org.apache.jasper.JasperException: Unable to compile class f

公司以前做过一个项目，是用tomcat4做的服务，现在要它把移植到高版本，我在5.5上试了，没有成功，现在移植到6.0上，比在5.5上好点，但是还是有问题存在的，如果是静态页子，可以正确访问，但如果是.jsp就不行了，访问正常的静态页子，改成.jsp也不行，页面报如下错误：

HTTP Status 500 - 

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type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

org.apache.jasper.JasperException: Unable to compile class for JSP: 


Stacktrace:
	org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:85)
	org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
	org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:415)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:308)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:273)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:308)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


note The full stack trace of the root cause is available in the Apache Tomcat/6.0.10 logs.


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Apache Tomcat/6.0.10

这个实例没有用到任何框架。