Use Apache Mina

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<> Description of the basic class of Mina in Apache Mina ioaccepter is equivalent to the ioconnector on the server side in the network application program. It is equivalent to the iosession on the client. A connection instance from the current client to the server, iohandler, business processing logic, iofilter, is used for communication interface with business layer server: minaserver. java Public class minaserver { Private Static final int server_port = 9990; Public static void main (string [] ARGs) throws throwable { // Server entry Ioacceptor acceptor = new socketacceptor (); Socketacceptorconfig CFG = new socketacceptorconfig (); Cfg. setreuseaddress (true ); // Set this filter to read data in units of Objects Cfg. getfilterchain (). addlast ("codec ", New protocolcodecfilter (New objectserializationcodecfactory ())); // Add a log Filter Cfg. getfilterchain (). addlast ("logger", new loggingfilter ()); // Receives the access connection and the iohandler trigger event Acceptor. BIND (New inetsocketaddress (server_port), new serverhandler (), CFG ); System. Out. println ("the server listening on port" + server_port ); } } Server-side service processing: Public class serverhandler extends iohandleradapter { /** * Triggered when a new connection exists. */ Public void sessionopened (iosession session ){ System. Out. println ("sessionopened "); } /** * Receive a message from the client */ Public void messagereceived (iosession session, object message ){ System. Out. println ("server messagereceived! "); Citymessage CM = (citymessage) message; System. Out. println (CM. getcode () + ":" + cm. getname ()); // Send messages to the client Session. Write (CM ); } /** * Triggered when an exception occurs. */ Public void exceptioncaught (iosession session, throwable cause ){ Session. Close (); } /** * Triggered when the connection is closed */ Public void sessionclosed (iosession SSN) throws exception { System. Out. println ("session closed from" + SSN. getremoteaddress ()); } } Message object to be sent: Public class citymessage implements serializable { Private int code; Private string name; Public int getcode (){ Return code; } Public void setcode (INT code ){ This. Code = code; } Public String getname (){ Return name; } Public void setname (string name ){ This. Name = Name; } } Client: Public class minaclient { Private Static final string hostname = "localhost "; Private Static final int Port = 9990; Public static void main (string [] ARGs) throws throwable { // Connector is the client Portal Socketconnector conne= new socketconnector (); Socketconnectorconfig CFG = new socketconnectorconfig (); // Set this filter to read data in units of Objects Cfg. getfilterchain (). addlast ("codec ", New protocolcodecfilter (New objectserializationcodecfactory ())); // Add a log Filter Cfg. getfilterchain (). addlast ("logger", new loggingfilter ()); // Initiate a connection to the remote server and trigger the event to iohandler Connector. Connect (New inetsocketaddress (hostname, port ), New clienthandler (), CFG ); } } Client Service Processing: Public class clienthandler extends iohandleradapter { Public clienthandler (){ Super (); } /** * Triggered when a new connection exists. */ Public void sessionopened (iosession session ){ // Create a citymessage for sending Citymessage CM = new citymessage (); Cm. setcode (547600 ); Cm. setname ("fengshan "); Session. Write (CM ); } /** * Receive a message from the client */ Public void messagereceived (iosession session, object message ){ System. Out. println ("client messagereceived! "); Citymessage CM = (citymessage) message; System. Out. println (CM. getcode () + ":" + cm. getname ()); } /** * Triggered when an exception occurs. */ Public void exceptioncaught (iosession session, throwable cause ){ Session. Close (); } /** * Triggered when the connection is closed */ Public void sessionclosed (iosession SSN) throws exception { System. Out. println ("session closed from" + SSN. getremoteaddress ()); } } To develop a mina application, simply put, create links, set filter rules, and write your own message processor! Filter: objectserializationcodecfactory: sets this filter to read data in units of objects. Textlinecodecfactory: sets this filter to read data from one row (/R/n). Note: (Excerpted from the internet) the socket established by Apache Mina is TCP or UDP, when the filter does not add the codec option, the message object in the public void messagereceived (iosession session, object message) {} function of the handler class derived from iohandleradapter is an iobuffer instance, as follows: @ override Public void messagereceived (iosession session, object message) Throws exception { If (! (Message instanceof iobuffer )){ Return; } Iobuffer RB = (iobuffer) message; Callback. messagereceived (Java. NiO. bytebuffer. Wrap (RB. Array (), 0, RB. Buf (). Limit ())); } If you use Mina to create a socket, add the following: Iofilter codec_filter = new protocolcodecfilter ( New textlinecodecfactory ()); Connector (acceptor). getfilterchain (). addlast ("codec", codec_filter ); If the socket for sending data is not set the same or is not a socket created using Mina, you need to add '/N' at the end of the data to send the data to indicate that the string ends. This article from the "Qingshan" blog, please be sure to keep this source http://java999.blog.51cto.com/259217/148287