java以流的方式读取参数

@RequestMapping(value = "/portal/redirect",method = {RequestMethod.POST, RequestMethod.GET}, produces = {"text/html;charset=UTF-8"})
	public ModelAndView test(HttpServletRequest request){
		ModelAndView mav = new ModelAndView();
		
    	InputStream inputStream;
        String   json="";
        String res ="";
        //获得响应流，获得输入对象 
    	try{
             inputStream = request.getInputStream();
	        //建立接收流缓冲，准备处理
	        StringBuffer requestBuffer = new StringBuffer();
	        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "utf-8"));
	        //读入流，并转换成字符串
	        String readLine;
	        while ((readLine = reader.readLine()) != null) {
	            requestBuffer.append(readLine).append("\n");
	        }
	        reader.close();
	        json = requestBuffer.toString();
	        //logger.error("RequestInfo:" + xmlInfo);
	    	} catch(Exception e){
	    		//logger.error("接收同步消息失败"+e);
	    	}
    	LOGGER.debug("request json:" + json);
		
		mav.setViewName("redirect:../../pic/index.html");
		return mav;
	}