spring boot 中實現兼容不一樣的請求類型的方法。

　　好比一個接口，既想實現請求參數是application/json,又想實現form提交，改怎麼作呢？用postman去測試，發現不可能作到一箭雙鵰。

　　我有一個方法，就是不用requestbody，也能夠實現json解析，首先是新建一個包裝類，這個類能夠重複讀inputstream裏面的東西。

　　若是加了requestbody,就沒法用form提交，若是去掉requestbody 那麼就沒法獲取到json裏面的值，由於全是null.

class BodyReaderHttpServletRequestWrapper extends HttpServletRequestWrapper {

    private final byte[] body;

    public BodyReaderHttpServletRequestWrapper(HttpServletRequest request)
            throws IOException {
        super(request);
　　　　//編碼默認iso-8859-1
        body = StreamUtil.readBytes(request.getReader(), "utf-8");
    }

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

    @Override
    public ServletInputStream getInputStream() throws IOException {
        final ByteArrayInputStream bais = new ByteArrayInputStream(body);
        return new ServletInputStream() {

            @Override
            public int read() throws IOException {
                return bais.read();
            }

            @Override
            public boolean isFinished() {
                return false;
            }

            @Override
            public boolean isReady() {
                return false;
            }

            @Override
            public void setReadListener(ReadListener listener) {

            }
        };


    }

}

　　而後再從inputstream裏面拿東西就OK拉

public static JSONObject receivePost(HttpServletRequest request) throws IOException, UnsupportedEncodingException {

        // 讀取請求內容
        BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));
        String line = null;
        StringBuilder sb = new StringBuilder();
        while ((line = br.readLine()) != null) {
            sb.append(line);
        }
        //將json字符串轉換爲json對象
        JSONObject json=JSONObject.parseObject(sb.toString());
        return json;
    }

　　最後在action裏面作判斷就OK了，大功告成。

if(servletRequest.getContentType().equals("application/json"))
        {
            servletRequest= new BodyReaderHttpServletRequestWrapper( servletRequest);
            JSONObject d= receivePost(servletRequest);
        }
        else
        {
           Map<String,String[]> map= servletRequest.getParameterMap();

        }