request.getInputStream()1回しか読み込めないソリューション

  ，        ，          json  ，                 ，    request.getInputStream()，    controller ，       ，         request.getInputStream()       。                 。             ，      。       ，

1：  RequestHelper        ，      ，     Map,                     。

public class RequestHelper{

    /**
     * @param request
     * @return
     */
    private static Logger logger = LoggerFactory.getLogger(RequestHelper.class);
    public static Map 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) {
            logger.warn("getBodyString    ！");
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return JSON.parseObject(sb.toString(),Map.class);

    }
}

2：  inputStream       ，             ，      ，    HttpServletRequestWrapper 。
 

public class EbHttpServletWrapper extends HttpServletRequestWrapper {

    private Logger logger = LoggerFactory.getLogger(EbHttpServletWrapper.class);
    private String encoding = "UTF-8";
    private byte[] requestBodyIniBytes;

    public EbHttpServletWrapper(HttpServletRequest request) throws IOException {
        super(request);
        ServletInputStream stream = request.getInputStream();
        String requestBody = StreamUtils.copyToString(stream, Charset.forName(encoding));
        requestBodyIniBytes = requestBody.getBytes(encoding);

    }



    public ServletInputStream getInputStream() {
        final ByteArrayInputStream in;
        in = new ByteArrayInputStream(requestBodyIniBytes);

        return new ServletInputStream() {
            @Override
            public int read() throws IOException {

                return in.read();
            }
        };
    }
}

3:フィルタに次のコードを追加します(ファイルタイプの場合、問題が発生する可能性があります.削除し、ブロックしません).

public class RequestFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest request1 = (HttpServletRequest) request;
        if(Objects.isNull(request1.getHeader("Content-Type")) || request1.getHeader("Content-Type").contains("multipart/form-data;")){
            chain.doFilter(request,response);
        }else {
            chain.doFilter(new EbHttpServletWrapper(request1), response);
        }
    }

    @Override
    public void destroy() {

    }
}

転送されたデータがjson形式で行われていない場合は、このような操作をする必要はなく、request.getParameter(「key」)を直接使用すればよい.