conf/Catalina/localhost:指定项目的配置信息
1.添加：ROOT.xml
听见Context节点：
<Context docBase="/usr/local/tomcat7/COMMON-ROOT" ></Context>
访问路径：
http://localhost:8080 访问的就是projects/COMMON-ROOT 下面的
还可以添加多个, 如：mobile.xml
访问路径：http://localhost:8080/mobile tomcat7访问管理页面
需要修改 conf目录下tomcat-users.xml配置
<tomcat-users>
<!--
NOTE: By default, no user is included in the "manager-gui" role required
to operate the "/manager/html" web application. If you wish to use this app,
you must define such a user - the username and password are arbitrary.
-->
<!--
NOTE: The sample user and role entries below are wrapped in a comment
and thus are ignored when reading this file. Do not forget to remove
<!.. ..> that surrounds them.
-->
<role rolename="tomcat"/>
<role rolename="role1"/>
<role rolename="manager"/>
<user username="admin" password="" roles="manager-gui"/>
</tomcat-users>
这里的配置跟tomcat6略有不同
注意:需要将admin用户的roles改为"manager-gui"