我有一个程序,我想从检测到的 USB 驱动器(可移动存储,如 USB)上运行,这是通过创建两个类来完成的:external.java 和 DetectDrive.java,如下所示:
外部.java
public class external
{
public static void main(String args[]) throws InterruptedException
{
DetectDrive d = new DetectDrive();
String DetectDrive = d.USBDetect();
BufferedWriter fileOut;
String filePath = DetectDrive;
System.out.println(filePath);
try
{
fileOut = new BufferedWriter(new FileWriter("F:\\external.bat"));
fileOut.write("cd "+ filePath +"\n");
fileOut.write("external.exe"+"\n");
fileOut.close(); //close the output stream after all output is done
Runtime rt = Runtime.getRuntime();
Process p = rt.exec("cmd /c start" +DetectDrive+ "\\external.bat");
p.waitFor();
} catch (IOException e){
e.printStackTrace();
}
}
}
DetectDrive.java
import java.io.*;
import java.util.*;
import javax.swing.filechooser.FileSystemView;
public class DetectDrive
{
public String USBDetect()
{
String driveLetter = "";
FileSystemView fsv = FileSystemView.getFileSystemView();
File[] f = File.listRoots();
for (int i = 0; i < f.length; i++)
{
String drive = f[i].getPath();
String displayName = fsv.getSystemDisplayName(f[i]);
String type = fsv.getSystemTypeDescription(f[i]);
boolean isDrive = fsv.isDrive(f[i]);
boolean isFloppy = fsv.isFloppyDrive(f[i]);
boolean canRead = f[i].canRead();
boolean canWrite = f[i].canWrite();
if (canRead && canWrite && !isFloppy && isDrive && (type.toLowerCase().contains("removable") || type.toLowerCase().contains("rimovibile")))
{
//log.info("Detected PEN Drive: " + drive + " - "+ displayName);
driveLetter = drive;
break;
}
}
/*if (driveLetter.equals(""))
{
System.out.println("Not found!");
}
else
{
System.out.println(driveLetter);
}
*/
//System.out.println(driveLetter);
return driveLetter;
}
}
现在的问题是当我运行 external.java (main) 时没有错误。但是,输出仅显示检测到的驱动器是 F:\ 但它没有运行指定的程序 external.exe 并且还提到该程序已终止。有人可以帮我指出我出错的地方以及正确的代码应该是什么样的吗?我是 Java 新手。
我从http://www.snip2code.com/Snippet/506/Detect-USB-removable-drive-in-Java获得了 DetectDrive 代码,我相信它现在正在维护中。
是否可以更改 new FileWriter(" F:\external.bat ") 来检测 USB 驱动器目录?例如,让程序检测 USB 驱动器并自动放入正确的目录,而不是我们手动输入 F:\。我还没有答案。请帮忙!