tomcat-users.xml配置文件中找到
<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"/>
<user
username="tomcat" password="tomcat" roles="tomcat"/>
<user username="both" password="tomcat"
roles="tomcat,role1"/>
<user username="role1" password="tomcat" roles="role1"/>
-->
<!--添加用户名和密码设置 -->
<role rolename="manager-gui"
/>
<user
username="admin" password="admin"
roles="manager-gui"/>
</tomcat-users>
TOMCAT 7配置问题 403 Access Denied
原文：http://www.cnblogs.com/shawnwxm/p/3539092.html