什么原因会导致下面错误。。。
type   Exception   report

message  

description   The   server   encountered   an   internal   error   ()   that   prevented   it   from   fulfilling   this   request.

exception  

org.apache.jasper.JasperException:   /index_Top.jsp(1,1)   Page   directive:   can 't   have   multiple   occurrences   of   contentType
at   org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:83)
at   org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:363)
at   org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:137)
at   org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:179)
at   org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:564)
at   org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2142)
at   org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2184)
at   org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2190)
at   org.apache.jasper.compiler.Node$Root.accept(Node.java:471)
at   org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2142)
at   org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2184)
at   org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:142)
at   org.apache.jasper.compiler.Node$IncludeDirective.accept(Node.java:612)
at   org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2142)
at   org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2184)
at   org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2190)
at   org.apache.jasper.compiler.Node$Root.accept(Node.java:471)
at   org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2142)
at   org.apache.jasper.compiler.Validator.validate(Validator.java:1462)
at   org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:264)
at   org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
at   org.apache.jasper.compiler.Compiler.compile(Compiler.java:444)
at   org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:603)
at   org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:300)
at   org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:293)
at   org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
at   javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at   org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:286)
at   org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at   org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at   org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:562)
at   org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:974)
at   org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:205)
at   org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:562)
at   org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:974)
at   org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:177)
at   org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at   org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)