Simple JSON parser() 메서드 리턴타입 이슈

Question

수고하십니다. Java Simple JSON Parser API를 이용하여 String 문자열을 JSON 으로 파싱하고 있습니다. 리턴타입결과가 JSONObject 나 JSONArray가 아니라 결과가 String으로 나오고 있습니다.JUnit에서 테스트했을경우 정상적으로 JSONObject로 파싱되고 있습니다. parse() 메서드의 리턴타입이 왜 String 으로 리턴되는지... (멘붕이네여..)(AAPI : com.googlecode.json-simple 1.1.1)import org.json.simple.JSONObject; import org.json.simple.parser.JSONParser; import org.json.simple.parser.ParseException; private JSONObject JSONSimpleParser(String json) throws ParseException { logger.info(&#34;JSON String : 
 &#34;&#43;json); JSONObject jsonObj &#61; null; try { JSONParser parser &#61; new JSONParser(); Object obj &#61; parser.parse(json); logger.info(&#34;obj 
&#34; &#43; obj ); logger.info(&#34;obj istanceof Object : &#34;&#43; (obj instanceof Object)); logger.info(&#34;obj istanceof String : &#34;&#43; (obj instanceof String)); logger.info(&#34;obj istanceof JSONObject : &#34;&#43; (obj instanceof JSONObject)); jsonObj &#61; (JSONObject) obj; logger.info(&#34;jsonObj istanceof Object : &#34;&#43; (jsonObj instanceof Object)); logger.info(&#34;jsonObj istanceof JSONObject : &#34;&#43; (jsonObj instanceof JSONObject)); } catch (ParseException e) { logger.error(e.getMessage()); e.printStackTrace(); } logger.info(jsonObj.toJSONString()); return jsonObj; } 로그 JSON String : &#34;{\&#34;notification\&#34;:{\&#34;messageId\&#34;:\&#34;29f7d2b1-9698-5f7f-8f7e-81144d3097e0\&#34;,\&#34;timestamp\&#34;:\&#34;2018-06-21 16:59:20.041\&#34;},\&#34;delivery\&#34;:{\&#34;phoneCarrier\&#34;:\&#34;AT&T\&#34;,\&#34;mnc\&#34;:180,\&#34;destination\&#34;:\&#34;&#43;13055420723\&#34;,\&#34;priceInUSD\&#34;:0.00645,\&#34;smsType\&#34;:\&#34;Transactional\&#34;,\&#34;mcc\&#34;:311,\&#34;providerResponse\&#34;:\&#34;Message has been accepted by phone\&#34;,\&#34;dwellTimeMs\&#34;:1027,\&#34;dwellTimeMsUntilDeviceAck\&#34;:2568},\&#34;status\&#34;:\&#34;SUCCESS\&#34;}&#34; obj {&#34;notification&#34;:{&#34;messageId&#34;:&#34;29f7d2b1-9698-5f7f-8f7e-81144d3097e0&#34;,&#34;timestamp&#34;:&#34;2018-06-21 16:59:20.041&#34;},&#34;delivery&#34;:{&#34;phoneCarrier&#34;:&#34;AT&T&#34;,&#34;mnc&#34;:180,&#34;destination&#34;:&#34;&#43;13055420723&#34;,&#34;priceInUSD&#34;:0.00645,&#34;smsType&#34;:&#34;Transactional&#34;,&#34;mcc&#34;:311,&#34;providerResponse&#34;:&#34;Message has been accepted by phone&#34;,&#34;dwellTimeMs&#34;:1027,&#34;dwellTimeMsUntilDeviceAck&#34;:2568},&#34;status&#34;:&#34;SUCCESS&#34;} INFO 2018-06-29 13:40:51: app.vo.GlobalSNS:233 - obj istanceof Object : true INFO 2018-06-29 13:40:51: app.vo.GlobalSNS:234 - obj istanceof String : true INFO 2018-06-29 13:40:51: app.vo.GlobalSNS:235 - obj istanceof JSONObject : false로그내용을 보면 parse() 메서드의 리턴타입이 Object이고 인스턴스는 String 입니다.예외는 17라인 형변환 하는 곳에서 Exception이 발생합니다. 예외메시지는 java.lang.ClassCastException: java.lang.String cannot be cast to org.json.simple.JSONObject입니다. 왜 파싱하고 리턴 받은 인스턴스가 JSONObject가 아닌거죠 !? 음음 .. 도움요청드려요.. 흑흑흑답변해주시는 분께 미리 감사드립니다.. (__)

Obzect · Answer

JSONParser parser &#61; new JSONParser(); Object obj &#61; parser.parse(json);//JSON데이터를 넣어 JSON Object 로 만들어 준다.JSONObject jsonObject &#61; (JSONObject) parser.parse(jsonInfo); 이렇게 바로 캐스팅하면서 parse 호출해보시면..

