Java 读写json格式的文件方法详解

sp;  request.setCharacterEncoding("UTF-8");   response.setContentType("text/json;charset=utf-8");   log.info("reach ChangeElectSet");   String json = (String) request.getParameter("json").trim();   log.info("Change ElectSet");   log.info(json);   ElectSet sets = new ElectSet();   JSONObject jsonObject = JSONObject.fromObject(json);   sets = (ElectSet) JSONObject.toBean(jsonObject, ElectSet.class);   if(sets.getIsReadDB()=="false"){    sets.setIsReadDB("否");   }   else{    sets.setIsReadDB("是");   }   String changes="{"xuenian":"";//因为json的属性要用引号，所以要用"转义一下   changes =sets.getXuenian() "","xueqi":"" sets.getXueqi() "","startTime":"" sets.getStartTime() "","endTime":"" sets.getEndTime() "","menshu":"" sets.getMenshu() "","isReadDB":"" sets.getIsReadDB() ""}";   System.out.println(changes);   String absPath = request.getRealPath("");   String filePath = absPath "publicsetselectSets.json";