数据表格

缺乏、安全感 2021-12-16 06:21 272阅读 0赞

package testDemo;
    /**
    * @author 作者 E-mail:
    * @version 创建时间：2019年6月5日 上午8:44:42
    * 类说明
    */
    
    import java.awt.BorderLayout;
    import java.awt.Color;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.MouseAdapter;
    import java.awt.event.MouseEvent;
    
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.JScrollPane;
    import javax.swing.JTable;
    
    @SuppressWarnings("serial")
    public class SimpleTableDemo extends JPanel {
        private boolean DEBUG = true;
    
        public SimpleTableDemo() {
            super(new BorderLayout());
    
            //创建表头
            String[] columnNames = { "First Name", "Last Name", "Sport",
                    "# of Years", "Vegetarian" };
    
            //创建显示数据
            Object[][] data = {
                    { "Kathy", "Smith", "Snowboarding", new Integer(5),
                            new Boolean(false) },
                    { "John", "Doe", "Rowing", new Integer(3), new Boolean(true) },
                    { "Sue", "Black", "Knitting", new Integer(2),
                            new Boolean(false) },
                    { "Jane", "White", "Speed reading", new Integer(20),
                            new Boolean(true) },
                    { "Joe", "Brown", "Pool", new Integer(10), new Boolean(false) } };
            
            /*
             * JTable还提供了一个重载的构造方法,传入两个Vector
             * JTable(Vector rowData, Vector columnNames)
             * 
             */
            
            final JTable table = new JTable(data, columnNames);
        
            table.setBackground(Color.YELLOW);
            
            //table.setPreferredScrollableViewportSize(new Dimension(500, 0));
            
            if (DEBUG) {
                table.addMouseListener(new MouseAdapter() {
                    public void mouseClicked(MouseEvent e) {
                        printDebugData(table);
                    }
                });
            }
    
            // Create the scroll pane and add the table to it.
            //这也是官方建议使用的方式，否则表头不会显示，需要单独获取到TableHeader自己手动地添加显示
            JScrollPane scrollPane = new JScrollPane(table);
    
            add(scrollPane);
                
            
            JPanel panel2 = new JPanel();
            this.add(panel2,BorderLayout.SOUTH);
            JButton btn1 = new JButton("表格填充整个视图");
            JButton btn2 = new JButton("表格不添加整个视图(默认不填充)");
            panel2.add(btn1);
            panel2.add(btn2);
            
            btn1.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    //设置表格填充整个视图,在默认情况下,如果表格的大小小于视图(窗体),你会发现下面的内容是其他颜色,可以将上面的yellow去掉做个比较
                    table.setFillsViewportHeight(true);
                }
            });
            
            btn2.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    table.setFillsViewportHeight(false);
                }
            });
            
        }
    
        private void printDebugData(JTable table) {
            int numRows = table.getRowCount();
            int numCols = table.getColumnCount();
            javax.swing.table.TableModel model = table.getModel();
    
            System.out.println("Value of data: ");
            for (int i = 0; i < numRows; i++) {
                System.out.print("    row " + i + ":");
                for (int j = 0; j < numCols; j++) {
                    System.out.print("  " + model.getValueAt(i, j));
                }
                System.out.println();
            }
            System.out.println("--------------------------");
        }
    
        /**
         * Create the GUI and show it. For thread safety, this method should be
         * invoked from the event-dispatching thread.
         */
        private static void createAndShowGUI() {
            // Create and set up the window.
            JFrame frame = new JFrame("SimpleTableDemo");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
            // Create and set up the content pane.
            SimpleTableDemo newContentPane = new SimpleTableDemo();
            newContentPane.setOpaque(true); // content panes must be opaque
            frame.setContentPane(newContentPane);
    
            // Display the window.
            //frame.pack();
            frame.setSize(800, 600);
            frame.setVisible(true);
        }
    
        public static void main(String[] args) {
            // Schedule a job for the event-dispatching thread:
            // creating and showing this application's GUI.
            javax.swing.SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    createAndShowGUI();
                }
            });
        }
    }

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