언제나봄봄 · Answer

음.. 기존코드 2줄짜리로 1줄로 줄인거 아닌가요?parse() 호출된 인스턴스가 String 인스턴스 여서 문제 입니다..

안개짱 · Answer

하도 이상해서 그대로 복사해서 붙여봤습니다. 매우 잘되는데요. import org.json.simple.JSONObject; import org.json.simple.parser.JSONParser; public static void main(String[] arg) throws org.json.simple.parser.ParseException { String json &#61; &#34;{\&#34;notification\&#34;:{\&#34;messageId\&#34;:\&#34;29f7d2b1-9698-5f7f-8f7e-81144d3097e0\&#34;,\&#34;timestamp\&#34;:\&#34;2018-06-21 16:59:20.041\&#34;},\&#34;delivery\&#34;:{\&#34;phoneCarrier\&#34;:\&#34;AT&T\&#34;,\&#34;mnc\&#34;:180,\&#34;destination\&#34;:\&#34;&#43;13055420723\&#34;,\&#34;priceInUSD\&#34;:0.00645,\&#34;smsType\&#34;:\&#34;Transactional\&#34;,\&#34;mcc\&#34;:311,\&#34;providerResponse\&#34;:\&#34;Message has been accepted by phone\&#34;,\&#34;dwellTimeMs\&#34;:1027,\&#34;dwellTimeMsUntilDeviceAck\&#34;:2568},\&#34;status\&#34;:\&#34;SUCCESS\&#34;}&#34;; logger.info(&#34;JSON String : 
 &#34;&#43;json); JSONObject jsonObj &#61; null; JSONParser parser &#61; new JSONParser(); Object obj &#61; parser.parse(json); logger.info(&#34;obj 
&#34; &#43; obj ); logger.info(&#34;obj istanceof Object : &#34;&#43; (obj instanceof Object)); logger.info(&#34;obj istanceof String : &#34;&#43; (obj instanceof String)); logger.info(&#34;obj istanceof JSONObject : &#34;&#43; (obj instanceof JSONObject)); jsonObj &#61; (JSONObject) obj; logger.info(&#34;jsonObj istanceof Object : &#34;&#43; (jsonObj instanceof Object)); logger.info(&#34;jsonObj istanceof JSONObject : &#34;&#43; (jsonObj instanceof JSONObject)); logger.info(jsonObj.toJSONString()); } 14:47:33.005 [main] INFO XXX - JSON String : {&#34;notification&#34;:{&#34;messageId&#34;:&#34;29f7d2b1-9698-5f7f-8f7e-81144d3097e0&#34;,&#34;timestamp&#34;:&#34;2018-06-21 16:59:20.041&#34;},&#34;delivery&#34;:{&#34;phoneCarrier&#34;:&#34;AT&T&#34;,&#34;mnc&#34;:180,&#34;destination&#34;:&#34;&#43;13055420723&#34;,&#34;priceInUSD&#34;:0.00645,&#34;smsType&#34;:&#34;Transactional&#34;,&#34;mcc&#34;:311,&#34;providerResponse&#34;:&#34;Message has been accepted by phone&#34;,&#34;dwellTimeMs&#34;:1027,&#34;dwellTimeMsUntilDeviceAck&#34;:2568},&#34;status&#34;:&#34;SUCCESS&#34;} 14:47:33.019 [main] INFO XXX - obj {&#34;notification&#34;:{&#34;messageId&#34;:&#34;29f7d2b1-9698-5f7f-8f7e-81144d3097e0&#34;,&#34;timestamp&#34;:&#34;2018-06-21 16:59:20.041&#34;},&#34;delivery&#34;:{&#34;phoneCarrier&#34;:&#34;AT&T&#34;,&#34;mnc&#34;:180,&#34;destination&#34;:&#34;&#43;13055420723&#34;,&#34;priceInUSD&#34;:0.00645,&#34;smsType&#34;:&#34;Transactional&#34;,&#34;mcc&#34;:311,&#34;providerResponse&#34;:&#34;Message has been accepted by phone&#34;,&#34;dwellTimeMs&#34;:1027,&#34;dwellTimeMsUntilDeviceAck&#34;:2568},&#34;status&#34;:&#34;SUCCESS&#34;} 14:47:33.020 [main] INFO XXX - obj istanceof Object : true 14:47:33.020 [main] INFO XXX - obj istanceof String : false 14:47:33.020 [main] INFO XXX - obj istanceof JSONObject : true 14:47:33.020 [main] INFO XXX - jsonObj istanceof Object : true 14:47:33.020 [main] INFO XXX - jsonObj istanceof JSONObject : true 14:47:33.020 [main] INFO XXX - {&#34;notification&#34;:{&#34;messageId&#34;:&#34;29f7d2b1-9698-5f7f-8f7e-81144d3097e0&#34;,&#34;timestamp&#34;:&#34;2018-06-21 16:59:20.041&#34;},&#34;delivery&#34;:{&#34;phoneCarrier&#34;:&#34;AT&T&#34;,&#34;mnc&#34;:180,&#34;destination&#34;:&#34;&#43;13055420723&#34;,&#34;priceInUSD&#34;:0.00645,&#34;smsType&#34;:&#34;Transactional&#34;,&#34;mcc&#34;:311,&#34;providerResponse&#34;:&#34;Message has been accepted by phone&#34;,&#34;dwellTimeMs&#34;:1027,&#34;dwellTimeMsUntilDeviceAck&#34;:2568},&#34;status&#34;:&#34;SUCCESS&#34;}

