multipartRequest.getParameterNames() 이 부분에서..

Question

에러는 아닌데 노란줄이 떠서 커서를 올려보니 Type safety: The expression of type Enumeration needs unchecked conversion to conform to Enumeration<String> 라는 문구가 뜹니다. @SuppressWarnings ( "unchecked" )를 통해 노란줄을 없애도 500에러가 뜹니다. 아마 데이터 문제같은데 어디를 봐야할지 잘모르겠어요ㅜㅜ

tldn0101 · Answer

선생님 빠른 답장 너무 감사합니다. uploadForm.jsp에서 < form class = "form-horizontal" action = " < c:url value = '/upload.do' /> " enctype = "multipart/form-data" method = "post" >이 부분에서 mulitpart/form-data로 오타가 있었습니다. 이런거로 질문해서 죄송합니다. 좋은 하루 보내십시오!

박매일 · Answer

코드에 노란줄이 나는부분은 에러가 아니면 크게 상관은 없습니다. 노란색 부분을 없애기 위해서는 자세한 메세지를 봐야겠지만 일단 @SuppressWarnings ( "unchecked" ) 이부분은 하지마시고 코드에 Enumeration 부분에서 이 들어가 있는지 확인해보시고 업로드 API가 정확하게 import되었는지도 한번 확인해보시면 좋겠습니다.^^

tldn0101 · Answer

혹시몰라 콘솔에 에러도 첨부합니다. 감사합니다. 심각: 경로 [/myapp1]의 컨텍스트 내의 서블릿 [appServlet]을(를) 위한 Servlet.service() 호출이, 근본 원인(root cause)과 함께, 예외 [Request processing failed; nested exception is java.lang.IllegalStateException : Current request is not of type [org.springframework.web.multipart.MultipartHttpServletRequest]: org.apache.catalina.connector.RequestFacade@23d321de]을(를) 발생시켰습니다. java.lang.IllegalStateException : Current request is not of type [org.springframework.web.multipart.MultipartHttpServletRequest]: org.apache.catalina.connector.RequestFacade@23d321de at org.springframework.web.servlet.mvc.method.annotation.ServletRequestMethodArgumentResolver.resolveArgument( ServletRequestMethodArgumentResolver.java:84 ) at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument( HandlerMethodArgumentResolverComposite.java:75 ) at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues( InvocableHandlerMethod.java:156 ) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest( InvocableHandlerMethod.java:117 ) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle( ServletInvocableHandlerMethod.java:96 ) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod( RequestMappingHandlerAdapter.java:617 ) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal( RequestMappingHandlerAdapter.java:578 ) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle( AbstractHandlerMethodAdapter.java:80 ) at org.springframework.web.servlet.DispatcherServlet.doDispatch( DispatcherServlet.java:923 ) at org.springframework.web.servlet.DispatcherServlet.doService( DispatcherServlet.java:852 ) at org.springframework.web.servlet.FrameworkServlet.processRequest( FrameworkServlet.java:882 ) at org.springframework.web.servlet.FrameworkServlet.doPost( FrameworkServlet.java:789 ) at javax.servlet.http.HttpServlet.service( HttpServlet.java:660 ) 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:52 ) 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.CharacterEncodingFilter.doFilterInternal( CharacterEncodingFilter.java:88 ) at org.springframework.web.filter.OncePerRequestFilter.doFilter( OncePerRequestFilter.java:76 ) 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:199 ) at org.apache.catalina.core.StandardContextValve.invoke( StandardContextValve.java:96 ) at org.apache.catalina.authenticator.AuthenticatorBase.invoke( AuthenticatorBase.java:543 ) at org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:139 ) at org.apache.catalina.valves.ErrorReportValve.invoke( ErrorReportValve.java:81 ) at org.apache.catalina.valves.AbstractAccessLogValve.invoke( AbstractAccessLogValve.java:690 ) at org.apache.catalina.core.StandardEngineValve.invoke( StandardEngineValve.java:87 ) at org.apache.catalina.connector.CoyoteAdapter.service( CoyoteAdapter.java:343 ) at org.apache.coyote.http11.Http11Processor.service( Http11Processor.java:615 ) at org.apache.coyote.AbstractProcessorLight.process( AbstractProcessorLight.java:65 ) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process( AbstractProtocol.java:818 ) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun( NioEndpoint.java:1627 ) 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 )