如何通过ServletInputStream读取http请求传入的数据

/**

  * 增加数据

  * @param module

  * @param function

  * @param system

  * @param platform

  * @param time

  * @param status

  * @return ModelAndView

  * @throws IOException

  */

@RequestMapping ( "/insertOne" )

public ModelAndView insertOne(HttpServletRequest req) throws IOException {

     ServletInputStream ris = req.getInputStream();

     StringBuilder content = new StringBuilder();

     byte [] b = new byte [ 1024 ];

     int lens = - 1 ;

     while ((lens = ris.read(b)) > 0 ) {

         content.append( new String(b, 0 , lens));

     }

     String strcont = content.toString(); // 内容  

     JSONObject jsonObj = JSONObject.fromObject(strcont);

     DBObject obj = new BasicDBObject();

     obj.put( "module" , jsonObj.getString( "module" ));

     obj.put( "function" , jsonObj.getString( "function" ));

     obj.put( "system" , jsonObj.getString( "system" ));

     obj.put( "platform" , jsonObj.getString( "platform" ));

     obj.put( "time" , jsonObj.getString( "time" ));

     obj.put( "status" , jsonObj.getString( "status" ));

     Map<String, Object> map = new HashMap<String, Object>();   

     int len = ((DBManager) conn).insertOne(obj);       

     map.put( "status" , (len == 0 )?( "SUCCESS" ):( "ERROR" ));

     return MVC.toString(map);

}

JSONObject jsonObj = JSONObject.fromObject(strcont);

System.out.println(jsonObj.getString( "module" ));

ServletInputStream sin=request.getInputStream();