實驗八-網(wǎng)絡編程基礎

1、實驗八 網(wǎng)絡編程基礎1實驗目的（1）掌握Socket通信。（2）掌握UDP通信2實驗內容實驗題1 使用InetAddress類的方法獲取/的主機的IP地址；獲取本地機的名稱和IP地址。具體代碼如下：package demo;import .InetAddress ;public class InetAddressDemo public static void main(String args)throws Exception InetAddress locAdd = null ;locAdd = InetAddress.getLoc

2、alHost() ;/ 得到本機System.out.println(本機的IP地址： + locAdd.getHostAddress() ;System.out.println(本機的名稱+locAdd.getHostName();運行結果如下：實驗題2 使用URL類下載西北農林科技大學首頁/，并統(tǒng)計下載得到網(wǎng)頁文件的大小。具體代碼如下：package demo;import .URL ;import .URLConnection ;import java.io.InputStream ;import java.u

3、til.Scanner ;public class URLConnectionDemo public static void main(String args) throws ExceptionURL url = new URL() ;URLConnection urlCon = url.openConnection() ;/ 建立連接InputStream input = url.openStream() ;Scanner scan = new Scanner(input) ;scan.useDelimiter(n) ;while(scan.ha

4、sNext()System.out.println(scan.next() ;System.out.println(內容大小： + urlCon.getContentLength() ;實驗題3 利用Socket類和ServerSocket類編寫一個C/S程序，實現(xiàn)C/S通信。客戶端向服務器端發(fā)送Time命令，服務器端接受到該字符串后將服務器端當前時間返回給客戶端；客戶端向服務器端發(fā)送Exit命令，服務器端向客戶端返回“Bye”后退出?；疽?編寫完整程序；兩人一組，一個作為服務器端，另一人作為客戶端。服務器端和客戶端都需要打印出接受到的消息和發(fā)出的命令。具體的程序代碼如下：package

5、demo;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import .ServerSocket;import .Socket;import java.util.Calendar;public class server public static void main(String args) try ServerSocket server = new ServerSocket(

6、9527);System.out.println(服務器啟動完畢);Socket socket = server.accept();System.out.println(創(chuàng)建客戶連接);InputStream input = socket.getInputStream();InputStreamReader isreader = new InputStreamReader(input);BufferedReader reader = new BufferedReader(isreader);while (true) String str = reader.readLine();if (str.

7、equals(exit) System.out.println(Bye);break;if (str.equals(Time) String s = Calendar.getInstance().getTime().toString();System.out.println(服務器當前的時間為: + s);reader.close();isreader.close();input.close();socket.close();server.close(); catch (IOException e) e.printStackTrace();package demo;import java.io

8、.IOException;import java.io.OutputStream;import .UnknownHostException;import .Socket;public class Client public static void main(String args) try Socket socket = new Socket(localhost, 9527);OutputStream out = socket.getOutputStream();out.write(Timen.getBytes();out.write(exitn.getByte

9、s(); catch (UnknownHostException e) e.printStackTrace(); catch (IOException e) e.printStackTrace();運行結果如下：實驗題4 編寫一數(shù)據(jù)報通信程序，實現(xiàn)簡單的聊天功能。聊天內容輸入文本確定清空退出圖3.14 聊天程序界面基本要求 兩人一組編寫完整程序?！傲奶靸热荨焙汀拜斎胛谋尽狈謩e為當前聊天的歷史信息和當前要傳送出去的聊天文本。“確定”、“清空”、“退出”三個按鈕分別實現(xiàn)發(fā)送當前聊天文本、清空當前聊天文本和退出系統(tǒng)的功能。具體代碼如下：package ChattingP;import java.aw

10、t.*;import java.awt.event.*;import java.io.IOException;import .*;import javax.swing.*;public class UDPmessage extends JFrame implements ActionListenerprivate JTextArea text;private JTextField ipText;private JTextField sendText;private JButton button;private DatagramSocket socket;private JScr

11、ollBar vsBar;public UDPmessage()setTitle(UDP聊天程序);setBounds(100,100,400,300);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setLayout(new BorderLayout();text = new JTextArea();text.setEditable(false);JScrollPane textPanel = new JScrollPane(text);vsBar = textPanel.getVerticalScrollBar();add(textPanel

12、,BorderLayout.CENTER);JPanel panel = new JPanel();BorderLayout panelLayout = new BorderLayout();panelLayout.setHgap(5);panel.setLayout(panelLayout);ipText = new JTextField(120.95.160.);panel.add(ipText,BorderLayout.WEST);sendText = new JTextField();panel.add(sendText,BorderLayout.CENTER);button = ne

13、w JButton(發(fā)送);panel.add(button,BorderLayout.EAST);add(panel,BorderLayout.SOUTH);setVisible(true);server();button.addActionListener(this);private void server()try socket = new DatagramSocket(9527);byte buf = new byte1024;final DatagramPacket dpl = new DatagramPacket(buf,buf.length);Runnable runnable

14、= new Runnable()public void run()while(true)tryThread.sleep(100);socket.receive(dpl);int length = dpl.getLength();String message = new String(dpl.getData(),0,length);String ip = dpl.getAddress().getHostAddress();if(!InetAddress.getLocalHost().getHostAddress().equals(ip)text.append(ip+:n +message+n);

15、vsBar.setValue(vsBar.getMaximum(); catch(IOException e)e.printStackTrace(); catch(InterruptedException e)e.printStackTrace();new Thread(runnable).start(); catch (SocketException e) e.printStackTrace();public void actionPerformed(ActionEvent ev)try String ip = ipText.getText();InetAddress address = I

16、netAddress.getByName(ip);byte data = sendText.getText().getBytes();DatagramPacket dp = new DatagramPacket(data, data.length,address,9527);String myip = InetAddress.getLocalHost().getHostAddress();text.append(myip+:n +sendText.getText()+n);socket.send(dp);sendText.setText(null); catch (UnknownHostExc

17、eption e) / TODO Auto-generated catch blocke.printStackTrace();catch(IOException e)e.printStackTrace();public static void main(String args) JFrame frame = new UDPmessage();運行結果如下：實驗題5 客戶機之間通過服務器交換數(shù)據(jù)。 提示：為了適應傳輸各種類型的數(shù)據(jù)，必須統(tǒng)一客戶機的數(shù)據(jù)格式，為此可以將數(shù)據(jù)封裝在一個對象中，數(shù)據(jù)傳輸以對象的形式傳輸。因此必須定義一個數(shù)據(jù)封裝的類，此類實現(xiàn)Serializable接口。實驗代碼:pa

18、ckage cie.bing;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;public class Feng implements Serializable S

19、tring name;String password;int age;Overridepublic String toString() / TODO Auto-generated method stubreturn name+n+password+n+age;public Feng(String name,String password,int age)=name;this.password=password;this.age=age;public void setpassword(String password)this.password=password;public static void main(String args) throws IOException / TODO Auto-generated method stubFeng user=new Feng(li,3123,23