我已经在 Windows 7 上安装了 tomcat 7。我想部署 .war 文件。在浏览了一些与登录 tomcat 管理器相关的博客和网页之后，我对 conf/tomcat-users.xml 文件进行了更改，现在它看起来如下：
<?xml version='1.0' encoding='cp1252'?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<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="admin"/>
<role rolename="manager"/>
<user username="tomcat" password="tomcat" roles="tomcat"/>
<user username="both" password="tomcat" roles="tomcat,role1"/>
<user username="role1" password="tomcat" roles="role1"/>
-->
<role rolename="tomcat"/>
<role rolename="role1"/>
<role rolename="admin"/>
<role rolename="manager"/>
<role rolename="manager-gui"/>
<user username="abc" password="abc" roles="manager-gui,admin,manager,tomcat,role1"/>
</tomcat-users>
然后我重新启动 localhost:8080 并单击管理器应用程序按钮，然后显示登录屏幕，我输入了上面 .xml 文件中存在的登录详细信息（abc）。但我仍然无法登录。我需要做什么才能登录成功地。