如何從 txt 文件中讀取單獨的部分以在 Java GUI 中顯示？

Question

所以像這張圖片一樣，我需要在txt文件中顯示我擁有的門票的統計信息。 我在文件中使用“,”分隔了 4 個字段，但我不知道如何在 GUI 中分別顯示它們，即對於 Ticket price 下的 4 個字段，我需要顯示價格，這是每個字段的第二部分我的 txt 文件中的行，以及文件中每行的第 3 部分的票證金額。 那么我如何向他們展示呢？ 我已經設置了一個演示，它應該是什么樣子，對於圖片中的每種類型，我需要為txt文件中的每種類型顯示類似的行。 所以基本上我需要從“VIP-AC, 30$, 66, 30/10/2020”到這個等等（對於下一行）

這是我的代碼，直到現在：

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSeparator;
import javax.swing.border.EmptyBorder;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import java.awt.Color;

public class TicketStats extends JFrame {

private JPanel contentPane;

public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                TicketStats frame = new TicketStats();
                frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

public TicketStats() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 1016, 566);
    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    setContentPane(contentPane);
    
    JButton backButton = new JButton("Back");
    backButton.setBounds(846, 11, 144, 54);
    backButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            dispose();
            User user = new User();
            user.setVisible(true);
        }
    });
    contentPane.setLayout(null);
    backButton.setFont(new Font("Tahoma", Font.PLAIN, 16));
    contentPane.add(backButton);
    
    JLabel lblNewLabel = new JLabel("Ticket Info");
    lblNewLabel.setFont(new Font("Tahoma", Font.BOLD, 36));
    lblNewLabel.setBounds(385, 66, 227, 44);
    contentPane.add(lblNewLabel);
    
    JLabel lblNewLabel_1 = new JLabel("Ticket Type");
    lblNewLabel_1.setFont(new Font("Tahoma", Font.PLAIN, 16));
    lblNewLabel_1.setBounds(183, 164, 108, 25);
    contentPane.add(lblNewLabel_1);
    
    JLabel lblNewLabel_2 = new JLabel("Ticket Price");
    lblNewLabel_2.setFont(new Font("Tahoma", Font.PLAIN, 16));
    lblNewLabel_2.setBounds(358, 164, 108, 25);
    contentPane.add(lblNewLabel_2);
    
    JLabel lblNewLabel_3 = new JLabel("Tickets Left");
    lblNewLabel_3.setFont(new Font("Tahoma", Font.PLAIN, 16));
    lblNewLabel_3.setBounds(535, 164, 108, 25);
    contentPane.add(lblNewLabel_3);
    
    JLabel lblNewLabel_4 = new JLabel("Match Date");
    lblNewLabel_4.setFont(new Font("Tahoma", Font.PLAIN, 16));
    lblNewLabel_4.setBounds(699, 164, 108, 25);
    contentPane.add(lblNewLabel_4);
    
    JLabel lblNewLabel_5 = new JLabel("VIP-AC");
    lblNewLabel_5.setFont(new Font("Tahoma", Font.PLAIN, 12));
    lblNewLabel_5.setBounds(183, 228, 76, 14);
    contentPane.add(lblNewLabel_5);
    
    JLabel lblNewLabel_6 = new JLabel("30$");
    lblNewLabel_6.setFont(new Font("Tahoma", Font.PLAIN, 12));
    lblNewLabel_6.setBounds(358, 228, 76, 14);
    contentPane.add(lblNewLabel_6);
    
    JLabel lblNewLabel_7 = new JLabel("66");
    lblNewLabel_7.setFont(new Font("Tahoma", Font.PLAIN, 12));
    lblNewLabel_7.setBounds(535, 228, 82, 14);
    contentPane.add(lblNewLabel_7);
    
    JLabel lblNewLabel_8 = new JLabel("30/10/2020");
    lblNewLabel_8.setBounds(699, 228, 76, 14);
    contentPane.add(lblNewLabel_8);
    
    File file = new File("Ticket.txt");
    try(BufferedReader reader = new BufferedReader(new FileReader(file))) {
        StringBuilder sb = new StringBuilder();
        String text;
        
        while((text = reader.readLine()) != null) {
            sb.append(text).append(", ");
        }
    } catch (IOException ioe) {
        ioe.printStackTrace();
    } 
    
    JSeparator separator = new JSeparator();
    separator.setBounds(172, 201, 621, 2);
    contentPane.add(separator);
    
    JSeparator separator1 = new JSeparator();
    separator1.setForeground(Color.BLACK);
    separator1.setOrientation(SwingConstants.VERTICAL);
    separator1.setBounds(664, 164, 2, 283);
    contentPane.add(separator1);
    
    JSeparator separator_1 = new JSeparator();
    separator_1.setOrientation(SwingConstants.VERTICAL);
    separator_1.setForeground(Color.BLACK);
    separator_1.setBounds(487, 164, 2, 283);
    contentPane.add(separator_1);
    
    JSeparator separator_2 = new JSeparator();
    separator_2.setOrientation(SwingConstants.VERTICAL);
    separator_2.setForeground(Color.BLACK);
    separator_2.setBounds(314, 164, 2, 283);
    contentPane.add(separator_2);
    
}
}

Answer 1

讀取分隔文本文件中的數據並在 JTable 中顯示數據的基本示例如下：

import java.awt.*;
import java.io.*;
import javax.swing.*;
import javax.swing.table.*;

public class TableFromFile extends JPanel
{
    public TableFromFile()
    {
        setLayout( new BorderLayout() );

        JTable table = new JTable( getTableModel() );
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane( table );
        add( scrollPane );
    }

    private TableModel getTableModel()
    {
        String delimiter = ":";
        DefaultTableModel model = new DefaultTableModel();

        try
        {
            BufferedReader reader = getFileReader();

            //  First line will contain the column names

            String line = reader.readLine();
            model.setColumnIdentifiers( line.split(delimiter) );

            //  Remaining lines in the file will be the data

            while ((line = reader.readLine()) != null)
            {
                model.addRow( line.split(delimiter) );
            }

            reader.close();
        }
        catch(Exception e) { System.out.println(e); }


        return model;
    }

    private BufferedReader getFileReader()
    {
        //  Create data to simulate reading data from a file

        String data =
            "Letter:Number\n" +
            "A:1\n" +
            "B:2\n" +
            "C:3";

        BufferedReader reader = new BufferedReader( new StringReader( data ) );

        //  In your real application the data would come from a file

        //Reader reader = new BufferedReader( new FileReader(...) );

        return reader;
    }

    private static void createAndShowUI()
    {
        JFrame frame = new JFrame("Table From File");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add( new TableFromFile() );
        frame.pack();
        frame.setLocationRelativeTo( null );
        frame.setVisible( true );
    }

    public static void main(String[] args)
    {
        EventQueue.invokeLater(new Runnable()
        {
            public void run()
            {
                createAndShowUI();
            }
        });
    }
}

上面的示例使用“:”作為文件中字符串的單字符分隔符。

由於您使用兩個字符作為分隔符，因此您需要使用稍微復雜的正則表達式來進行拆分。 所以你的拆分語句將是：

model.addRow( line.split(":\\s") );