小问题！求帮助！
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)


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)


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

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我的path=C:\Program   Files\Java\jdk1.5.0_04\bin;C:\Program   Files\Microsoft   SQL   Server\80\Tools\BINN
      classpath=.;C:\Program   Files\Java\jdk1.5.0_04\lib\tools.jar;C:\Program   Files\Java\jdk1.5.0_04\lib\dt.jar
  我能运行和编译helloword文件！
　但运行ＪＳＰ文件就出现上面这个问题！！
　　这个jsp文件是朋友做好了的！我只是配置出来看能不能运行！web．xml也应该没的问题！！不怎么怎么起的！！求帮助！！谢谢

------解决方案--------------------
首先确认 你装了几个jdk，然后确认你的jdk配置是否正确！！！
------解决方案--------------------
你的TOMCAT呢,,我没有看到呀,,,
------解决方案--------------------
500错误一般都是配置文件写的有问题 你好好检查一下你的配置文件 仅供参考我也是初学者
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this reque