Files.createParentDirs(file);
  }

  public void testCreateParentDirs_noParentsNeeded() throws IOException {
    File file = file(getTempDir(), "nonexistent.file");
    assertTrue(file.getParentFile().exists());
    Files.createParentDirs(file);
  }

  public void testCreateParentDirs_oneParentNeeded() throws IOException {
    File file = file(getTempDir(), "parent", "nonexistent.file");
    File parent = file.getParentFile();

    protected ChannelUtil() {
    }

    /**
     * Returns a {@link ByteBuffer} that maps the file channel to memory.
     *
     * @param channel
     *            The file channel. Must not be {@literal null}.
     * @param mode
     *            The mode. Must not be {@literal null}.
     * @return A {@link ByteBuffer} that maps the file channel to memory.
     */

## 定义 `File` 参数 { #define-file-parameters }

像为 `Body` 或 `Form` 一样创建文件参数：

{* ../../docs_src/request_files/tutorial001_an_py310.py hl[9] *}

/// info | 信息

`File` 是直接继承自 `Form` 的类。

但要注意，从 `fastapi` 导入的 `Query`、`Path`、`File` 等项，实际上是返回特定类的函数。

///

/// tip | 提示

声明文件体必须使用 `File`，否则，这些参数会被当作查询参数或请求体（JSON）参数。

///

文件将作为「表单数据」上传。

如果把*路径操作函数*参数的类型声明为 `bytes`，**FastAPI** 会为你读取文件，并以 `bytes` 的形式接收其内容。

      } finally {
        if (memory == null) {
          memory = new MemoryOutput();
        } else {
          memory.reset();
        }
        out = memory;
        if (file != null) {
          File deleteMe = file;
          file = null;
          if (!deleteMe.delete()) {
            throw new IOException("Could not delete: " + deleteMe);
          }
        }
      }
    }

            }

            // The temporary file is named destination + ".tmp" and is done this way to ensure
            // that the temporary file is in the same file system as the destination because the
            // File.renameTo operation doesn't really work across file systems.

from fastapi import FastAPI, File, UploadFile
from fastapi.responses import HTMLResponse

app = FastAPI()


@app.post("/files/")
async def create_files(
    files: list[bytes] = File(description="Multiple files as bytes"),
):
    return {"file_sizes": [len(file) for file in files]}


@app.post("/uploadfiles/")
async def create_upload_files(
    files: list[UploadFile] = File(description="Multiple files as UploadFile"),
):

///

## Importar `File` { #import-file }

Importa `File` y `UploadFile` desde `fastapi`:

{* ../../docs_src/request_files/tutorial001_an_py310.py hl[3] *}

## Definir Parámetros `File` { #define-file-parameters }

Crea parámetros de archivo de la misma manera que lo harías para `Body` o `Form`:

{* ../../docs_src/request_files/tutorial001_an_py310.py hl[9] *}

/// info | Información

        }

        /**
         * Writes [Properties] to a file, but without including the timestamp comment.
         *
         * See [PropertiesUtils.store].
         */
        fun store(properties: Properties, file: File, comment: String? = null) {
            PropertiesUtils.store(properties, file, comment, Charsets.ISO_8859_1, "\n")
        }

        private

  }

  private static File fullpath(String path) {
    return new File(new File(path).toURI());
  }

  private static URL makeJarUrlWithName(String name) throws IOException {
    /*
     * TODO: cpovirk - Use java.nio.file.Files.createTempDirectory instead of
     * c.g.c.io.Files.createTempDir?
     */
    File fullPath = new File(Files.createTempDir(), name);
    File jarFile = pickAnyJarFile();

	}
	_, err = r.Open("test.txt")
	if err != nil {
		t.Errorf("Error reading file: %v", err)
	}
	if len(r.File) != 1 {
		t.Fatalf("No entries in the file list")
	}
	if r.File[0].Name != "../test.txt" {
		t.Errorf("Unexpected entry name: %s", r.File[0].Name)
	}
	if _, err := r.File[0].Open(); err != nil {
		t.Errorf("Error opening file: %v", err)
	}
}

func TestOpenReaderInsecurePath(t *testing.T) {