(? What is Mina? Take the exam and go to mina.apache Org/Have a look, In a word, "a simple and easy to use Java structure based on Tcp/IP communication "What? What is the structure? Don't look down if you ask again.? What is Mina capable of? First pull it out and slip it out: we use it to make two small programs, one for the server, and after receiving the message from the client, we send it back to the client; the other is a simple client. Once the server is connected, we send a message to sign in, and then send the message received from the server to the server. Hmm, do you realize that this is an endless cycle of C/S communication, Programming is the first thing to do
Getting Started with Apache Mina (Final). pdf)