Wie bleiben POST-Body-Parameter in Java-Servlets für mehrere Lesevorgänge erhalten?

public class MultiReadHttpServletRequest extends HttpServletRequestWrapper {

    private ByteArrayOutputStream cachedBytes;

    public MultiReadHttpServletRequest(HttpServletRequest request) {
        super(request);
    }

    @Override
    public ServletInputStream getInputStream() throws IOException {
        if (cachedBytes == null) {
            cacheInputStream();
        }

        return new CachedServletInputStream(cachedBytes.toByteArray());
    }

    private void cacheInputStream() throws IOException {
        cachedBytes = new ByteArrayOutputStream();
        IOUtils.copy(super.getInputStream(), cachedBytes);
    }

    private static class CachedServletInputStream extends ServletInputStream {

        private final ByteArrayInputStream buffer;

        public CachedServletInputStream(byte[] contents) {
            this.buffer = new ByteArrayInputStream(contents);
        }

        @Override
        public int read() {
            return buffer.read();
        }

        // Implement other methods required by ServletInputStream interface, such as isFinished, isReady, setReadListener, etc.

    }
}

public class MyFilter implements Filter {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {

        // Wrap the request to enable multiple reads of the request body
        MultiReadHttpServletRequest multiReadRequest = new MultiReadHttpServletRequest((HttpServletRequest) request);

        // Read the request body for our own processing
        doMyThing(multiReadRequest.getInputStream());

        // Continue the filter chain with the wrapped request, allowing subsequent handlers to access the cached request body
        chain.doFilter(multiReadRequest, response);
    }
}