Question

我正在尝试打印驱动器号及其系统类型。在这个程序中，它将硬盘驱动器打印为逻辑驱动器，将CD驱动器打印为CD驱动器，将存储卡打印为可移动驱动器。当我插入外置硬盘和pendrive（sandisk cruzer blade 16 GB）时，它同时显示为逻辑驱动器。我想检测并打印外部硬盘和pendrive作为可移动设备＆＃39;因为它们是便携式的。请帮我怎么做。这是代码。

import javax.swing.filechooser.FileSystemView;
import java.io.File;
public static void main(String x[])
{
    File paths[];
    paths = File.listRoots();
    for(File path: pahts)
    {
            System.out.println("Drive Name: "+path);
            System.out.println("Description: "+fsv.getSystemTypeDescription(path));


    }



}

Answer 1

您可以使用特定于操作系统的命令并通过java Runtime执行它。例如，在Windows中，您可以使用命令wmic来获取所有驱动器详细信息，例如设备名称，标题，文件系统，类型等。例如，wmic logicaldisk get deviceid driveType将列出所有可用的驱动器号及其类型。逻辑磁盘有7种驱动器类型

0 = Unknown
1 = No Root Directory
2 = Removable Disk
3 = Local Disk
4 = Network Drive
5 = Compact Disc
6 = RAM Disk

正如您所见，类型2是您正在寻找的类型。除了逻辑磁盘之外，还可以使用wmic来检索系统的所有方面，如cpu，bios等。可以找到wmic中所有命令的列表here。

同样地，您在linux中有udevadm命令来获取设备详细信息，并在Mac中获取system_profiler。因此，如果您希望以独立于工厂形式的方式访问详细信息，则可以根据当前操作系统更改命令。使用System.getProperty("os.name")来确定当前的操作系统。

Windows OS的示例程序

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class DriveDetails {

    public static void main(String[] args) {
        String command = "wmic logicaldisk where drivetype=$$ get deviceid";
        for (DriveType driveType : DriveType.values()) {
            String query = command.replace("$$", String.valueOf(driveType.getType()));
            System.out.println(driveType.getDescription());
            System.out.println(executeCommand(query).trim());
        }
    }

    private static String executeCommand(String command) {
        StringBuffer output = new StringBuffer();
        Process p = null;
        BufferedReader reader = null;
        try {
            p = Runtime.getRuntime().exec(command);
            reader = new BufferedReader(new InputStreamReader(
                    p.getInputStream()));
            String line = "";
            boolean flag = true;
            while ((line = reader.readLine()) != null) {
                if(flag) {
                    flag = false;
                    continue; // Skipping header
                }
                output.append(line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (p != null)
                p.destroy();
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return output.toString();
    }

    enum DriveType {
        UNKNOWN(0, "Unknown"),
        NO_ROOT_DIRECTORY(1, "No Root Directory"),
        REMOVABLE_DISK(2, "Removable Disk"),
        LOCAL_DISK(3, "Local Disk"),
        NETWORK_DRIVE(4, "Network Drive"),
        COMPACT_DISC(5, "Compact Disc"),
        RAM_DISK(6, "RAM Disk");

        private DriveType(int type, String description) {
            this.type = type;
            this.description = description;
        }

        private int type;
        private String description;

        public int getType() {
            return type;
        }

        public void setType(int type) {
            this.type = type;
        }

        public String getDescription() {
            return description;
        }

        public void setDescription(String description) {
            this.description = description;
        }
    }
}

检测外部硬盘和sandisk cruzer刀片16 GB作为可移动的java

1 个答案: