使用 Java 的映射网络驱动器未连接

Question

我正在尝试通过 Java 使用命令 'net use' 映射网络驱动器。

我尝试了几种我在网上看到的方法，但 none 似乎在我们的 UAT PC 上有效，但在我的 PC 上始终有效。

UAT PC - WindowsServer 2008 R2 Standard Service Pack 1。我的电脑 - Windows 7 Pro Service Pack 1

发生的情况是该方法创建了一个新驱动器，但驱动器图标有一个 X 标记，表示出现问题，当我单击它时，它显示： "Location is unavailable" [留言标题] 无法访问 L: 。登录失败：未知用户名或密码不正确。

以下是我迄今为止尝试过但产生相同结果的代码。

public void connectToRemoteServer()
{
  try
  {
    String USER_NAME = "domain\username";
    String PASSWORD = "password";
    /** ATTEMPT 1 - Call command from JAVA using string - OK in LOCAL, FAILED in UAT */
    // String commandInside = "net use " + REMOTE_FILE_SERVER_DRIVE + ": \\ipaddress\folder /user:" + USER_NAME + " " + PASSWORD;
    // Process p = Runtime.getRuntime().exec(commandInside);
    // Log.info("Executing command [" + commandInside + "]");
    // p.waitFor();

    /** ATTEMPT 2 - Call command from JAVA using an array of string - OK in LOCAL, FAILED in UAT */
    // String[] commandInside =  {"c:\windows\system32\net.exe", "use", REMOTE_FILE_SERVER_DRIVE + ":", "\\ipaddress\folder", "/user:" + USER_NAME, PASSWORD };
    // Process p = Runtime.getRuntime().exec(commandInside);
    // Log.info("Executing command [" + commandInside + "]");
    // p.waitFor();

    /** ATTEMPT 3 - Call command from JAVA using a process builder  - OK in LOCAL, FAILED in UAT */
    // String[] commandInside =  { "cmd.exe", "/C", "net", "use", REMOTE_FILE_SERVER_DRIVE + ":", "\\ipaddress\folder", "/user:" + USER_NAME, PASSWORD };
    // Log.info("Constructed command [" + Arrays.toString(commandInside) + "]");
    // ProcessBuilder pb = new ProcessBuilder(commandInside);
    // Log.info("Starting command");
    // Process process = pb.start();
    // Log.info("Waiting for command to complete");
    // process.waitFor();

    /** ATTEMPT 4 - Write the command in a cmd/bat file then execute that cmd/bat file from JAVA using an array of string  - OK in LOCAL, FAILED in UAT*/
    File batchFile = new File(ROOT_PATH + "MapRemoteServer.cmd");

    String commandInside = "net use " + REMOTE_FILE_SERVER_DRIVE + ": \\ipaddress\folder/user:" + USER_NAME + " " + PASSWORD;
    batchFile.createNewFile();
    FileWriter fw = new FileWriter(batchFile);
    fw.write(commandInside + "\r\n\r\nexit");
    fw.close();

    Thread.sleep(500);  // just to ensure that the file is properly closed before running it
    String[] command = { "cmd.exe", "/c", "Start", ROOT_PATH + "MapRemoteServer.cmd" };

    Process process = Runtime.getRuntime().exec(command);
    process.waitFor();


    int exitStatus = process.exitValue();
    Log.info("Exit status: [" + exitStatus + "]");

    if (exitStatus != 0 && exitStatus != 2)
    {
      BufferedReader stdError = new BufferedReader(new  InputStreamReader(process.getErrorStream()));
      String messageLine = null;
      Log.info("Error/Warning encountered during execution of net use!");
      while ((messageLine = stdError.readLine()) != null) {
        if (messageLine.length() > 0) 
        {
          Log.info(messageLine);
        }
      }
    }
    else if (exitStatus == 2)
    {
      Log.info("Connection already established!");
    }
    else
    {
      Log.info("Connection successful!");
    }
  }
  catch (Exception e)
  {
    e.printStackTrace();
  }
}

如果我运行命令行中的实际命令（来自尝试 1）或我自己执行批处理文件（来自尝试 4），它会起作用。只有当它被我的 Java 代码执行时它才不会。

除了网络使用之外，还有其他方法可以通过 Java 映射 windows 中的驱动器吗？是否有某种可以在 Windows PC 中完成的设置可能会阻止程序映射？

Answer 1

发布答案以供将来参考。当我执行没有字母的 net use 命令时，它起作用了。它不会创建驱动器号，但如果我键入完整路径 (ipaddress\folder)，我就可以访问它。我使用的命令字符串是

net use " + "\\ipaddress\folder /user:" + USER_NAME + " " + PASSWORD

...成功了！顺便说一句，我的ID有完整的访问权限。

您只需检查该文件夹是否存在 if (!myDirectory.exists()) 即可知道您是否已连接。

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