比如一个接口，既想实现请求参数是application/json,又想实现form提交，改怎么做呢？用postman去测试，发现不可能做到两全其美。

　　我有一个方法，就是不用requestbody，也可以实现json解析，首先是新建一个包装类，这个类可以重复读inputstream里面的东西。

　　如果加了requestbody,就无法用form提交，如果去掉requestbody 那么就无法获取到json里面的值，因为全是null.

class BodyReaderHttpServletRequestWrapper extends HttpServletRequestWrapper {    private final byte[] body;    public BodyReaderHttpServletRequestWrapper(HttpServletRequest request)            throws IOException {        super(request); 　　　　//编码默认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) {            }        };    }}

　　然后再从inputstream里面拿东西就OK拉

public static JSONObject receivePost(HttpServletRequest request) throws IOException, UnsupportedEncodingException {        // 读取请求内容        BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));        String line = null;        StringBuilder sb = new StringBuilder();        while ((line = br.readLine()) != null) {            sb.append(line);        }        //将json字符串转换为json对象        JSONObject json=JSONObject.parseObject(sb.toString());        return json;    }

　　最后在action里面做判断就OK了，大功告成。

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