浏览jsp时出现问题

这是ie的提示信息:
帮我看看是什么毛病

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:414)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
    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)
    net.umsoft.grantDemo.util.MyFilter.doFilter(MyFilter.java:36)


root cause

Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK
    org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(CompilerAdapterFactory.java:106)
    org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:935)
    org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:764)
    org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:382)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
    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)
    net.umsoft.grantDemo.util.MyFilter.doFilter(MyFilter.java:36)


note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.


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Apache Tomcat/5.0.28

检查你的JAVA_HOME是否正确。。

嗯,,对的,,JDK的配置,.......

在环境变量中新建用户变量，指定变量名为：java_home,变量值为：JDK路径

我已经配置

是这样的，我把jdk装在了D盘TOOLS下

JAVA_HOME=D:\TOOL
path=%JAVA_HOME%\bin
classpaht=.;=%JAVA_HOME%\lib\dt.jar;  .....................等

之后，我编了一个java文件，在DoS下经过编绎( javac HelloWord.java )
解释正确显示

这个问题出了两种情况

手动把tomcat服务启动，打开IE后sp页面可以浏览了;
用myeclipse进行操作，在其里面启动tomcat服务后，在IE里浏览jsp就不可以，
这是怎么个情况哩？~

ie设置了代理服务器没？

我的ie没有设置代理服务器,
电脑上了网啊的

红色的地方应该是JAVA_HOME =D:\TOOL\(jdk) 吧？其实错误它都写得很清楚了，"JAVA_HOME没有指向jdk"

用eclipse+tomcat吧!!!就不用设置什么环境变量啊.