从InputStream到servletInputStream

问题描述

我有这个InputStream:

I have this InputStream:

InputStream inputStream = new ByteArrayInputStream(myString.getBytes(StandardCharsets.UTF_8));

如何将其转换为ServletInputStream?

How can I convert this to ServletInputStream?

我尝试过:

ServletInputStream  servletInputStream = (ServletInputStream) inputStream;

但不起作用.

我的方法是这样

private static class LowerCaseRequest extends HttpServletRequestWrapper {

        public LowerCaseRequest(final HttpServletRequest request) throws IOException, ServletException {
            super(request);
        }

        @Override
        public ServletInputStream getInputStream() throws IOException {

            ServletInputStream servletInputStream;

            StringBuilder jb = new StringBuilder();
            String line;
            String toLowerCase = "";

            BufferedReader reader = new BufferedReader(new InputStreamReader(super.getInputStream()));
            while ((line = reader.readLine()) != null) {
                toLowerCase = jb.append(line).toString().toLowerCase();
            }

            InputStream inputStream = new ByteArrayInputStream(toLowerCase.getBytes(StandardCharsets.UTF_8));

            servletInputStream = (ServletInputStream) inputStream;

            return servletInputStream;

        }
 }

我正在尝试将我的所有请求都转换为小写.

I´m trying to convert all my request to lowercase.

推荐答案

尝试以下代码.

ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(myString.getBytes(StandardCharsets.UTF_8));
    ServletInputStream servletInputStream=new ServletInputStream(){
        public int read() throws IOException {
          return byteArrayInputStream.read();
        }
      }

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