Đề Lập trình mạng

Xây dựng chương trình hội thoại chat room Client/Server hoạt động theo giao thức TCP/IP 3.1.Chương trình: //Server package Bai3; import java.io.DataInputStream; import java.io.DataOutput

3 Xây dựng chương trình hội thoại chat room Client/Server hoạt động theo giao thức TCP/IP

3.1.Chương trình:

//Server

package Bai3;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.ServerSocket;

import java.net.Socket;

import java.util.Vector;

public class Server {

public final static int daytimePort = 5000;

public Vector<ThreadedHandler> cls=new Vector<ThreadedHandler>();

public Server(){

ServerSocket theServer;

Socket theConnection;

try {

theServer = new ServerSocket(daytimePort);

while (true) {

theConnection = theServer.accept();

System.out.println("Have Connection!");

new ThreadedHandler(this,theConnection).start();

} }catch (IOException e) { System.err.println(e); }}

public static void main(String[] args) {new Server(); }

public class ThreadedHandler extends Thread{

Server sv;

public Socket incoming;

public DataInputStream dis;

public DataOutputStream dos;

public String name;

public ThreadedHandler(ChatRoomServer sv, Socket i) {

this.sv=sv;

this.incoming=i;

try{

this.dis = new DataInputStream(incoming.getInputStream()); this.dos = new DataOutputStream(incoming.getOutputStream()); }catch(IOException e){}}

public void run(){

String ch="";

try{

ch = dis.readUTF();

String cmd=ch.substring(0, ch.indexOf(","));

String msg=ch.substring(ch.indexOf(",")+1);

if (!cmd.equals("Joint")) incoming.close();

System.out.println("Hello "+msg);

this.name=msg;

this.sv.cls.add(this);

while (true) {

ch = dis.readUTF();

cmd=ch.substring(0, ch.indexOf(","));

msg=ch.substring(ch.indexOf(",")+1);

if (cmd.equals("Msg")) {

for (int i=0;i<this.sv.cls.size();i++){

ThreadedHandler temp=this.sv.cls.get(i);

if (temp!=this){

temp.dos.writeUTF("Msg,"+this.name+">>"+msg);}}}

else{ incoming.close();

this.sv.cls.remove(this);}} }catch(IOException e) {sv.cls.remove(this);}}}}

//Client ChatRoom

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.*;

public class Client {

public JFrame frame;

public JTextArea Room;

public JTextField msg;

public JTextArea Joiners;

public String NickName;

public Socket soc;

public DataInputStream dis;

public DataOutputStream dos;

public Client(String NickName){

this.NickName = NickName;

this.frame = new JFrame("Chat Room!");

this.frame.setSize(480 ,400);

this.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.frame.setLayout(null);

JLabel lr=new JLabel("Chat room! Hello "+this.NickName); lr.setBounds(20, 10, 300, 25);

this.frame.add(lr);

this.Room=new JTextArea("");

this.Room.setBounds(20, 50, 300, 250);

this.Room.setEditable(false);

this.frame.add(Room);

JLabel lsd=new JLabel("Send");

lsd.setBounds(20, 325, 50, 25);

this.frame.add(lsd);

this.msg=new JTextField("");

this.msg.setBounds(100, 325, 200, 25);

msg.addActionListener(new SendActionListener(this));

this.frame.add(msg);

JButton OK=new JButton("Send");

OK.setBounds(320, 325, 80, 25);

OK.addActionListener(new SendActionListener(this));

this.frame.add(OK);

JLabel lj=new JLabel("Joiners");

lj.setBounds(620, 10, 50, 50);

this.frame.add(lj);

this.Joiners = new JTextArea("");

this.Joiners.setBounds(330, 50, 120, 250);

this.Joiners.setEditable(false);

this.frame.add(Joiners);

frame.setVisible(true);

try{

soc = new Socket("localhost", 5000);

this.dis = new DataInputStream(soc.getInputStream());

this.dos = new DataOutputStream(soc.getOutputStream());

new ThreadedHandler(this).start();

this.dos.writeUTF("Joint,"+this.NickName);

