HttpServletRequestWrapper处理request数据流多次读取问题

问题: 要实现一个spring拦截器需要读取request数据流，但是request数据流只能读取一次，需要自己实现HttpServletRequestWrapper对数据流包装，实现如下:

public class ReadHttpServletRequestWrapper extends HttpServletRequestWrapper {

    private final byte[] cachedBytes;

    public ReadHttpServletRequestWrapper(HttpServletRequest request) throws IOException {
        super(request);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        IOUtils.copy(request.getInputStream(), baos);
        this.cachedBytes = baos.toByteArray();
    }

    @Override
    public ServletInputStream getInputStream() throws IOException {
        final ByteArrayInputStream bais = new ByteArrayInputStream(cachedBytes);
        return new ServletInputStream() {
            @Override
            public int read() throws IOException {
                return bais.read();
            }
        };
    }

    @Override
    public BufferedReader getReader() throws IOException{
        return new BufferedReader(new InputStreamReader(getInputStream()));
    }


}

拦截器的实现:(这里不贴代码了，mock下)

public class WrapperHandlerInterceptor implements HandlerInterceptor {
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {