java - 如何在记事本文件中打印控制台输出？

Question

我想知道如何将控制台输出保存在记事本文件中？

import java.awt.EventQueue;

public class HLS1 {

    private JFrame frmHttpsLiveStreaming;
    private JTextField textField;
    // file is accessed to the whole class
    private File file;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    HLS1 window = new HLS1();
                    window.frmHttpsLiveStreaming.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public HLS1() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    private void initialize() {
        frmHttpsLiveStreaming = new JFrame();
        frmHttpsLiveStreaming.setTitle("HTTPS Live Streaming");
        frmHttpsLiveStreaming.setBounds(100, 100, 494, 112);
        frmHttpsLiveStreaming.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frmHttpsLiveStreaming.getContentPane().setLayout(null);

        JButton btnBrowse = new JButton("Open File");
        btnBrowse.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {

                System.out.println("Argument:" + arg0);
                JFileChooser fs = new JFileChooser(new File("c:\\"));
                fs.setDialogTitle("Open a file");
                fs.setFileFilter(new FileTypeFilter(".m3u8", ""));
                fs.setFileFilter(new FileTypeFilter(".m3u", ""));
                fs.showOpenDialog(null);
                file = fs.getSelectedFile();
                textField.setText(file.getAbsolutePath());

            }
        });
        btnBrowse.setBounds(336, 7, 89, 23);
        frmHttpsLiveStreaming.getContentPane().add(btnBrowse);

        JButton btnNewButton_1 = new JButton("Clear");
        btnNewButton_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {

                textField.setText("");

            }
        });
        btnNewButton_1.setBounds(237, 39, 89, 23);
        frmHttpsLiveStreaming.getContentPane().add(btnNewButton_1);

        JLabel lblUrl = new JLabel("URL");
        lblUrl.setBounds(83, 11, 24, 14);
        frmHttpsLiveStreaming.getContentPane().add(lblUrl);

        textField = new JTextField();
        textField.setBounds(116, 11, 210, 19);
        frmHttpsLiveStreaming.getContentPane().add(textField);
        textField.setColumns(10);

        JButton btnNewButton = new JButton("Check");
        btnNewButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {

                try {
                    List<String> fileArray = new ArrayList<String>();
                    List<String> errors = new ArrayList<String>();
                    String regex = "^(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]";
                    Scanner s = null;

                    if(textField.getText().matches(regex)){
                        URL url = new URL(textField.getText());
                        s= new Scanner(url.openStream());
                    }else{
                        s = new Scanner(new BufferedReader(new FileReader(file)));
                    }
                    if(s != null){
                        while(s.hasNextLine()){
                            String line = s.nextLine();
                            if(!line.isEmpty()){
                                fileArray.add(line);

                            }
                            System.out.println(line);
                        }
                    }
                    s.close();

                    errors.addAll(validateEXTM3U(fileArray));


                    for (String error : errors) {
                        System.out.println(error);

                    }                       

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
        btnNewButton.setBounds(126, 39, 89, 23);
        frmHttpsLiveStreaming.getContentPane().add(btnNewButton);




    }

    private List<String> validateEXTM3U(List<String> fileArray){
        List<String> errors = new ArrayList<String>();
        String tag = fileArray.get(0);
        if(!tag.equals("#EXTM3U")){
            errors.add("First line in the menifest file is not #EXTM3U");
        }

        return errors;
    }

}

Answer 1

这可能是一个 hacky 解决方案，但如果您在 Windows 或 Linux 中运行，那么您可以通过管道/重定向它。

java HLS1 > notepad.txt

如果不是您正在寻找的东西，那么为什么不使用名为 log4j 的东西呢？