Java Learning Note (60)-Network Programming Login Instance

Client

 import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.net.Socket; import java.net.UnknownHostException;/ * * Client * * Public  class loginclient {     Public Static voidMain (string[] args) {Try{//1. Create a client socket, specify the server address and port number, and establish a connectionSocket socket=NewSocket ("localhost",8888);//2. Getting the output stream, sending information to the serverOutputStream Os=socket.getoutputstream ();//printwriter pw=new printwriter (OS);//package as print streamObjectOutputStream oos=NewObjectOutputStream (OS); User user=NewUser ("Admin","123"); Oos.writeobject (user);//Serialized ObjectSocket.shutdownoutput ();//close current output stream            //3. Get the input stream and read the server-side response informationInputStream is=socket.getinputstream (); BufferedReader br=NewBufferedReader (NewInputStreamReader ( is)); String Reply=br.readline (); while(reply!=NULL) {System.out.println ("I'm the client," said the server .+reply);            Reply=br.readline (); } socket.shutdowninput ();//4. Closing ResourcesBr.close (); is. Close ();            Oos.close ();            Os.close ();        Socket.close (); }Catch(Unknownhostexception e)        {E.printstacktrace (); }Catch(IOException e)        {E.printstacktrace (); }    }}

Title

 import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.net.ServerSocket; import java.net.Socket;/ * * Server side * / Public  class loginserver {     Public Static voidMain (string[] args) {Try{ServerSocket serversocket=NewServerSocket (8888); System.out.println ("****** server is about to start, waiting for client connections"); int count=0;//Statistics Client number            //Loop monitoring waits for client's connection             while(true) {Socket socket=serversocket.accept ();//Create a new threadServerthread thread=NewServerthread (socket); Thread.Start ();//Start threadcount++; System.out.println ("Number of clients:"+count); System.out.println ("Client IP:"+socket.getinetaddress (). gethostaddress ()); }        }Catch(IOException e)        {E.printstacktrace (); }     }}

Server thread Processing class

ImportJava.io.IOException;ImportJava.io.InputStream;ImportJava.io.ObjectInputStream;ImportJava.io.OutputStream;ImportJava.io.PrintWriter;ImportJava.net.Socket;/ * * Server thread processing class */ Public  class serverthread extends Thread {    //socket associated with this threadSocket socket=NULL; Public Serverthread(Socket socket) { This. Socket=socket; }//actions performed by thread    @Override     Public void Run() {InputStream is=NULL; ObjectInputStream ois=NULL; OutputStream os=NULL; PrintWriter pw=NULL;Try{Is=socket.getinputstream ();//byte streamois=NewObjectInputStream (IS);            User user= (user) ois.readobject (); System.out.println ("User name:"+user.getusername ()); System.out.println ("Password:"+user.getpassword ()); Socket.shutdowninput ();//close current input streamOs=socket.getoutputstream (); pw=NewPrintWriter (OS); Pw.println ("Welcome you!" ");            Pw.flush ();        Socket.shutdownoutput (); }Catch(IOException e)        {E.printstacktrace (); }Catch(ClassNotFoundException e)        {E.printstacktrace (); }finally{Try{if(pw!=NULL) Pw.close ();if(os!=NULL) Os.close ();if(ois!=NULL) Ois.close ();if(is!=NULL) Is.close ();            Socket.close (); }Catch(IOException e)            {E.printstacktrace (); }        }    }}

Title

Importjava.io.Serializable;/ * * Entity class User * / Public  class User implements Serializable {    Private Static Final LongSerialversionuid =6682618522883563864LPrivate intIdPrivateString username;PrivateString password; Public User() {Super(); } Public User(string username, string password) {Super(); This. Username = Username; This. Password = password; } Public int getId() {returnId } Public void setId(intID) { This. id = ID; } PublicStringGetUserName() {returnUsername } Public void Setusername(String username) { This. Username = Username; } PublicStringGetPassword() {returnPassword } Public void SetPassword(String password) { This. Password = password; } Public Static Long Getserialversionuid() {returnSerialversionuid; }}

Java Learning Note (60)-Network Programming Login Instance