第一步：打开ActiveMQ 安装目录下的conf 文件夹，打开conf/jetty.xml,
<bean id="securityConstraint" class="org.eclipse.jetty.util.security.Constraint">
<property name="name" value="BASIC" />
<property name="roles" value="admin" />
<property name="authenticate" value="true" />
</bean>
将property name 为authenticate的属性值value ="false",修改为value ="true"。其含义是：启动登入安全认证机制
第二步：配置ActiveMQ 安全登入账户和密码
控制ActiveMQ 安全登入的账户和密码信息保存在，conf/jetty-real.properties配置文件中。
## ---------------------------------------------------------------------------
## 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.
## ---------------------------------------------------------------------------
# Defines users that can access the web (console, demo, etc.)
# username: password [,rolename ...]
admin: admin, admin
语法格式：
账户 ： 密码 [角色]
ActiveMQ 系统自带默认账户：admin,密码：admin，角色：admin。
