运行正常的一个WEB项目，在jbuilder无法正常显示出主页index.jsp
用jbuilder编译项目时，全部jsp文件都能编译，就是无法自动显示出结果的主页

在IE下输入   http://localhost:8080/xiangmu/可以正常运行，会显示项目主页，说明我c盘的tomcat可以用啊

在jbuilder下就出错了，有以下信息


C:\Borland\JBuilder2006\jdk1.5\bin\javaw   -classpath   "C:\Borland\JBuilder2006\thirdparty\jakarta-tomcat-5.5.9\bin\bootstrap.jar;C:\Borland\JBuilder2006\jdk1.5\lib\tools.jar "     "-Dcatalina.home=C:/Borland/JBuilder2006/thirdparty/jakarta-tomcat-5.5.9 "     org.apache.catalina.startup.Bootstrap   -config   F:\案例精选\mingrisoft\vendition\Tomcat\conf\server8089.xml   start  
2007-5-23   20:05:53   org.apache.coyote.http11.Http11Protocol   init
信息:   Initializing   Coyote   HTTP/1.1   on   http-8089
2007-5-23   20:05:53   org.apache.catalina.startup.Catalina   load
信息:   Initialization   processed   in   609   ms
2007-5-23   20:05:53   org.apache.catalina.core.StandardService   start
信息:   Starting   service   Catalina
2007-5-23   20:05:53   org.apache.catalina.core.StandardEngine   start
信息:   Starting   Servlet   Engine:   Apache   Tomcat/5.5.9
2007-5-23   20:05:53   org.apache.catalina.core.StandardHost   start
信息:   XML   validation   disabled
2007-5-23   20:05:53   org.apache.catalina.realm.JAASRealm   setContainer
信息:   Set   JAAS   app   name   Catalina
2007-5-23   20:05:53   org.apache.coyote.http11.Http11Protocol   start
信息:   Starting   Coyote   HTTP/1.1   on   http-8089
2007-5-23   20:05:53   org.apache.catalina.startup.Catalina   start
信息:   Server   startup   in   922   ms
2007-5-23   20:05:54   org.apache.catalina.core.StandardWrapperValve   invoke
严重:   Servlet.service()   for   servlet   managerservlet   threw   exception
java.lang.NumberFormatException:   null
at   java.lang.Integer.parseInt(Integer.java:415)
at   java.lang.Integer.parseInt(Integer.java:497)
at   com.webtier.ManagerServlet.doGet(ManagerServlet.java:27)
at   javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at   javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at   org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at   org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at   org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at   org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at   org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at   org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at   org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at   org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at   org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at   org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at   org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at   org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) <