#vulnerable code 
                                private ResponseEntity<String> savedParkingSpaceInfo(IPageData pd, List<ImportParkingSpace> parkingSpaces, ComponentValidateResult result) {
        String apiUrl = "";
        JSONObject paramIn = null;
        ResponseEntity<String> responseEntity = new ResponseEntity<String>("成功",HttpStatus.OK);
        ImportOwner owner = null;
        for (ImportParkingSpace parkingSpace : parkingSpaces) {
            JSONObject savedParkingSpaceInfo = getExistsParkSpace(pd, result, parkingSpace);
            if (savedParkingSpaceInfo != null) {
                continue;
            }

            paramIn = new JSONObject();

            apiUrl = ServiceConstant.SERVICE_API_URL + "/api/parkingSpace.saveParkingSpace";

            paramIn.put("communityId", result.getCommunityId());
            paramIn.put("userId", result.getUserId());
            paramIn.put("num", parkingSpace.getPsNum());
            paramIn.put("area", parkingSpace.getArea());
            paramIn.put("typeCd", parkingSpace.getTypeCd());

            responseEntity = this.callCenterService(restTemplate, pd, paramIn.toJSONString(), apiUrl, HttpMethod.POST);
            if (responseEntity.getStatusCode() != HttpStatus.OK) {
                continue;
            }

            savedParkingSpaceInfo = getExistsParkSpace(pd, result, parkingSpace);
            if (savedParkingSpaceInfo != null) {
                continue;
            }

            //是否有业主信息
            if (parkingSpace.getImportOwner() == null) {
                continue;
            }

            paramIn.clear();

            paramIn.put("communityId", result.getCommunityId());
            paramIn.put("ownerId", parkingSpace.getImportOwner().getOwnerId());
            paramIn.put("carNum", parkingSpace.getCarNum());
            paramIn.put("carBrand", parkingSpace.getCarBrand());
            paramIn.put("carType", parkingSpace.getCarType());
            paramIn.put("carColor", parkingSpace.getCarColor());
            paramIn.put("psId", savedParkingSpaceInfo.getString("psId"));
            paramIn.put("storeId", result.getStoreId());
            paramIn.put("sellOrHire", parkingSpace.getSellOrHire());

            String feeTypeCd = "1001".equals(parkingSpace.getTypeCd())
                    ? FeeTypeConstant.FEE_TYPE_SELL_UP_PARKING_SPACE : FeeTypeConstant.FEE_TYPE_SELL_DOWN_PARKING_SPACE;
            apiUrl = ServiceConstant.SERVICE_API_URL + "/api/fee.queryFeeConfig?communityId=" + result.getCommunityId() + "&feeTypeCd=" + feeTypeCd;
            responseEntity = this.callCenterService(restTemplate, pd, "", apiUrl, HttpMethod.GET);

            if (responseEntity.getStatusCode() != HttpStatus.OK) {
                continue;
            }

            JSONObject configInfo = JSONObject.parseObject(responseEntity.getBody());
            if(!configInfo.containsKey("additionalAmount")){
                continue;
            }

            paramIn.put("receivedAmount", configInfo.getString("additionalAmount"));

            apiUrl = ServiceConstant.SERVICE_API_URL + "/api/parkingSpace.sellParkingSpace";
            responseEntity = this.callCenterService(restTemplate, pd, paramIn.toJSONString(), apiUrl, HttpMethod.POST);
        }

        return responseEntity;
    } 
                            #location 45 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                private ResponseEntity<String> savedParkingSpaceInfo(IPageData pd, List<ImportParkingSpace> parkingSpaces, ComponentValidateResult result) {
        String apiUrl = "";
        JSONObject paramIn = null;
        ResponseEntity<String> responseEntity = new ResponseEntity<String>("成功", HttpStatus.OK);
        ImportOwner owner = null;
        for (ImportParkingSpace parkingSpace : parkingSpaces) {
            JSONObject savedParkingSpaceInfo = getExistsParkSpace(pd, result, parkingSpace);
            if (savedParkingSpaceInfo != null) {
                continue;
            }

            paramIn = new JSONObject();

            apiUrl = ServiceConstant.SERVICE_API_URL + "/api/parkingSpace.saveParkingSpace";

            paramIn.put("communityId", result.getCommunityId());
            paramIn.put("userId", result.getUserId());
            paramIn.put("num", parkingSpace.getPsNum());
            paramIn.put("area", parkingSpace.getArea());
            paramIn.put("typeCd", parkingSpace.getTypeCd());

            responseEntity = this.callCenterService(restTemplate, pd, paramIn.toJSONString(), apiUrl, HttpMethod.POST);
            if (responseEntity.getStatusCode() != HttpStatus.OK) {
                continue;
            }

            savedParkingSpaceInfo = getExistsParkSpace(pd, result, parkingSpace);
            if (savedParkingSpaceInfo == null) {
                continue;
            }

            //是否有业主信息
            if (parkingSpace.getImportOwner() == null) {
                continue;
            }

            paramIn.clear();

            paramIn.put("communityId", result.getCommunityId());
            paramIn.put("ownerId", parkingSpace.getImportOwner().getOwnerId());
            paramIn.put("carNum", parkingSpace.getCarNum());
            paramIn.put("carBrand", parkingSpace.getCarBrand());
            paramIn.put("carType", parkingSpace.getCarType());
            paramIn.put("carColor", parkingSpace.getCarColor());
            paramIn.put("psId", savedParkingSpaceInfo.getString("psId"));
            paramIn.put("storeId", result.getStoreId());
            paramIn.put("sellOrHire", parkingSpace.getSellOrHire());

            String feeTypeCd = "1001".equals(parkingSpace.getTypeCd())
                    ? FeeTypeConstant.FEE_TYPE_SELL_UP_PARKING_SPACE : FeeTypeConstant.FEE_TYPE_SELL_DOWN_PARKING_SPACE;
            apiUrl = ServiceConstant.SERVICE_API_URL + "/api/fee.queryFeeConfig?communityId=" + result.getCommunityId() + "&feeTypeCd=" + feeTypeCd;
            responseEntity = this.callCenterService(restTemplate, pd, "", apiUrl, HttpMethod.GET);

            if (responseEntity.getStatusCode() != HttpStatus.OK) {
                continue;
            }

            JSONObject configInfo = JSONArray.parseArray(responseEntity.getBody()).getJSONObject(0);
            if (!configInfo.containsKey("additionalAmount")) {
                continue;
            }

            paramIn.put("receivedAmount", configInfo.getString("additionalAmount"));

            apiUrl = ServiceConstant.SERVICE_API_URL + "/api/parkingSpace.sellParkingSpace";
            responseEntity = this.callCenterService(restTemplate, pd, paramIn.toJSONString(), apiUrl, HttpMethod.POST);
        }

        return responseEntity;
    }