Object.class, PanelCellEditorRenderer);
        table.setDefaultEditor(Object.class, PanelCellEditorRenderer);
        return table;
    }

    public JPanel CreateBottomPanel() {
        addButton = new JButton("Add Comp");
        addButton.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent ae) {
                Object source = ae.getSource();
                if (source == addButton) {
                    compModel.addRow();
                }
            }
        });
        JPanel panel = new JPanel(new GridBagLayout());
        panel.add(addButton);
        return panel;
    }
}

class PanelCellEditorRenderer extends AbstractCellEditor implements 
        TableCellRenderer, TableCellEditor {

    private static final long serialVersionUID = 1L;
    private CompCellPanel renderer = new CompCellPanel();
    private CompCellPanel editor = new CompCellPanel();

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, 
            boolean isSelected, boolean hasFocus, int row, int column) {
        renderer.setComp((Comp) value);
        return renderer;
    }

    @Override
    public Component getTableCellEditorComponent(JTable table, Object value, 
            boolean isSelected, int row, int column) {
        editor.setComp((Comp) value);
        return editor;
    }

    @Override
    public Object getCellEditorValue() {
        return editor.getComp();
    }

    @Override
    public boolean isCellEditable(EventObject anEvent) {
        return true;
    }

    @Override
    public boolean shouldSelectCell(EventObject anEvent) {
        return false;
    }
}

class PanelTableModel extends DefaultTableModel {

    private static final long serialVersionUID = 1L;

    @Override
    public int getColumnCount() {
        return 1;
    }

    public void addRow() {
        super.addRow(new Object[]{new Comp(0, 0, "", "")});
    }
}

class Comp {

    public int type;
    public int relation;
    public String lower;
    public String upper;

    public Comp(int type, int relation, String lower, String upper) {
        this.type = type;
        this.relation = relation;
        this.lower = lower;
        this.upper = upper;
    }
}

class CompCellPanel extends JPanel {

    private static final long serialVersionUID = 1L;
    private JLabel labelWith = new JLabel("With ");
    private JComboBox typeCombo = new JComboBox(new Object[]
    {"height", "length", "volume"});
    private JComboBox relationCombo = new JComboBox(new Object[]
    {"above", "below", "between"});
    private JTextField lowerField = new JTextField();
    private JLabel labelAnd = new JLabel(" and ");
    private JTextField upperField = new JTextField();
    private JButton removeButton = new JButton("remove");

   public CompCellPanel() {
        setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
        relationCombo.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                enableUpper(relationCombo.getSelectedIndex() == 2);
            }
        });
        enableUpper(false);
        removeButton.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                JTable table = (JTable) SwingUtilities.getAncestorOfClass(
                        JTable.class, (Component) e.getSource());
                int row = table.getEditingRow();
                table.getCellEditor().stopCellEditing();
                ((DefaultTableModel) table.getModel()).removeRow(row);
            }
        });
        add(labelWith);
        add(typeCombo);
        add(relationCombo);
        add(lowerField);
        add(labelAnd);
        add(upperField);
        add(Box.createHorizontalStrut(100));
        add(removeButton);
    }

    private void enableUpper(boolean enable) {
        labelAnd.setEnabled(enable);
        upperField.setEnabled(enable);
    }

    public void setComp(Comp Comp) {
        typeCombo.setSelectedIndex(Comp.type);
        relationCombo.setSelectedIndex(Comp.relation);
        lowerField.setText(Comp.lower);
        upperField.setText(Comp.upper);
        enableUpper(Comp.relation == 2);
    }

    public Comp getComp() {
        return new Comp(typeCombo.getSelectedIndex(), 
                relationCombo.getSelectedIndex(), 
                lowerField.getText(), upperField.getText());
    }
}

停止编辑属于编辑器，而不是面板。另外，从外部actionListener搞乱模型是。。。有争议；-）谢谢你的精彩捕捉，顺便说一句，这段代码被你的诚实修改了3次以上，我试着移动并使用Rob制作的JTable中的动作（我认为没有更好、更自由、更简单的了），没有发生类似的更改和事件，你为什么要扩展AbstractCellEditor@Radu西蒙涅斯库因为。。。。。。。冰熊？？：-），我认为这是最简单、紧凑的代码，例如在SSCCE forn中，粘贴到public forumplease中，请使用小写变量名，这是非常令人困惑的。