tomcat5.5+jdon3

2007-11-03 21:20:35,328 org.apache.commons.digester.Digester.error(Digester.java:1439) Parse Error at line 2 column 15: Document is invalid: no grammar found.
org.xml.sax.SAXParseException: Document is invalid: no grammar found.
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2007-11-03 21:20:35,343 org.apache.commons.digester.Digester.error(Digester.java:1439) Parse Error at line 2 column 15: Document root element "struts-config", must match DOCTYPE root "null".
org.xml.sax.SAXParseException: Document root element "struts-config", must match DOCTYPE root "null".
启动是出现这种错误怎么解决?

struts-config配置文件语法错误。

对的,谢谢.我本来想去找一本书看一下jboss的,但我发现那样的书不多,于是想在tomcat上运行,而且对我机子来说,JBoss太占内在了,虽然他支持EJB,热布署等,而tomcat占的内在要小很多,而且好像比tomcat要简单一点.