如何从 txt 文件中读取单独的部分以显示在 Java GUI 中？

Question

所以 here like this picture I need to show the stats of the tickets I have in a txt file. I've separated the 4 fields using ", " in my file but I don't know how to show them separately in GUI, i.e. for the 4 fields there under Ticket price I need to show the prices which is the 2nd part of every line in my txt file, and for Ticket Amounts the 3rd part of every line from the file. So how do I show them? And I have set an Demo of how should it look like and for every type in the picture I need to show similar lines for every type that's in the txt file. So basically I need to show from "VIP-AC, 30$, 66, 30/10/2020" to this 依此类推（下一行）

这是我到目前为止的代码：

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

读取带分隔符的文本文件中的数据并在 JTable 中显示数据的基本示例如下：

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();
            }
        });
    }
}

以上示例使用“:”作为文件中字符串的单个字符分隔符。

由于您使用两个字符作为分隔符，因此您需要使用稍微复杂一些的正则表达式来进行拆分。所以你的拆分语句将是：

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

如何从 txt 文件中读取单独的部分以显示在 Java GUI 中？

How do I read separate parts from a txt File to show in Java GUI?

java

user-interface

swing

file

jlabel