Java获取所有形式的请求参数

public static HashMap<String, Object> getAllParam() throws IOException {
        HashMap<String, Object> map = new HashMap<>(2);
        RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
        ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) attributes;
        HttpServletRequest request = servletRequestAttributes.getRequest();
        /**
         * 1.从表单上获取参数
         * 2.从URL上获取参数:
         */
        Map<String, String[]> parameterMap = request.getParameterMap();
        parameterMap.forEach((k, v) -> {
            if (v.length == 1) {
                map.put(k, v[0]);
            } else if (v.length > 1) {
                map.put(k, Arrays.asList(v));
            } else {
                map.put(k, v);
            }
        });
        /**
         * 3.从body上获取参数
         */
        BufferedReader reader = new BufferedReader(new InputStreamReader(request.getInputStream()));
        //读取输入流的内容转换为String类型IOUtils必须引入org.apache.dubbo.common.utils.IOUtils;包
        String body = RequestBodyUtils.read(reader);
        if (!"".equals(body.replaceAll(" ", ""))) {

            if (body.startsWith("{") && body.endsWith("}")) {
                //JSON形式
                JSONObject jsonObject = JSON.parseObject(body);
                map.putAll(jsonObject);
            } else if (body.startsWith("[") && body.endsWith("]")) {
                //JSON数组的形式
                JSONArray objects = JSON.parseArray(body);
                map.put("body",objects);
            } else {
                //键值对形式
                String[] vks = body.split("&");
                for (String vk : vks) {
                    String[] split = vk.split("=");
                    if (split.length == 2) {
                        map.put(split[0], split[1]);
                    }
                }
            }
        }
        //从请求头上:获取参数
        Enumeration<String> headerNames = request.getHeaderNames();
        while (headerNames.hasMoreElements()) {
            String k = headerNames.nextElement();
            String v = request.getHeader(k);
            map.put(k, v);
        }

        return map;
    }


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