47: </head>

48: <%

49: CompanyDao dao = new CompanyDao();

50: List<CompanyDto> list = dao.selectAll();

51: %>

52: <body>

53:



Stacktrace:]을(를) 발생시켰습니다.

java.lang.NullPointerException

at com.company.dao.CompanyDao.selectAll(CompanyDao.java:24)

at org.apache.jsp.company.company_005flist_jsp._jspService(company_005flist_jsp.java:174)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1722)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)

at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.base/java.lang.Thread.run(Thread.java:834)

에러코드 이렇게 되는데

아무리 봐도 오타가 내눈에는 안보이는데 좀 도와주라ㅠㅠ

혹시 뭐가 더 필요하면 얘기해줘


게시판 처음 만들어보는데 이거 답이 안나온다ㅠㅠㅠ