通过java使用记事本在子目录中打开txt

Question

private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {                                         

    Runtime rt=Runtime.getRuntime();

    String file;
    file = "READTHIS.txt";

    try {
        Process p=rt.exec("notepad " +file);
    } catch (IOException ex) {
        Logger.getLogger(NumberAdditionUI.class.getName()).log(Level.SEVERE, null, ex);
    }
}  

如果有人知道怎么做，那就太好了。

另外一个注意事项是，我希望将上面显示的文件（readthis.txt）包含在实际的java包中，我将把文件放在哪里，我应该如何将java指向它？

我离开java很长一段时间了，所以我忘记了很多东西，所以非常感谢更简单的解释。感谢任何人阅读这和任何帮助将是令人敬畏的。

Answer 1

所以我添加了configbox.java源代码，并在记事本中使jbutton1打开home\doc\readthis.txt。我创建了一个可执行的JAR，通过java-jar racercraft.jar执行JAR的过程如图所示。以我在configbox.java中所做的操作为例，并将其应用于NumberAdditionUI.java中的每个JButtons，确保将FilePath变量更改为要打开的相应文件名。

目录结构：

\home
    Rasercraft.jar
    \docs
        READTHIS.txt

代码：

// imports and other code left out

public class ConfigBox extends javax.swing.JFrame {
    // curDir will hold the absolute path to 'home\'
    String curDir; // add this line

    /**
     * Creates new form ConfigBox
     */
    public ConfigBox() 
    {
        // this is where curDir gets set to the absolute path of 'home/'
        curDir = new File("").getAbsolutePath(); // add this line

        initComponents();
    }

    /*
     * irrelevant code
     */

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
        Runtime rt = Runtime.getRuntime();

        // filePath is set to 'home\docs\READTHIS.txt'
        String filePath = curDir + "\\docs\\READTHIS.txt"; // add this line

        try {
            Process p = rt.exec("notepad " + filePath); // add filePath
        } catch (IOException ex) {
            Logger.getLogger(NumberAdditionUI.class.getName()).log(Level.SEVERE, null, ex);
        }

        // TODO add your handling code here:
    }//GEN-LAST:event_jButton1ActionPerformed

    /*
     * irrelevant code
     */

文件夹层次结构的图像：

代码:
注意-这只适用于Windows。

import java.io.File;
import java.io.IOException;

public class Driver {

    public static void main(String[] args) {
        final String[] FILE_NAMES = {"\\files\\READTHIS.txt",
                                     "\\files\\sub-files\\Help.txt",
                                     "\\files\\sub-files\\Config.txt"
                                    };
        Runtime rt = Runtime.getRuntime();

        // get the absolute path of the directory
        File cwd = new File(new File("").getAbsolutePath());

        // iterate over the hard-coded file names opening each in notepad
        for(String file : FILE_NAMES) {
            try {
                Process p = rt.exec("notepad " + cwd.getAbsolutePath() + file);
            } catch (IOException ex) {
                // Logger.getLogger(NumberAdditionUI.class.getName())
                // .log(Level.SEVERE, null, ex);
            }
        }

    }
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;


public class Driver extends JFrame implements ActionListener {
    JFileChooser fileChooser;  // the file chooser
    JButton openButton;  // button used to open the file chooser
    File file; // used to get the absolute path of the file

    public Driver() {
        this.fileChooser = new JFileChooser();
        this.openButton = new JButton("Open");

        this.openButton.addActionListener(this);

        // add openButton to the JFrame
        this.add(openButton);

        // pack and display the JFrame
        this.pack();
        this.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        // handle open button action.
        if (e.getSource() == openButton) {
            int returnVal = fileChooser.showOpenDialog(Driver.this);

            if (returnVal == JFileChooser.APPROVE_OPTION) {
                // from your code
                Runtime rt = Runtime.getRuntime();

                try {
                    File file = fileChooser.getSelectedFile();
                    String fileAbsPath = file.getAbsolutePath();

                    Process p = rt.exec("notepad " + fileAbsPath);                        
                } catch (IOException ex) {
                    // Logger.getLogger(NumberAdditionUI.class.getName())
                    // .log(Level.SEVERE, null, ex);
                }
            } else {
                System.exit(1);
            }
        }

    }

    public static void main(String args[]) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                Driver driver = new Driver();
            }
        });
    }

}

如何用可执行JAR包含文本文件？

创建包含外部文件的可运行jar？

在jar文件中包含文本文件并读取它？