autowired된 객체가 특정 메서드 안에만 들어가면 nullpoint 됩니다.

Question

컨트롤러&#64;Controller&#64;RequestMapping(value &#61; &#34;sns/*&#34;)public class SNSController { &#64;Autowired HttpSession session; &#64;Autowired SNSService nservice; &#64;RequestMapping(value &#61; &#34;/postForm&#34;, method &#61; RequestMethod.POST) public ModelAndView postForm(&#64;RequestParam(&#34;calNum&#34;) String calnum) { ModelAndView mav &#61; new ModelAndView(); mav.addObject(&#34;calnum&#34;, calnum); mav.setViewName(&#34;postForm&#34;); nservice.test(); //이부분의 test();는 잘 실행됨 return mav; } &#64;RequestMapping(value &#61; &#34;/post&#34;, method &#61; RequestMethod.POST) public ModelAndView post(&#64;ModelAttribute(&#34;tl&#34;) Timeline timeline) { timeline.setT_cc_code(session.getAttribute(&#34;code&#34;).toString()); System.out.println(&#34;테스트 : &#34;&#43;timeline.getT_content()); nservice.test(); //이부분을 주석처리하면 잘 실행됨 주석처리 하지 않으면 nullpoint ModelAndView mav &#61; new ModelAndView(); mav.setViewName(&#34;postresult&#34;); return mav; } }에러 로그심각: Servlet.service() for servlet [appServlet] in context with path [/www] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root causejava.lang.NullPointerException at com.chicknest.www.SNSController.post(SNSController.java:37) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) 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:967) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) 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:648) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1132) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1539) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1495) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Unknown Source)

하느아리 · Accepted Answer

위 에러 통째로 구글링 하니까 http://8boknote.tistory.com/17 쿼리에 null값이 들어갔을때 나는 문제라네요....

하느아리 · Answer

SNSController.java:3737라인이 저 부분이 맞나요 ????

chqhroqkfwk · Answer

System.out.println(&#34;테스트 : &#34;&#43;timeline.getT_content());nservice.test(); //이부분을 주석처리하면 잘 실행됨 주석처리 하지 않으면 nullpoint이 부분이 37행은 아닌데 여기를 주석처리하면 실행이 됩니다. 37행은 클래스에서 마지막 중괄호가 닫히는 부분입니다. 그리고 제가 디버깅을 돌려 봤는데 그때는 f6을 눌러서 한행씩 실행시켰을때는 저 부분이에러가 없이 실행되고 넘어갑니다. 도대체 왜 그런지 모르겠습니다ㅜㅜ

chqhroqkfwk · Answer

.test()는 db랑은 상관 없는 메서든데 왜 그런지 모르겠네요... 분명 이 부분에서 에러가 나는데;;한번 쿼리쪽을 살펴 볼게요 감사합니다~

chqhroqkfwk · Answer

프로젝트 클린하니까 해결 됐네요;;; 전에 발생했던 에러가 또 발생했던것 같습니다;;;;

하느아리 · Answer

ㅎㅎㅎㅎㅎㅎㅎ그래도 해결됐으니 축하드려요~~

autowired된 객체가 특정 메서드 안에만 들어가면 nullpoint 됩니다.

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