}catch(IOException e){this.frame.dispose();}

}

public class SendActionListener implements ActionListener{

Client cr;

public SendActionListener(Client cr){

this.cr = cr; } public void actionPerformed(ActionEvent e) {

if (!cr.msg.getText().equals("")){

cr.Room.setText(cr.NickName+"> "+cr.msg.getText() +"\n"+cr.Room.getText());

try{ this.cr.dos.writeUTF("Msg,"+cr.msg.getText());

}catch(IOException e1){cr.frame.dispose();new LoginFrame("");} cr.msg.setText("");}}}

public class ThreadedHandler extends Thread{

Client cr;

public ThreadedHandler(ChatRoom cr){

this.cr=cr; } public void run(){

String ch="";

try{

while (true){

ch = dis.readUTF();

String cmd=ch.substring(0, ch.indexOf(","));

String msg=ch.substring(ch.indexOf(",")+1);

if (cmd.equals("Msg"))

this.cr.Room.setText(msg+"\n"+cr.Room.getText()); else this.cr.soc.close();}

}catch(IOException e){cr.frame.dispose();new LoginFrame("");}}}} //Xuly ChatRoom

public class LoginFrame {

public JFrame frame;

public LoginFrame(String ms){

frame = new JFrame("Login");

frame.setSize(400 ,300);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setLayout(null);

JLabel lname=new JLabel("Name");

lname.setBounds(50, 50, 50, 50);

frame.add(lname);

final JTextField Name=new JTextField("");

Name.setBounds(120, 50, 200, 50);

frame.add(Name);

final JLabel msg=new JLabel("Msg:"+ms);

msg.setBounds(120, 200, 200, 50);

frame.add(msg);

JButton OK=new JButton("Login");

OK.setBounds(120, 120, 200, 50);

OK.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent arg0) {

if (!Name.getText().equals("")){

new Client(Name.getText());

frame.dispose();}

else msg.setText("Msg: Please input your name!"); }});

frame.add(OK); frame.setVisible(true);}

public static void main(String[] args){new LoginFrame("");}}

1 Xây dựng chương trình hội thoại Client/Server hoạt động theo giao thức UDP

+ Đổi chuỗi đã gửi thành chuỗi in hoa + Đổi chuỗi đã gửi thành chuỗi thường + Đếm số từ của chuỗi đã gửi

1.1.Chương trình:

//Server

package Bai1;

import java.io.IOException;

import java.net.*;

public class UDPServer {

public static void main(String[] args) throws IOException {

DatagramSocket socket = new DatagramSocket(5000);

byte [] send;

byte [] receive = new byte[1024];

System.out.println("server is ready");

while(true) {

Xuly xuly = new Xuly();

DatagramPacket receivePac = new DatagramPacket(receive, receive.length); socket.receive(receivePac);

String chuoi = new String(receivePac.getData()).substring(0,receivePac.getLength());

System.out.println("Chuoi nhan duoc tu Client: "+chuoi);

String Hoa = xuly.Hoa(chuoi);

String Thuong = xuly.Thuong(chuoi);

String sotu = xuly.DemSoTu(chuoi)+"";

send = (Hoa+Thuong+sotu).getBytes();

int Port = receivePac.getPort();

InetAddress IP = receivePac.getAddress();

DatagramPacket sendPac = new DatagramPacket(send,send.length,IP,Port); socket.send(sendPac);}}}

//Client

import java.util.Scanner;

public class Client {

public static void main(String[] args) throws IOException {

Scanner nhap = new Scanner(System.in);

DatagramSocket socket = new DatagramSocket();

byte [] send;

byte [] receive = new byte[1024];

InetAddress IP = InetAddress.getByName("localhost");

int Port = 5000;

while(true) {

System.out.print("Nhap chuoi can xu ly: ");

String chuoi = nhap.nextLine();

chuoi = chuoi.trim();

int l = chuoi.length();

send = chuoi.getBytes();

DatagramPacket sendPac = new DatagramPacket(send, send.length,IP,Port); socket.send(sendPac);

DatagramPacket receivePac = new DatagramPacket(receive, receive.length); socket.receive(receivePac);

String ketqua=new String(receivePac.getData()).substring(0,receivePac.getLength());

String Hoa = ketqua.substring(0,l);

String Thuong = ketqua.substring(l,2*l);

String SoTu = ketqua.substring(3*l,ketqua.length());

