[JAVA] Gson으로 String to Json 객체로 변환하기

지난 공공데이터를 작업하면서 Json으로 return 받은 데이터를 객체화하기위한 구글링을 열심히 하며,

매번 같은 것을 찾는 나자신을 보며 또 적어두기로 다짐했다.

 

http://openapi.airport.kr/openapi/service/StatusOfPassengerFlights/getPassengerArrivals?serviceKey=1iqzl6hyjezWrIKfjnfLP%2Bwp2k8YV9%2BkycjKkXGSjbL5%2B7YNS0bpFnN6tlVm1%2FpTRk95Pg5h06mwqlZqJIbCBg%3D%3D&to_time=2400&from_time=0000&airport=LAX&airline=&flight_id=&lang=K 

 

위와같이 공공데이터 요청시 아래와같은 json 데이터가 return된다.

{
    "response": {
        "header": {
            "resultCode": "00",
            "resultMsg": "NORMAL SERVICE."
        },
        "body": {
            "items": {
                "item": [
                    {
                        "airline": "아시아나항공",
                        "airport": "로스앤젤레스",
                        "airportCode": "LAX",
                        "carousel": 18,
                        "cityCode": "LAX",
                        "elapsetime": 1204,
                        "estimatedDateTime": "0328",
                        "exitnumber": "D",
                        "flightId": "OZ203",
                        "gatenumber": 43,
                        "remark": "도착",
                        "scheduleDateTime": "0500",
                        "terminalId": "P01"
                    },
                    {
                        "airline": "란항공",
                        "airport": "로스앤젤레스",
                        "airportCode": "LAX",
                        "carousel": 6,
                        "cityCode": "LAX",
                        "elapsetime": 1215,
                        "estimatedDateTime": "0401",
                        "exitnumber": "B",
                        "flightId": "LA8425",
                        "gatenumber": 266,
                        "remark": "도착",
                        "scheduleDateTime": "0500",
                        "terminalId": "P03"
                    }
                ]
            }
        }
    }
}

 

 

 

GSON으로 JSON객체 변환하기

---

String str = sb.toString();
JsonParser parser = new JsonParser();
JsonElement element = parser.parse(str);
JsonObject rootob = element.getAsJsonObject().get("response").getAsJsonObject();
JsonObject body = rootob.getAsJsonObject().get("body").getAsJsonObject();
JsonObject items = body.getAsJsonObject().get("items").getAsJsonObject();

위와같은 소스로 받아온 데이터를 json객체로 파싱해준다. 

 

 

List객체로 변환할때

Gson gson = new Gson();
		JsonArray item = items.getAsJsonObject().get("item").getAsJsonArray();
		List<ReturnVo> list2 = gson.fromJson(item.toString(), new TypeToken<List<ReturnVo>>(){}.getType());

 

 

단일객체로 변환할때

Gson gson = new Gson();
ReturnVo item = gson.fromJson(items, ReturnVo.class);

 

ReturnVo

public class ReturnVo{

	private static final long serialVersionUID = -1846931839175019298L;
	
	private List<AirItem> item;
	
	public List<AirItem> getItem() {
		return item;
	}

	public void setItem(List<AirItem> item) {
		this.item = item;
	}


	public static class AirItem {
		
		/** 항공사 */
		private String airline;
		/** 편명 */
		private String flightId;
		
		/** 출발공항코드 */
		private String airportCode;
		/** 출발예정시간 */
		private String scheduleDateTime;
		/** 출발변경시간 */
		private String estimatedDateTime;
		
		/** 출발 or 도착 공항 */
		private String airport;
		
		/** 탑승구 */
		private String gatenumber;
		
		/** 체크인카운터 */
		private String chkinrange;
		
		/** 수하물수취대 */
		private String carousel;
		/** */
		private String cityCode;
		
		/** 소요시간 */
		private String elapsetime;
		
		/** 1경유지 */
		private String firstopover;
		/** 1경유지이름 */
		private String firstopovername;
		
		/** 2경유지 */
		private String secstopover;
		/** 2경유지이름 */
		private String secstopovername;
		
		/** 3경유지 */
		private String thistopover;
		/** 3경유지이름 */
		private String thistopovername;
		
		
		/** 4경유지 */
		private String foustopover;
		/** 4경유지이름 */
		private String foustopovername;
		
		/** 5경유지 */
		private String fifstopover;
		/** 5경유지이름 */
		private String fifstopovername;
		
