报错内容：
org.apache.jasper.JasperException: /webpage/include/common.jsp (line: 1, column: 2) Page directive: illegal to have multiple occurrences of contentType with different values (old: text/html; charset=UTF-8, new: text/html;charset=UTF-8)
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.
at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.
at org.apache.jasper.compiler.Node$PageDirective.accept(Node.
at org.apache.jasper.compiler.Node$Nodes.visit(Node.
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.
at org.apache.jasper.compiler.Node$Visitor.visit(Node.
at org.apache.jasper.compiler.Node$Root.accept(Node.
at org.apache.jasper.compiler.Node$Nodes.visit(Node.
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.
at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.
at org.apache.jasper.compiler.Node$IncludeDirective.accept(Node.
at org.apache.jasper.compiler.Node$Nodes.visit(Node.
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.
at org.apache.jasper.compiler.Node$Visitor.visit(Node.
at org.apache.jasper.compiler.Node$Root.accept(Node.
at org.apache.jasper.compiler.Node$Nodes.visit(Node.
at org.apache.jasper.compiler.Validator.validateDirectives(Validator.
at org.apache.jasper.compiler.Compiler.generate
at org.apache.jasper.compiler.Compiler.compile(Compiler.
at org.apache.jasper.compiler.Compiler.compile(Compiler.
at org.apache.jasper.compiler.Compiler.compile(Compiler.
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.
at org.apache.jasper.servlet.JspServlet.service(JspServlet.
at
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.
at
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.
at
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.
at com.opensymphony.sitemesh.webapp.SiteMeshFilter.obtainContent(SiteMeshFilter.
at com.opensymphony.sitemesh.webapp.SiteMeshFilter.doFilter(SiteMeshFilter.
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.
at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.
at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.
at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.
at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.
at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandle
r.process(AbstractProtocol.
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.
at
at
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.
at
原因：
被包含JSP的＜%@ page %＞要与当前页面的对应内容保持一致