在Filter中获取请求体参数application/json格式

核心代码

  //读取请求体参数
        BufferedReader streamReader = new BufferedReader(new InputStreamReader(request.getInputStream(), "UTF-8"));
        StringBuilder sb = new StringBuilder();
        String inputStr;
        while ((inputStr = streamReader.readLine()) != null) {
            sb.append(inputStr);//sb里面就是请求体参数
        }