회원인증프로그래밍에서 받은 코드로 실습하는데 에러나네요

회원가입화면에서 에러납니다.

에러코드

'''

javax.naming.NameNotFoundException: Name [jdbc/Oracle11g] is not bound in this Context. Unable to find [jdbc].

at org.apache.naming.NamingContext.lookup(NamingContext.java:825)

at org.apache.naming.NamingContext.lookup(NamingContext.java:159)

at org.apache.naming.NamingContext.lookup(NamingContext.java:836)

at org.apache.naming.NamingContext.lookup(NamingContext.java:159)

at org.apache.naming.NamingContext.lookup(NamingContext.java:836)

at org.apache.naming.NamingContext.lookup(NamingContext.java:173)

at org.apache.naming.SelectorContext.lookup(SelectorContext.java:156)

at javax.naming.InitialContext.lookup(Unknown Source)

at com.javalec.ex.MemberDao.getConnection(MemberDao.java:209)

at com.javalec.ex.MemberDao.confirmId(MemberDao.java:71)

at org.apache.jsp.joinOk_jsp._jspService(joinOk_jsp.java:104)

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

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1136)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)

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)

java.lang.NullPointerException

at com.javalec.ex.MemberDao.confirmId(MemberDao.java:72)

at org.apache.jsp.joinOk_jsp._jspService(joinOk_jsp.java:104)

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

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1136)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)

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)

java.lang.NullPointerException

at com.javalec.ex.MemberDao.confirmId(MemberDao.java:84)

at org.apache.jsp.joinOk_jsp._jspService(joinOk_jsp.java:104)

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

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1136)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)

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)

javax.naming.NameNotFoundException: Name [jdbc/Oracle11g] is not bound in this Context. Unable to find [jdbc].

at org.apache.naming.NamingContext.lookup(NamingContext.java:825)

at org.apache.naming.NamingContext.lookup(NamingContext.java:159)

at org.apache.naming.NamingContext.lookup(NamingContext.java:836)

at org.apache.naming.NamingContext.lookup(NamingContext.java:159)

at org.apache.naming.NamingContext.lookup(NamingContext.java:836)

at org.apache.naming.NamingContext.lookup(NamingContext.java:173)

at org.apache.naming.SelectorContext.lookup(SelectorContext.java:156)

at javax.naming.InitialContext.lookup(Unknown Source)

at com.javalec.ex.MemberDao.getConnection(MemberDao.java:209)

at com.javalec.ex.MemberDao.insertMember(MemberDao.java:38)

at org.apache.jsp.joinOk_jsp._jspService(joinOk_jsp.java:113)

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

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1136)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)

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)

java.lang.NullPointerException

at com.javalec.ex.MemberDao.insertMember(MemberDao.java:39)

at org.apache.jsp.joinOk_jsp._jspService(joinOk_jsp.java:113)

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

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1136)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)

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)

'''