SpringBoot实现任意位置获取HttpServletRequest对象

//获取RequestAttributes
 RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
 //从获取RequestAttributes中获取HttpServletRequest的信息
 HttpServletRequest request = (HttpServletRequest)requestAttributes.resolveReference(RequestAttributes.REFERENCE_REQUEST);

ServletRequestAttributes attributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();

public class BodyReaderHttpServletRequestWrapper extends HttpServletRequestWrapper {
    private final byte[] body;
    public BodyReaderHttpServletRequestWrapper(HttpServletRequest request) throws ioException {
        super(request);
        body = HttpHelper.getBodyString(request).getBytes(Charset.forName("UTF-8"));
    }
    @Override
    public BufferedReader getReader() throws IOException {
        return new BufferedReader(new InputStreamReader(getInputStream()));
    }
    @Override
    public ServletInputStream getInputStream() throws IOException {
        final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(body);
        return new ServletInputStream() {
            @Override
            public int read() throws IOException {
                return byteArrayInputStream.read();
            }
            @Override
            public boolean isFinished() {
                return false;
            }
            @Override
            public boolean isReady() {
                return false;
            }
            @Override
            public void setReadListener(ReadListener readListener) {
            }
        };
    }
}

public class RepeatReadFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
        // 防止流读取一次后就没有了, 所以需要将流继续写出去
        ServletRequest requestWrapper = new BodyReaderHttpServletRequestWrapper(httpServletRequest);
        //获取用户凭证
        String token = httpServletRequest.getHeader(Constants.USER_TOKEN);
        if(StringUtils.isBlank(token)){
            token = httpServletRequest.getParameter(Constants.USER_TOKEN);
        }
        //=================获取JSON格式的token字段=========================
        String body = HttpHelper.getBodyString(requestWrapper);
        if (StringUtils.isNotBlank(body)) {
            jsONObject jsonObject = JSONObject.parseObject(body);
            Object obj = jsonObject.get("token");
            if (null != obj) {
                token = obj.toString();
            }
        }
        requestWrapper.setAttribute(Constants.USER_TOKEN,token);
        chain.doFilter(requestWrapper, response);
    }
    @Override
    public void destroy() {
    }
}

@Configuration
public class FilterConfig {
    @Bean
    public FilterReGIStrationBean registFilter() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new RepeatReadFilter());
        registration.addUrlPatterns("/app
    public static String getBodyString(ServletRequest request) {
        StringBuilder sb = new StringBuilder();
        InputStream inputStream = null;
        BufferedReader reader = null;
        try {
            inputStream = request.getInputStream();
            reader = new BufferedReader(new InputStreamReader(inputStream, Charset.forName("UTF-8")));
            String line = "";
            while ((line = reader.readLine()) != null) {
                sb.append(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return sb.toString();
    }
}