[paho-dev] Can MQTT publsih file example pdf or txt instead of messsage

[fang peiyuan <fang_peiyuan@xxxxxxxxx>]

hi sir/mdm

my name is peiyuan, currently i am interested in learning how to use mqtt. I am able to write publish and subscriber in java usinf org.eclipse.paho.client

My question is instead of pusblish String Message, can i publish image and pdf or txt file through mqtt? and is there any limited of which format to use when publish?

from 

peiyuan