Java-Swing 在 jtable 的单元格中添加多行

Question

我想在 jtable 行的同一个单元格中插入多个字符串 line.This 是我将数据添加到 jtable 的方式

       String Model,Brand,Serial;

       String itemdetails=Model+Brand+Serial

       model.addRow(new Object[]{itemdetails,amountText.getText()});

这是问题所在，在单行中获取输出，但我希望在 jtbale 的单元格中这样输出。

      Model                    //it is string coming from database
      Brand                      //it is string coming from database
      Serial                   //it is string coming from database

我已经试过了，但它只能在双引号内使用数据，不能使用字符串。

                  "<html>lineOne <br/> lineTwo </html>"

Answer 1

您的 for 循环错误地关闭了：

    DefaultTableModel model = (DefaultTableModel) jt.getModel();
    int i; 
    for(i=0; i<model.getRowCount(); i++){ 
    String itemdetails=model+"\n"+brand; 
    System.out.println(itemdetails);
    jt.setRowHeight(30);
    model.addRow(new Object[]{i+1,itemdetails,amountText.getText()}); }

Answer 2

所以，无需做任何特别的事情，我就可以让 <html>...<br>...</html> 正常工作...

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableModel;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            DefaultTableModel model = new DefaultTableModel(0, 1);
            model.addRow(new String[]{
                "<html>My teacher took my iPod.<br>She said they had a rule;<br>I couldn't bring it into class<br>or even to the school.</html>"
            });
            model.addRow(new String[]{
                "<html>She said she would return it;<br>I'd have it back that day.<br>But then she tried my headphones on<br>and gave a click on Play.</html>"
            });
            model.addRow(new String[]{
                "<html>She looked a little startled,<br>"
                + "but after just a while<br>"
                + "she made sure we were occupied<br>"
                + "and cracked a wicked smile.<br>"
            });
            model.addRow(new String[]{
                "<html>Her body started swaying.<br>"
                + "Her toes began to tap.<br>"
                + "She started grooving in her seat<br>"
                + "and rocking to the rap.</html>"
            });
            model.addRow(new String[]{
                "<html>My teacher said she changed her mind.<br>"
                + "She thinks it's now okay<br>"
                + "to bring my iPod into class.<br>"
                + "She takes it every day.</html>"
            });

            setLayout(new GridBagLayout());

            JTable table = new JTable(model);
            table.setRowHeight(75);
            add(new JScrollPane(table));

        }

    }

}

也许您的代码中还有其他内容，您没有向我们展示，这导致了问题...

Updated with "dynamic" example

这已经超越了最初的问题，但是，TableModel 表示它支持的数据，它提供了 JTable 显示它的结构。

因此，给定一堆 "disconnected" 值，根据您的要求，TableModel 将 "sew" 它们放在一起。

以下示例简单地将上一首诗的每一行拆分为一个数组，其中每一行代表一个元素。

然后将其再次包裹，因此这首诗的每一节都是一行行...

String data[][] = {
            {"My teacher took my iPod.", "She said they had a rule;", "I couldn't bring it into class", "or even to the school."},
            {"She said she would return it;", "I'd have it back that day.", "But then she tried my headphones on", "and gave a click on Play."}, 
            etc...

该示例然后使用自定义 TableModel，当询问单元格的值时，它采用给定的 "section" 并从每一行构建一个 String，包装到基于 <html> 的 String.

此外，您需要单击“添加”按钮添加每个新行才能显示

public class TestPane extends JPanel {

    private MyTableModel model;
    private int index = 0;
    public TestPane() {
        String data[][] = {
            {"My teacher took my iPod.", "She said they had a rule;", "I couldn't bring it into class", "or even to the school."},
            {"She said she would return it;", "I'd have it back that day.", "But then she tried my headphones on", "and gave a click on Play."},
            {"She looked a little startled,", "but after just a while", "she made sure we were occupied", "and cracked a wicked smile.", ""},
            {"Her body started swaying.", "Her toes began to tap.", "She started grooving in her seat", "and rocking to the rap."},
            {"My teacher said she changed her mind.", "She thinks it's now okay", "to bring my iPod into class.", "She takes it every day."}
        };

        setLayout(new BorderLayout());

        model = new MyTableModel();

        JTable table = new JTable(model);
        table.setRowHeight(75);
        add(new JScrollPane(table));

        JButton add = new JButton("Add");
        add.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (index < data.length) {
                    model.addRow(data[index]);
                }
                index++;
                if (index >= data.length) {
                    add.setEnabled(false);
                }
            }
        });

        add(add, BorderLayout.SOUTH);
    }

    public class MyTableModel extends AbstractTableModel {

        private List<String[]> rowData;

        public MyTableModel() {
            rowData = new ArrayList<>(25);
        }

        public void addRow(String[] data) {
            rowData.add(data);
            fireTableRowsInserted(rowData.size() - 1, rowData.size() - 1);
        }

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

        @Override
        public Class<?> getColumnClass(int columnIndex) {
            return String.class;
        }

        @Override
        public Object getValueAt(int rowIndex, int columnIndex) {
            Object value = null;
            switch (columnIndex) {
                case 0:
                    String[] data = rowData.get(rowIndex);
                    StringJoiner joiner = new StringJoiner("<br>", "<html>", "</html>");
                    for (String text : data) {
                        joiner.add(text);
                    }
                    value = joiner.toString();
                    break;
            }
            return value;
        }

        @Override
        public int getRowCount() {
            return rowData.size();
        }

    }

}

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