import java.io.File;
import java.io.IOException;
import java.util.Date;

public class FileChange {
    public static void main(String[] args) throws IOException {
        File file = new File("copyfile");
        file.createNewFile();
        Date fileTime = new Date(file.lastModified()); //获取最后修改时间
        System.out.println(fileTime.toString());

        System.out.println(file.setLastModified(System.currentTimeMillis()));
        fileTime= new Date(file.lastModified());
        System.out.println(fileTime.toString());
    }
}