我自己搜到的几处连接:
http://www.java-cn.com/bbs-jsp/show.jsp?id=4416&forum=javafan80130
http://www.webtechina.com/bbs/showthread.php?threadid=2887&highlight=%CA%FD%BE%DD%BF%E2
http://www.zhuodau.org/bbs/message.php?forumID=4&&threadID=3360&mp=1
http://www.java-cn.com/bbs-jsp/show.jsp?id=4416&forum=javafan80130
http://www.webtechina.com/bbs/showthread.php?threadid=2887&highlight=%CA%FD%BE%DD%BF%E2
http://www.zhuodau.org/bbs/message.php?forumID=4&&threadID=3360&mp=1
得到的结论:tomcat的默认的web应用目录不同于用户自建的web应用目录。可能的原因可能是server.xml中的这段
<Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">