RestTemplate 400오류 발생

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카카오페이를 테스트중인데 결제를 요청하고 결제 연동부분까지는 진행이 되었는데 pg_token값을 받아 db에 update하고 db에서 값을 받아와 RestTemplate으로 결제 승인 요청을 보내면 400오류가 발생했다면서 더이상 진행이 안됩니다.정확히 어디서 문제가 발생했는지 봐주실 수 있을까요? @RequestMapping(value = "approval") public String paymentApproval(HttpServletRequest request) throws Exception{ String partner_order_id = request.getParameter("partner_order_id").toString(); String pg_token = request.getParameter("pg_token").toString(); System.out.println(pg_token); System.out.println(partner_order_id); int result = paymentsService.updateToken(partner_order_id, pg_token); if(result != 0) { PaymentsVO paymentsVO = new PaymentsVO(); paymentsVO = paymentsService.selectOne(partner_order_id); String response = paymentsService.paymentApproval(paymentsVO); if(response.equals("Approval Success!")) { return "결제 승인 완료"; }else { return "결제 승인 실패"; } } return "토큰 저장 실패"; }controller @ResponseBody public String paymentApproval(PaymentsVO paymentsVO) throws Exception{ RestTemplate restTemplate = new RestTemplate(); HttpHeaders headers = new HttpHeaders(); headers.add("Authorization","KakaoAK 5b6404f298695c304ae950cb9156ba35"); headers.add("Accept",MediaType.APPLICATION_JSON_VALUE+";charset=UTF-8"); headers.add("Content-Type",MediaType.APPLICATION_FORM_URLENCODED_VALUE+";charset=utf-8"); MultiValueMap params = new LinkedMultiValueMap(); params.add("cid", "TC0ONETIME"); params.add("tid", paymentsVO.getTid()); params.add("partner_order_id", paymentsVO.getPartner_order_id()); params.add("partner_user_id", paymentsVO.getPartner_user_id()); params.add("pg_token", paymentsVO.getPg_token()); HttpEntity> body = new HttpEntity>(params,headers); String response = restTemplate.postForObject(new URI(HOST + "/v1/payment/approve"), body, String.class); System.out.println(response); JSONParser jsonParser = new JSONParser(); JSONObject js = (JSONObject)jsonParser.parse(response); String aid = js.get("aid").toString(); if(!aid.isEmpty()) { return "Approval Success!"; } return js.get("msg").toString(); }service public PaymentsVO selectOne(String partner_order_id) throws Exception{ PaymentsVO paymentsVO = new PaymentsVO(); paymentsVO = sqlSession.selectOne(NAMESPACE+"selectOne", partner_order_id); System.out.println(paymentsVO.getCid()); return paymentsVO; }dao update payment set pg_token=#{pg_token} where partner_order_id=#{partner_order_id} mapperprint문으로 출력했을 db에서 받아온 값을 제대로 출력하고 오류가 발생하는 부분은 . String response = restTemplate.postForObject(new URI(HOST +"/v1/payment/approve"), body, String.class);이 부분에서 발생합니다. 심각: 경로 [/s12]의 컨텍스트 내의 서블릿 [appServlet]을(를) 위한 Servlet.service() 호출이, 근본 원인(root cause)과 함께, 예외 [Request processing failed; nested exception is org.springframework.web.client.HttpClientErrorException: 400 Bad Request]을(를) 발생시켰습니다. org.springframework.web.client.HttpClientErrorException: 400 Bad Request at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91) at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:667) at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:620) at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:595) at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:398) at com.shunyk.payments.PaymentsService.paymentApproval(PaymentsService.java:84) at com.shunyk.s12.KakaoController.paymentApproval(KakaoController.java:60) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)이건 오류 코드 전문입니다

스트라 · Answer

RestTemplate은 4XX, 5XX 번대 HTTP 상태 코드가 넘어오면 Exception을 발생시키는데,커스텀 에러 핸들러를 사용하면 Exception 을 처리할 수 있어요.아래 링크 참고해보세요.https://kwonnam.pe.kr/wiki/springframework/resttemplate 참고로 저는 위 링크 본문에 있듯이 DefaultResponseErrorHandler 만 상속받아서Exception 발생하지 않게만하고 사용 중입니다.

ShunyK · Answer

스트라 감사합니다!

RestTemplate 400오류 발생

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