myeclipse内置tomcat与外置tomcat，在启动项目时，产生了不同反应。未解决

xlfm22

　　在eclipse里面。
　　启动内置tomcat运行项目，通过myeclipse内置的浏览器可以进行浏览操作。但是用外部浏览器，会出现如下错误。
　　type Exception report
　　message
　　description The server encountered an internal error () that prevented it from fulfilling this request.
　　exception

org.apache.jasper.JasperException: java.lang.IllegalStateException: No output folder
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:538)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:364)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:88)

　　
　　root cause

java.lang.IllegalStateException: No output folder
org.apache.jasper.JspCompilationContext.createOutputDir(JspCompilationContext.java:678)
org.apache.jasper.JspCompilationContext.getOutputDir(JspCompilationContext.java:197)
org.apache.jasper.JspCompilationContext.getClassFileName(JspCompilationContext.java:514)
org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:453)
org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:399)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:585)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:88)



这是怎么回事事儿呢？