在JBoss AS 7中将项目指定至'/'根目录

1.创建WEB-INF/jboss-web.xml文件，全部内容如下： 

 <?xml version="1.0" encoding="UTF-8"?>
 <jboss-web>
     <context-root>/</context-root>
 </jboss-web>

2.修改/jboss-as-7.0.0.Final/standalone/configuration/standalone.xml文件 
在文件的最后找到 

 <subsystem xmlns="urn:jboss:domain:web:1.0" default-virtual-server="default-host">
   <connector name="http" scheme="http" protocol="HTTP/1.1" socket-binding="http"/>
   <virtual-server name="default-host" enable-welcome-root="true">
     <alias name="localhost" />
     <alias name="example.com" />
   </virtual-server>
 </subsystem>

将enable-welcome-root="true"删除 
否则启动时会抛出"Child container with name  already exists"错误