Question

我想创建一个临时目录，之后我应该在其中创建一个文件

我在尝试在临时文件中创建新文件时收到访问被拒绝的消息所以这是代码：

public File createFile(InputStream inputStream,File tmpDir )
{ File file = null;
      try {
            file=new  File(tmpDir.getAbsolutePath());
            // write the inputStream to a FileOutputStream
            OutputStream out = new FileOutputStream(file);

            int read = 0;
            byte[] bytes = new byte[1024];

            while ((read = inputStream.read(bytes)) != -1) {
                out.write(bytes, 0, read);
            }

            inputStream.close();
            out.flush();
            out.close();

            System.out.println("New file created!");
            } catch (IOException e) {
            System.out.println(e.getMessage());
            } 
      return file;}

/**
 * Create a new temporary directory. Use something like
 * {@link #recursiveDelete(File)} to clean this directory up since it isn't
 * deleted automatically
 * @return  the new directory
 * @throws IOException if there is an error creating the temporary directory
 */
public static File createTempDir() throws IOException
{
    final File sysTempDir = new File(System.getProperty("java.io.tmpdir"));
    File newTempDir;
    final int maxAttempts = 9;
    int attemptCount = 0;
    do
    {
        attemptCount++;
        if(attemptCount > maxAttempts)
        {
            throw new IOException(
                    "The highly improbable has occurred! Failed to " +
                    "create a unique temporary directory after " +
                    maxAttempts + " attempts.");
        }
        String dirName = UUID.randomUUID().toString();
        newTempDir = new File(sysTempDir, dirName);
    } while(newTempDir.exists());

    if(newTempDir.mkdirs())
    {
        return newTempDir;
    }
    else
    {
        throw new IOException(
                "Failed to create temp dir named " +
                newTempDir.getAbsolutePath());
    }
}

我得到了这个：

C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\e18a5cdb-a975-46e7-874c-4ea21e2fb383 (Access denied)

 e18a5cdb-a975-46e7-874c-4ea21e2fb383

Answer 1

您应该在目录中打开一个文件。您正在尝试写入操作系统不允许的目录本身。相反，您应该写入文件。例如，这会使程序在tmpDir：

中创建MyFile.txt

file=new  File(tmpDir, "MyFile.txt");

顺便问一下，你为什么不使用File.createTempFile？

新的临时目录访问被拒绝

1 个答案: