从request对象中获取请求json格式的参数

BufferedReader streamReader = new BufferedReader( new InputStreamReader(request.getInputStream(), "UTF-8"));
StringBuilder responseStrBuilder = new StringBuilder();
String inputStr;
while ((inputStr = streamReader.readLine()) != null){
    responseStrBuilder.append(inputStr);
}
JSONObject jsonObject = JSONObject.parseObject(responseStrBuilder.toString());