请问各位大哥,我这电脑是怎么回事,为什么不能运行JSP

本人先装了JAVA
通过java javac java测试正常...
然后开始装TOMACT
为什么装了后,不能运行jsp文件呢??????????????

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)
这问这是哪里没设置好呢

是不是没有设置 java_home 环境变量

Tomcat 装错了..
在装时,有个JAVA虚拟机路径的选择....这个路径没选好....

选好JAVA路径后OK了

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

楼上的兄弟们说的应该没有错！仔细看看你的配置吧！