在 Java 中设置文件创建时间戳

2022-09-01 16:44:18

我知道设置创建时间戳在Java中不存在,因为Linux没有它,但是有没有办法在Java中设置文件(Windows)的创建时间戳?我有一个基本的修改时间戳编辑器,我就在这里。

import java.io.*;
import java.util.*;
import java.text.*;
import javax.swing.*;

public class chdt{
    static File file;
    static JFrame frame = new JFrame("Input a file to change");
    public static void main(String[] args) {
        try{

            final JFileChooser fc = new JFileChooser();
            fc.setMultiSelectionEnabled(false);

            //BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
            //System.out.println("Enter file name with extension:");
            //String str = bf.readLine();
            JOptionPane.showMessageDialog(null, "Input a file to change.");
            frame.setSize(300, 200);

            frame.setVisible(true);

            int retVal = fc.showOpenDialog(frame);
            if (retVal == JFileChooser.APPROVE_OPTION) {
                file = fc.getSelectedFile();
                frame.setVisible(false);
            } else {
                JOptionPane.showMessageDialog(null, "3RR0RZ!  You didn't input a file.");
                System.exit(0);
            }

            //System.out.println("Enter last modified date in 'dd-mm-yyyy-hh-mm-ss' format:");
            //String strDate = bf.readLine();
            String strDate = JOptionPane.showInputDialog("Enter last modified date in 'dd-mm-yyyy-hh-mm-ss' format:");

            SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy-HH-mm-ss");
            Date date = sdf.parse(strDate);

            if (file.exists()){
                file.setLastModified(date.getTime());
                JOptionPane.showMessageDialog(null, "Modification is successful!");
            }
            else{
                JOptionPane.showMessageDialog(null, "File does not exist!  Did you accidentally it or what?");
            }
        }
        catch(Exception e){
            e.printStackTrace();
            JOptionPane.showMessageDialog(null, "3RR0RZ");
        }
    }
}

答案 1

以下是您在Java 7中使用nio框架执行的操作:

public void setFileCreationDate(String filePath, Date creationDate) throws IOException{

    BasicFileAttributeView attributes = Files.getFileAttributeView(Paths.get(filePath), BasicFileAttributeView.class);
    FileTime time = FileTime.fromMillis(creationDate.getTime());
    attributes.setTimes(time, time, time);

}

方法参数分别设置上次修改时间、上次访问时间和创建时间。BasicFileAttributeView.setTimes(FileTime, FileTime, FileTime)


答案 2

Java 7 开始,您可以使用 java.nio.file.Files.setAttribute 和属性:creationTime

Path p = Paths.get("C:\\Users\\first.last\\test.txt");
try {
    Calendar c = Calendar.getInstance();
    c.set(2010, Calendar.MARCH, 20);
    Files.setAttribute(p, "creationTime", FileTime.fromMillis(c.getTimeInMillis()));
} catch (IOException e) {
    System.err.println("Cannot change the creation time. " + e);
}

其他属性可以在这里找到:

Name                  Type
-------------------------------
"lastModifiedTime"    FileTime
"lastAccessTime"      FileTime
"creationTime"        FileTime
"size"                Long
"isRegularFile"       Boolean
"isDirectory"         Boolean
"isSymbolicLink"      Boolean
"isOther"             Boolean
"fileKey"             Object