LichKing · Answer

똑같은 json으로 테스트해봤는데요. 전 잘 되네요. &#64;Test public void q01() throws ParseException { String json &#61; &#34;{\&#34;notification\&#34;:{\&#34;messageId\&#34;:\&#34;29f7d2b1-9698-5f7f-8f7e-81144d3097e0\&#34;,\&#34;timestamp\&#34;:\&#34;2018-06-21 16:59:20.041\&#34;},\&#34;delivery\&#34;:{\&#34;phoneCarrier\&#34;:\&#34;AT&T\&#34;,\&#34;mnc\&#34;:180,\&#34;destination\&#34;:\&#34;&#43;13055420723\&#34;,\&#34;priceInUSD\&#34;:0.00645,\&#34;smsType\&#34;:\&#34;Transactional\&#34;,\&#34;mcc\&#34;:311,\&#34;providerResponse\&#34;:\&#34;Message has been accepted by phone\&#34;,\&#34;dwellTimeMs\&#34;:1027,\&#34;dwellTimeMsUntilDeviceAck\&#34;:2568},\&#34;status\&#34;:\&#34;SUCCESS\&#34;}&#34;; JSONParser parser &#61; new JSONParser(); Object obj &#61; parser.parse(json); JSONObject jsonObject &#61; (JSONObject) obj; System.out.println(obj.getClass()); System.out.println(jsonObject.getClass()); }

LichKing · Answer

아 위에 이미 저처럼 하신분이 계시군요 ㅋㅋ

언제나봄봄 · Answer

네 로컬 개발 환경에서는 잘되는데요. 테스트 서버에서 배포후 확인하면 위의 문제가 발생하네요..(리턴타입 결과가 String....)OTL.......................... 삽집을 계속해봐야 겠네요... 댓글 달아주신 모든분께 감사합니다. !! &#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;&#61;톰캣서버 로그를 콘솔에 출력시 문자열 상태가 출력화면에서는 {\&#34;notification\&#34;:{\&#34;messageId\&#34;:\&#34;29f7d2b1-9698-5f7f-8f7e-81144d3097e0\&#34;,\&#34;timestamp\&#34;:\&#34;2018-06-21 16:59:20.041\&#34;}, ... } 이런 형태로 출력되었습니다. java에서 \ 는 특수문자를 표현할떄 사용하는 문자열 이므로 실제 스트링 형태는 {\\&#34;notification\\&#34;:{\\&#34;messageId\\&#34;:\\&#34;29f7d2b1-9698-5f7f-8f7e-81144d3097e0\\&#34;,\\&#34;timestamp\\&#34;:\\&#34;2018-06-21 16:59:20.041\\&#34;},... } 이렇게 \가 3개일수도 있다는 생각도 했습니다. 결론은 개발서버에서 안되었습니다. 결론은 json의 문자열 형태 때문에 파싱되지 않았습니다... 내부 배치프로그램에서 외부 api를 호출하므로 parse() 메서드를 직접 스트림에 연결하여 해당 예외는 처리하였습니다. JSONParser parser &#61; new JSONParser(); Process process &#61; Runtime.getRuntime().exec(command); JSONObject jsonObj &#61; (JSONObject) parser.parse(new InputStreamReader(process.getInputStream())); 댓글 달아주신 모든분께 다시한번 감사합니다. !!

Simple JSON parser() 메서드 리턴타입 이슈

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#parser 목록