java.lang.IllegalStateException: No output folder

tomcat 7环境变量配置好了，jdk运行正常，为什么访问本地服务器出现这问题？  

关键是在MyEclipse中启动tomcat会出问题，但是单独启动tomcat又木有问题，折腾了几天。特记！

HTTP Status 500 - java.lang.IllegalStateException: No output folder
typeException report
messagejava.lang.IllegalStateException: No output folder
descriptionThe server encountered an internal error that prevented 
it from fulfilling this request.
exceptionorg.apache.jasper.JasperException: java.lang.IllegalStateException: No output folder
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:585)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:391)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
root causejava.lang.IllegalStateException: No output folder
org.apache.jasper.JspCompilationContext.createOutputDir(JspCompilationContext.java:738)
org.apache.jasper.JspCompilationContext.getOutputDir(JspCompilationContext.java:196)
org.apache.jasper.JspCompilationContext.getClassFileName(JspCompilationContext.java:581)
org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:461)
org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:425)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:639)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
noteThe full stack trace of the root cause is available in the 
Apache Tomcat/7.0.39 logs.

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org.apache.jasper.JasperException: java.lang.IllegalStateException: No output folder:
关于这个原因主要是权限的问题，在tomcat/work/Catalina/localhost/，主要是这个目录没有被读写的权限，导致文件不能被编译到该指定的工作目录中，此时我们就要针对与这个目录做一些权限的修改权限至少要达到755或者以上，同时注意此处修改权限必须用root身份进行操作，否则不能进行修改，修改完后编译好的jsp文件就在localhost的目录当中了

发现了问题在于work/Catalina/localhost/中无法生成对应文件，把tomcat整个目录、work整个目录都修改了权限仍然不行。最后到具体的目录tomcat/work/Catalina/localhost/进行修改权限OK