从jdk1.5转到1.42_08，tomcat6.0转到5.0，运行原来的工程报如下错误，是什么问题？

StandardWrapperValve[debugjsp]: Servlet.service() for servlet debugjsp threw exception
org.apache.jasper.JasperException: Unable to compile class for JSPGenerated servlet error:
    [javac] javac: invalid flag: 5.0/common/endorsed
    [javac] Usage: javac <options> <source files>
    [javac] where possible options include:
    [javac]   -g                        Generate all debugging info
    [javac]   -g:none                   Generate no debugging info
    [javac]   -g:{lines,vars,source}    Generate only some debugging info
    [javac]   -nowarn                   Generate no warnings
    [javac]   -verbose                  Output messages about what the compiler is doing
    [javac]   -deprecation              Output source locations where deprecated APIs are used
    [javac]   -classpath <path>         Specify where to find user class files
    [javac]   -sourcepath <path>        Specify where to find input source files
    [javac]   -bootclasspath <path>     Override location of bootstrap class files
    [javac]   -extdirs <dirs>           Override location of installed extensions
    [javac]   -d <directory>            Specify where to place generated class files
    [javac]   -encoding <encoding>      Specify character encoding used by source files
    [javac]   -source <release>         Provide source compatibility with specified release
    [javac]   -target <release>         Generate class files for specific VM version
    [javac]   -help                     Print a synopsis of standard options at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:437)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:497)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:476)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:464)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
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 cn.com.victorysoft.sys.platform.SetEncoding.doFilter(SetEncoding.java:131)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:534)