Java使用amqp-client连接rabbitmq服务端，报出如下异常
Exception in thread "main" java.io.IOException
at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:105)
at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:101)
at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:123)
at com.rabbitmq.client.impl.AMQConnection.start(AMQConnection.java:377)
at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:824)
at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:778)
at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:868)
at rq.Producer.main(Producer.java:30)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: com.rabbitmq.client.ShutdownSignalException: connection error; protocol method: #method<connection.close>(reply-code=530, reply-text=NOT_ALLOWED - access to vhost '/' refused for user 'user_admin', class-id=10, method-id=40)
at com.rabbitmq.utility.ValueOrException.getValue(ValueOrException.java:66)
at com.rabbitmq.utility.BlockingValueOrException.uninterruptibleGetValue(BlockingValueOrException.java:32)
at com.rabbitmq.client.impl.AMQChannel$BlockingRpcContinuation.getReply(AMQChannel.java:360)
at com.rabbitmq.client.impl.AMQChannel.privateRpc(AMQChannel.java:225)
at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:117)
... 10 more
定位发现是连接rabbitmq使用的用户没有赋予访问权限，我创建的是admin用户，给admin用户赋予‘/’目录的访问权限就可以，执行如下命令：
sudo rabbitmqctl set_permissions -p / admin '.*' '.*' '.*'
