java swing 显示ip地址输入框 端口号输入框实现文件传输

以下是一个简单的Java Swing程序，用于实现文件传输的IP地址输入框和端口号输入框：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

public class FileTransfer extends JFrame implements ActionListener {

    private JTextField ipField;
    private JTextField portField;
    private JButton sendButton;
    private JButton chooseButton;
    private JFileChooser fileChooser;

    public FileTransfer() {
        setTitle("File Transfer");
        setSize(400, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        JPanel topPanel = new JPanel();
        topPanel.setLayout(new GridLayout(2, 2));
        JLabel ipLabel = new JLabel("IP Address:");
        ipField = new JTextField();
        JLabel portLabel = new JLabel("Port:");
        portField = new JTextField();
        topPanel.add(ipLabel);
        topPanel.add(ipField);
        topPanel.add(portLabel);
        topPanel.add(portField);
        add(topPanel, BorderLayout.NORTH);

        JPanel centerPanel = new JPanel();
        centerPanel.setLayout(new GridLayout(1, 2));
        chooseButton = new JButton("Choose File...");
        chooseButton.addActionListener(this);
        centerPanel.add(chooseButton);
        sendButton = new JButton("Send File");
        sendButton.addActionListener(this);
        centerPanel.add(sendButton);
        add(centerPanel, BorderLayout.CENTER);

        fileChooser = new JFileChooser();

        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == chooseButton) {
            int returnVal = fileChooser.showOpenDialog(this);
            if (returnVal == JFileChooser.APPROVE_OPTION) {
                File file = fileChooser.getSelectedFile();
                // Do something with the file
            }
        } else if (e.getSource() == sendButton) {
            String ipAddress = ipField.getText();
            int portNumber = Integer.parseInt(portField.getText());
            File file = fileChooser.getSelectedFile();
            try {
                Socket socket = new Socket(ipAddress, portNumber);
                OutputStream outputStream = socket.getOutputStream();
                FileInputStream fileInputStream = new FileInputStream(file);
                byte[] buffer = new byte[1024];
                int bytesRead;
                while ((bytesRead = fileInputStream.read(buffer)) != -1) {
                    outputStream.write(buffer, 0, bytesRead);
                }
                fileInputStream.close();
                outputStream.close();
                socket.close();
                JOptionPane.showMessageDialog(this, "File sent successfully!");
            } catch (IOException ex) {
                JOptionPane.showMessageDialog(this, "Error sending file: " + ex.getMessage());
            }
        }
    }

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

这个程序创建了一个窗口，包含一个IP地址输入框、一个端口号输入框、一个“Choose File...”按钮和一个“Send File”按钮。当用户点击“Choose File...”按钮时，程序打开一个文件选择器，允许用户选择要发送的文件。当用户点击“Send File”按钮时，程序使用Socket连接到指定的IP地址和端口号，并将文件发送到远程主机。

请注意，此程序仅是一个示例，并不包含完整的错误处理和安全功能。在实际应用中，您需要添加更多的错误处理和安全检查，以确保文件传输的安全和可靠。