一个war，发布到Tomcat7上出现问题，首页就进不去，请问该怎么办？
错误如下：另外想问下，下面这种错误究竟怎么才能看明白，万谢！

[ServletException in:/page/jsp/template/block.jsp] org.apache.jsp.page.jsp.template.block_jsp' java.lang.ClassNotFoundException: org.apache.jsp.page.jsp.template.block_jsp at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:143) at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:172) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:605) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:544) at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:954) at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:652) at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:138) at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:152) at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:138) at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:756) at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:881) at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:473) at org.apache.jsp.page.jsp.user.login.index_jsp._jspx_meth_tiles_005finsert_005f0(index_jsp.java:132) at org.apache.jsp.page.jsp.user.login.index_jsp._jspService(index_jsp.java:77) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.j