System.out.println("In ra chuoi Hoa: "+Hoa);

System.out.println("In ra chuoi Thuong: "+Thuong);

System.out.println("So tu cua chuoi: "+SoTu);}}}

//Xuly

public class Xuly {

public String Hoa(String s)

{

s=s.trim();

String tam="";

for(int i=0;i<s.length();i++) {

char c=s.charAt(i);

if(c>='a' && c<'z' ) c = (char) (c-32);

tam+=c; } return tam; } public String Thuong(String s)

{

s=s.trim();

String tam="";

for(int i=0;i<s.length();i++) {

char c=s.charAt(i);

if(c>='A' && c<='Z') c=(char)(c+32);

tam+=c;

} return tam; } public int DemSoTu(String s)

{

int count =0;

try{

for(int i=0;i<s.length();i++) {

if(s.charAt(i)==' ' && s.charAt(i+1)!=' ' && s.charAt(i+1)!='\0') {count++;}}

if(s.charAt(0)!=' ') count++;

return count;

}catch(Exception e){ return count; }}

public static void main(String[] args) {

Xuly xuly = new Xuly();

System.out.println(xuly.DemSoTu("Truong Phi")); }}

2 Xây dựng chương trình hội thoại Client/Server hoạt động theo giao thức UDP

- Chương trình Client cho phép nhập vào từ bàn phím một chuỗi biễu diễn một phép tính gồm các toán tử +, -, (, )

- Chương trình Server thực hiện tính toán và trả kết quả về cho Client

2.1.Chương trình

//Server

import java.io.IOException;

import java.net.*;

import java.util.Scanner;

public class Server {

public static void main(String[] args) throws IOException {

DatagramSocket socket = new DatagramSocket(5000);

byte [] receive = new byte[1024];

byte [] send ; System.out.println("server is ready");

while(true) {

DatagramPacket receivePac = new DatagramPacket(receive, receive.length); socket.receive(receivePac);

String chuoi = new String(receivePac.getData()).substring(0,receivePac.getLength());

System.out.println("Chuoi nhan duoc tu client: "+chuoi);

//gui di XuLy xuly = new XuLy();

send = xuly.calculate(chuoi).getBytes();

int Port = receivePac.getPort();

InetAddress IP = receivePac.getAddress();

DatagramPacket sendPac = new DatagramPacket(send, send.length,IP,Port); socket.send(sendPac);}}}

//Client

public class Client {

public static void main(String[] args) throws IOException {

Scanner nhap = new Scanner(System.in);

DatagramSocket socket = new DatagramSocket();

int Port = 5000;

InetAddress IP = InetAddress.getByName("localhost");

byte [] receive = new byte[1024];

byte [] send ; while(true) {

System.out.print("Nhap chuoi can xu ly: ");

String chuoi = nhap.nextLine();

//gui chuoi can xu ly cho server send = chuoi.getBytes();

DatagramPacket sendPac = new DatagramPacket(send, send.length,IP,Port); socket.send(sendPac);

//nhan xu ly tu phia server DatagramPacket receivePac = new DatagramPacket(receive, receive.length); socket.receive(receivePac);

String ketqua = new String(receivePac.getData()).substring(0,receivePac.getLength());

System.out.println("Ket qua: "+ketqua);}}}

//Xuly

import java.util.Stack;

public class XuLy {

private int Priority(char c) {

if (c == '+' || c == '-') return 1;

if (c == '*' || c == '/') return 2;

if (c == '^' || c == '#') return 3;

return 0;

}

private boolean IsNumber(char c) {

return (c >= '0' && c <= '9') || (c == '.');}

private String convert(String st) {

// dau # quy uoc cho sqrt

st = st.replaceAll("sqrt", "#");

System.out.println(st);

String result = "";

Stack<Character> stack = new Stack<Character>();

try {

for (int i = 0; i < st.length(); i++) {

System.out.println("result " + result);

//neu la phep toan

if (st.charAt(i) == '+' || st.charAt(i) == '-'

|| st.charAt(i) == '/' || st.charAt(i) == '*'

|| st.charAt(i) == '^' || st.charAt(i) == '#') {

if (stack.size() > 0) {

try {

while (Priority(stack.peek()) >= Priority(st

.charAt(i))) { result += stack.pop(); } } catch (Exception e) {}}

stack.push(st.charAt(i)); }

//neu la so

if (st.charAt(i) >= '0' && st.charAt(i) <= '9') {

int pos = i;

