JavaTcp communication client and server instance code

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This paper gives an example of java Tcp communication between client and server. Share with you for your reference, the details are as follows:

Data is sent by the server

Server side:

Import java.io.*;import java.net.*;public class TestSocket {public static void main (String [] args) {try {ServerSocket ss = new ServerSocket (8888); while (true) {Socket s = ss.accept (); OutputStream os = s.getOutputStream (); DataOutputStream dos = new DataOutputStream (os); dos.writeUTF ("hello" + s.getInetAddress () + "port" + s.getPort () + "beybye"); dos.close (); / / os.flush (); os.close (); / / s.close () } catch (IOException e) {e.printStackTrace (); System.out.println ("there is a wrong");}

Client:

Import java.io.*;import java.net.*;public class TestClient {public static void main (String [] args) {try {Socket s = new Socket ("127.0.0.1", 8888); DataInputStream dis = new DataInputStream (s.getInputStream ()); System.out.println (dis.readUTF ()); s.close (); dis.close ();} catch (Exception e) {e.printStackTrace ();}

Both the client side and the server side can send and receive data.

Interactive type

Client end

Import java.io.*;import java.net.*;public class TestClient2 {public static void main (String [] args) {try {Socket s = new Socket ("127.0.0.1", 8886); DataOutputStream dos = new DataOutputStream (s.getOutputStream ()); DataInputStream dis = new DataInputStream (s.getInputStream ()); System.out.println (dis.readUTF ()); dos.writeUTF ("hey"); String str = null; if ((str = dis.readUTF ())! = null) {System.out.println (str) } s.close (); dis.close (); dos.close ();} catch (Exception e) {e.printStackTrace ();}

Server side:

Public class TestServer2 {public static void main (String [] args) {InputStream in = null; OutputStream out = null; try {ServerSocket ss = new ServerSocket (8886); while (true) {Socket s = ss.accept (); in = s.getInputStream (); out = s.getOutputStream (); DataOutputStream dos = new DataOutputStream (s.getOutputStream ()); DataInputStream dis = new DataInputStream (s.getInputStream ()); String str = null; if ((str = dis.readUTF ())! = null) {System.out.println (str) System.out.println ("form" + s.getInetAddress ()); System.out.println ("port" + s.getPort ()); / / dos.writeUTF ("hello" + s.getInetAddress () + "port" + s.getPort () + "beybye");} dos.writeUTF ("hi hello"); dis.close (); dos.close (); s.close ();}} catch (IOException e) {e.printStackTrace (); System.out.println ("there is a wrong");}

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