如何在 REST Spring 中返回应用程序/八位字节流？

Question

从RestController 中的InputStream 返回application/octet-stream 的最佳方式是什么？ 我是否必须以“标准”Java 方式将其写入HttpResponse，或者 Spring 是否为此提供了某种机制？

Answer 1

你可以将你的输入流写入spring fileInputStream

请参考这个例子：

    File file = new File("File path");
    httpServletResponse.setHeader("Expires", "0");
    httpServletResponse.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0");
    httpServletResponse.setHeader("Pragma", "public");
    httpServletResponse.setHeader("Content-Type", "get content type from file");
    httpServletResponse.setHeader("Content-Length", String.valueOf(file.length()));
    try {
        FileInputStream fileInputStream = new FileInputStream(file);
        FileCopyUtils.copy(fileInputStream, httpServletResponse.getOutputStream());
        fileInputStream.close();
    } catch (Exception e) {
        e.printStackTrace();
    }