//liem tra cac vi tri tiep theo co phai so hay khong while (IsNumber(st.charAt(i))) {

i++;

if (i == st.length())

break;}

result += st.substring(pos, i) + " ";

i ;//vi lat nua quay tro lai vong lap for chinh i se tang len }

// push dau (

if (st.charAt(i) == '(' )

stack.push( '(' );

// gap dau ) se dua cac phep toan trong stack ra

if (st.charAt(i) == ')') {

char tmp = stack.pop();

while (tmp != '(') {

result += tmp;

tmp = stack.pop(); }}}

while (!stack.empty())

result += stack.pop();

} catch (Exception e) {

return "Error"; } System.out.println("resultt o day la:"+result);

return result;}

public String calculate(String st) {

int S = 0;

String bl = convert(st).trim();

if (bl.compareTo("Error") == 0) return "Error";

bl += " ";

Stack<Float> stack = new Stack<Float>();

float a, b;

try {

for (int i = 0; i < bl.length(); i++) {

System.out.println("kt: " + bl + " " + i);

switch (bl.charAt(i)) { case '*':

a = stack.pop();

b = stack.pop();

stack.push(a * b); break;

case '/':

a = stack.pop();

b = stack.pop();

if (a == 0) return "Error";

stack.push(b / a);break;

case '-':

a = stack.pop();

b = stack.pop();

stack.push(b - a);break;

case '+':

a = stack.pop();

b = stack.pop();

stack.push(a + b); break;

default: {

if (IsNumber(bl.charAt(i))) {

int pos = i;

i = bl.indexOf(" ", pos);

stack.push(Float.parseFloat(bl.substring(pos, i))); } else if (bl.charAt(i) != ' ') {

return "Error";

} } }}} catch (Exception e) { return "Error"; }

if (stack.size() > 1) return "Error";

return stack.pop() + "";}}

3 Xây dựng chương trình hội thoại chat room Client/Server hoạt động theo giao thức UDP

3.1.Chương trình :

//Server

package Bai3;

import java.io.IOException;

import java.net.DatagramPacket;

import java.net.DatagramSocket;

import java.net.InetAddress;

import java.net.Socket;

import java.util.Vector;

public class Server {

DatagramSocket soc;

byte[] receiveData = new byte[1024];

DatagramPacket pac;

public Vector<InetAddress> IP=new Vector<InetAddress>();

public Vector<Integer> port = new Vector<Integer>();

public static void main(String[]args){

new Server();

}

public Server(){

try {

soc = new DatagramSocket(5000);

Socket cl;

pac = new DatagramPacket(receiveData, receiveData.length);

while (true){

soc.receive(pac);

String st = new String(pac.getData()).substring(0, pac.getLength()); try{

if (st.charAt(0)=='$' && st.charAt(1)=='$'){

IP.add(pac.getAddress());

port.add(pac.getPort());

System.out.println(""+IP.size()); continue;

} }catch(Exception e){}

for (int i=0; i<IP.size();i++)

send(st,IP.get(i),port.get(i)); }} catch (IOException e) {} } public void send(String st, InetAddress IPAddress,int port) throws IOException{

byte[] sendData = st.getBytes();

DatagramPacket sendpac = new DatagramPacket(sendData,sendData.length,IPAddress,port);

soc.send(sendpac);}}

//Client

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.net.UnknownHostException;

import javax.swing.*;

public class Client extends JFrame implements ActionListener{

int port=5000;

public JFrame frame;

public JTextArea Room;

public JTextField msg;

public JTextArea Joiners;

DatagramSocket soc;

DatagramPacket pac;

byte[] receiveData = new byte[1024];

InetAddress IPAddress;

String Username="";

public ChatClient(String Username){

this.Username = Username;

Send();

try {

soc = new DatagramSocket();

pac = new DatagramPacket(receiveData, receiveData.length);

IPAddress = InetAddress.getByName("localhost");

send("$$"+Username);

} catch (IOException e) {

e.printStackTrace();

} Thread th = new Thread(){

public void run(){