Java读取json文件并进行处理

public class testTicketOID {
    public static void main(String[] args) throws IOException {


        String jsonStr = "";
        try {
            File file = new File("/Users/jinyan/IdeaProjects/88bugs_service/src/main/java/testPXQ/SessionVO.json");
            FileReader fileReader = new FileReader(file);
            Reader reader = new InputStreamReader(new FileInputStream(file), "Utf-8");
            int ch = 0;
            StringBuffer sb = new StringBuffer();
            while ((ch = reader.read()) != -1) {
                sb.append((char) ch);
            }
            fileReader.close();
            reader.close();
            jsonStr = sb.toString();


            String SessionVOs = jsonStr;

            JSONArray dataListArray = new JSONArray(SessionVOs);

            String SessionOID="";
            String price="";
            String seatPlanOID="";
            String ticketOID="";


            for (int i = 0; i < dataListArray.length(); i++) {
                JSONObject aaa = new JSONObject(dataListArray.get(i).toString());
                String showStatus = aaa.get("available").toString();
                if (showStatus.equals("true")) {
                    JSONArray seatplans = new JSONArray(aaa.get("seatplans").toString());
                    for(int j=0;j<seatplans.length();j++){
                        JSONObject seatplan = new JSONObject(seatplans.get(j).toString());
                        String seatPlanAvaliable = seatplan.get("available").toString();
                        if(seatPlanAvaliable.equals("true")){
                             SessionOID = seatplan.get("showSessionOID").toString();
                            JSONArray tickets = new JSONArray(seatplan.get("tickets").toString());
                            JSONObject ticketList = new JSONObject(tickets.get(0).toString());
                             price=ticketList.get("price").toString();
                             seatPlanOID=ticketList.get("seatPlanOID").toString();
                             ticketOID=ticketList.get("ticketOID").toString();
                            System.out.println(price);
                            System.out.println(ticketOID);
                            System.out.println(j);
                            System.out.println(tickets);
                            break;
                        }
                    }
                    break;
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
}