		/** 6경유지 */
		private String sixstopover;
		/** 6경유지이름 */
		private String sixstopovername;
		
		/** 출구 */
		private String exitnumber;
		
		
		/** 현황 */
		private String remark;
		/** 터미널아이디 */
		private String terminalId;
		public String getAirline() {
			return airline;
		}
		public void setAirline(String airline) {
			this.airline = airline;
		}
		public String getAirport() {
			return airport;
		}
		public void setAirport(String airport) {
			this.airport = airport;
		}
		public String getAirportCode() {
			return airportCode;
		}
		public void setAirportCode(String airportCode) {
			this.airportCode = airportCode;
		}
		public String getCarousel() {
			return carousel;
		}
		public void setCarousel(String carousel) {
			this.carousel = carousel;
		}
		public String getCityCode() {
			return cityCode;
		}
		public void setCityCode(String cityCode) {
			this.cityCode = cityCode;
		}
		public String getElapsetime() {
			return elapsetime;
		}
		public void setElapsetime(String elapsetime) {
			this.elapsetime = elapsetime;
		}
		public String getEstimatedDateTime() {
			return estimatedDateTime;
		}
		public void setEstimatedDateTime(String estimatedDateTime) {
			this.estimatedDateTime = estimatedDateTime;
		}
		public String getExitnumber() {
			return exitnumber;
		}
		public void setExitnumber(String exitnumber) {
			this.exitnumber = exitnumber;
		}
		public String getFlightId() {
			return flightId;
		}
		public void setFlightId(String flightId) {
			this.flightId = flightId;
		}
		public String getGatenumber() {
			return gatenumber;
		}
		public void setGatenumber(String gatenumber) {
			this.gatenumber = gatenumber;
		}
		public String getRemark() {
			return remark;
		}
		public void setRemark(String remark) {
			this.remark = remark;
		}
		public String getScheduleDateTime() {
			return scheduleDateTime;
		}
		public void setScheduleDateTime(String scheduleDateTime) {
			this.scheduleDateTime = scheduleDateTime;
		}
		public String getTerminalId() {
			return terminalId;
		}
		public void setTerminalId(String terminalId) {
			this.terminalId = terminalId;
		}
		public String getChkinrange() {
			return chkinrange;
		}
		public void setChkinrange(String chkinrange) {
			this.chkinrange = chkinrange;
		}
		public String getFirstopover() {
			return firstopover;
		}
		public void setFirstopover(String firstopover) {
			this.firstopover = firstopover;
		}
		public String getFirstopovername() {
			return firstopovername;
		}
		public void setFirstopovername(String firstopovername) {
			this.firstopovername = firstopovername;
		}
		public String getSecstopover() {
			return secstopover;
		}
		public void setSecstopover(String secstopover) {
			this.secstopover = secstopover;
		}
		public String getSecstopovername() {
			return secstopovername;
		}
		public void setSecstopovername(String secstopovername) {
			this.secstopovername = secstopovername;
		}
		public String getThistopover() {
			return thistopover;
		}
		public void setThistopover(String thistopover) {
			this.thistopover = thistopover;
		}
		public String getThistopovername() {
			return thistopovername;
		}
		public void setThistopovername(String thistopovername) {
			this.thistopovername = thistopovername;
		}
		public String getFoustopover() {
			return foustopover;
		}
		public void setFoustopover(String foustopover) {
			this.foustopover = foustopover;
		}
		public String getFoustopovername() {
			return foustopovername;
		}
		public void setFoustopovername(String foustopovername) {
			this.foustopovername = foustopovername;
		}
		public String getFifstopover() {
			return fifstopover;
		}
		public void setFifstopover(String fifstopover) {
			this.fifstopover = fifstopover;
		}
		public String getFifstopovername() {
			return fifstopovername;
		}
		public void setFifstopovername(String fifstopovername) {
			this.fifstopovername = fifstopovername;
		}
		public String getSixstopover() {
			return sixstopover;
		}
		public void setSixstopover(String sixstopover) {
			this.sixstopover = sixstopover;
		}
		public String getSixstopovername() {
			return sixstopovername;
		}
		public void setSixstopovername(String sixstopovername) {
			this.sixstopovername = sixstopovername;
		}
		
	}
}

참고적으로 json을 객체로 변환할때 만든 객체는 위와같다.