tomcat7配置用户的一点问题

tomcat7配置用户时，与tomcat6不同。
会有一个错误。



1、tomcat不配置conf/tomcat-users.xml或者配置不对时。会发生以下错误：

点击这三个功能时：

报一下错误：

2、tomcat配置conf/tomcat-users.xml：

解决办法：
<role rolename="manager-gui"/>
<user username="tomcat" password="s3cret" roles="manager-gui"/>
 Note that for Tomcat 7 onwards, the roles required to use the manager application were changed from the single manager role to the following four roles. You will need to assign the role(s) required for the functionality you wish to access.


    manager-gui - allows access to the HTML GUI and the status pages
    manager-script - allows access to the text interface and the status pages
    manager-jmx - allows access to the JMX proxy and the status pages
    manager-status - allows access to the status pages only




本例添加：
<role rolename="manager"/>  
<role rolename="manager-gui"/>  
<role rolename="admin"/>  
<role rolename="admin-gui"/>  

<user username="tomcat" password="tomcat" roles="admin-gui,admin,manager-gui,manager"/>

正确显示：