Java Network Communication Programming and java Network Communication Programming

Java Network Communication Programming and java Network Communication Programming

Method 1: Synchronous blocking (BIO ):

Server ):

1 package com. ietree. basicskill. socket. mode1; 2 3 import java. io. IOException; 4 import java.net. serverSocket; 5 import java.net. socket; 6 7/** 8 * Server 9 */10 public class Server {11 // PORT number 12 final static int PORT = 8765; 13 public static void main (String [] args) {14 ServerSocket server = null; 15 try {16 server = new ServerSocket (PORT); 17 System. out. println ("Server start ...... "); 18 // block 19 Socket Socket = server. accept (); 20 // create a program to execute the client task 21 new Thread (new ServerHandler (socket )). start (); 22 23} catch (IOException e) {24 e. printStackTrace (); 25} finally {26 if (server! = Null) {27 try {28 server. close (); 29} catch (IOException e) {30 e. printStackTrace (); 31} 32} 33 server = null; 34} 35} 36}

Use multiple threads to process received requests (ServerHandler ):

1 package com. ietree. basicskill. socket. mode1; 2 3 import java. io. bufferedReader; 4 import java. io. IOException; 5 import java. io. inputStreamReader; 6 import java. io. printWriter; 7 import java.net. socket; 8 9 public class ServerHandler implements Runnable {10 private Socket socket; 11 public ServerHandler (Socket socket) {12 this. socket = socket; 13} 14 15 @ Override16 public void run () {17 BufferedReade R in = null; 18 PrintWriter out = null; 19 try {20 in = new BufferedReader (new InputStreamReader (this. socket. getInputStream (); 21 out = new PrintWriter (this. socket. getOutputStream (), true); 22 String body = null; 23 while (true) {24 body = in. readLine (); 25 if (body = null) {26 break; 27} 28 System. out. println ("Server:" + body); 29 out. println ("server-side response data. "); 30} 31} catch (Exception e) {32 e. printStackTrace (); 33} finally {34 if (in! = Null) {35 try {36 in. close (); 37} catch (IOException e) {38 e. printStackTrace (); 39} 40} 41 if (out! = Null) {42 try {43 out. close (); 44} catch (Exception e) {45 e. printStackTrace (); 46} 47} 48 if (socket! = Null) {49 try {50 socket. close (); 51} catch (IOException e) {52 e. printStackTrace (); 53} 54} 55 socket = null; 56} 57} 58}

Client ):

1 package com. ietree. basicskill. socket. mode1; 2 3 import java. io. bufferedReader; 4 import java. io. IOException; 5 import java. io. inputStreamReader; 6 import java. io. printWriter; 7 import java.net. socket; 8 9/** 10 * Client 11 */12 public class Client {13 final static String ADDRESS = "127.0.0.1"; 14 final static int PORT = 8765; 15 public static void main (String [] args) {16 Socket socket = null; 17 Buffere DReader in = null; 18 PrintWriter out = null; 19 try {20 socket = new Socket (ADDRESS, PORT); 21 in = new BufferedReader (new InputStreamReader (socket. getInputStream (); 22 out = new PrintWriter (socket. getOutputStream (), true); 23 24 // send data 25 out to the server. println ("request data received from the client ...... "); 26 String response = in. readLine (); 27 System. out. println ("Client:" + response); 28} catch (Exception e) {29 e. printStackTra Ce (); 30} finally {31 if (in! = Null) {32 try {33 in. close (); 34} catch (IOException e) {35 e. printStackTrace (); 36} 37} 38 if (out! = Null) {39 try {40 out. close (); 41} catch (Exception e) {42 e. printStackTrace (); 43} 44} 45 if (socket! = Null) {46 try {47 socket. close (); 48} catch (IOException e) {49 e. printStackTrace (); 50} 51} 52 socket = null; 53} 54} 55}

Program output:

Server:

Server start... Server: receives the request data from the client ......

Client:

Client: The data returned by the server.

Non-blocking synchronization (NIO)

 

 

Asynchronous non-blocking (AIO)