Java JTable：通过自定义渲染器和数据模型实现行颜色持久化

import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumnModel;
import javax.swing.JTable;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import javax.swing.JScrollPane;

// ... 其他导入

@SuppressWarnings("serial")
class ChangeRowColorPanel extends JPanel {
    private static final String[] COLUMN_NAMES = { "One", "Two", "Three", "Selected" };
    private DefaultTableModel model = new DefaultTableModel(COLUMN_NAMES, 0);
    private JTable table = new JTable(model);

    public ChangeRowColorPanel() {
        // 隐藏最后一列（"Selected"列）
        TableColumnModel columnModel = table.getColumnModel();
        // columnModel.getColumnCount() - 1 获取最后一列的索引
        columnModel.removeColumn(columnModel.getColumn(columnModel.getColumnCount() - 1));

        // 设置自定义渲染器
        table.setDefaultRenderer(Object.class, new RowColorRenderer());
        // 添加鼠标监听器
        table.addMouseListener(new MyMouse());

        // 填充一些示例数据
        int max = 5;
        for (int i = 0; i < max; i++) {
            Object[] row = new Object[COLUMN_NAMES.length];
            for (int j = 0; j < COLUMN_NAMES.length - 1; j++) {
                row[j] = (int) (100 * Math.random());
            }
            row[COLUMN_NAMES.length - 1] = false; // 初始状态为未选中
            model.addRow(row);
        }

        setLayout(new BorderLayout());
        add(new JScrollPane(table));
    }
}

import java.awt.Color;
import java.awt.Component;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableModel;

@SuppressWarnings("serial")
class RowColorRenderer extends DefaultTableCellRenderer {
    private static final Color SELECTED_COLOR = Color.PINK; // 定义选中行的颜色

    public RowColorRenderer() {
        setOpaque(true); // 必须设置为true，否则背景色可能不显示
    }

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,
            int row, int column) {
        // 调用父类方法获取默认的渲染组件
        Component renderer = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);

        TableModel model = table.getModel();
        int selectedColumn = model.getColumnCount() - 1; // 获取“Selected”列的索引

        // 从模型中获取当前行的“Selected”状态
        boolean selected = (boolean) model.getValueAt(row, selectedColumn);

        // 根据状态设置背景色
        Color background = selected ? SELECTED_COLOR : null; // 如果选中，则为粉色，否则为默认
        renderer.setBackground(background);

        // 返回当前渲染器自身，因为我们直接修改了它的背景色
        return this; 
    }
}

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JTable;
import javax.swing.table.TableModel;

class MyMouse extends MouseAdapter {
    @Override
    public void mousePressed(MouseEvent e) {
        JTable table = (JTable) e.getSource();
        TableModel model = table.getModel();

        int selectedRow = table.getSelectedRow(); // 获取当前点击的行索引
        if (selectedRow == -1) { // 如果没有选中行，则直接返回
            return;
        }

        // 获取当前行的“Selected”状态
        boolean selected = (boolean) model.getValueAt(selectedRow, model.getColumnCount() - 1);
        // 切换状态
        model.setValueAt(!selected, selectedRow, model.getColumnCount() - 1);

        table.repaint(); // 通知表格重新绘制，以应用新的颜色
    }
}

import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class TestTableRowColor {
    public static void main(String[] args) {
        // 确保Swing组件在事件调度线程中创建和更新
        SwingUtilities.invokeLater(() -> {
            ChangeRowColorPanel mainPanel = new ChangeRowColorPanel();

            JFrame frame = new JFrame("JTable行颜色持久化示例");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.add(mainPanel);
            frame.pack(); // 根据组件的首选大小调整窗口
            frame.setLocationRelativeTo(null); // 窗口居中显示
            frame.setVisible(true); // 显示窗口
        });
    }
}