硅酸锌涂料耐高温么:tomcat 和 Eclipse 配置问题 JSP仍然无法打开(编程)

已在Eclipse里新建了Tomcat 项目
我在这里搜过和我差不多的贴子,但仍然解决不了,

运行每个JSP 页面均出现如下错误:
望高手解决

HTTP Status 500 -

--------------------------------------------------------------------------------

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
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:97)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:346)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:434)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:492)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:471)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:459)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

Compile failed; see the compiler error output for details.
org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:938)
org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:758)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:402)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:492)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:471)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:459)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.29 logs.
代码是正确的,但就是每个JSP也是这样..