java - 从 HttpServletRequest 解析二进制数据

Question

检索发布到 Java Servlet 的二进制数据的一般方法是什么？一个 byte[] 被发布到这个 servlet，我想我必须以某种方式解析 HttpServletRequest.getInputStream() 并提取 byte[] 内容。关于如何更改以下代码来实现此目的有什么想法吗？

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        StringBuilder stringBuilder = new StringBuilder();
        BufferedReader bufferedReader = null;
        try {
          InputStream inputStream = request.getInputStream();
          if (inputStream != null) {
           bufferedReader = new BufferedReader(new InputStreamReader(
        inputStream));
           char[] charBuffer = new char[128];
           int bytesRead = -1;
           while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {
            stringBuilder.append(charBuffer, 0, bytesRead);
           }
          } else {
           stringBuilder.append("");
          }
        } catch (IOException ex) {
          throw ex;
        } finally {
          if (bufferedReader != null) {
           try {
            bufferedReader.close();
           } catch (IOException ex) {
            throw ex;
           }
          }
        }
        String body = stringBuilder.toString();
        System.out.println(body);
}

Answer 1

不要将输入流包装在任何“Reader”中，因为它们从字节转换为字符，而您需要字节。