实验08-Java之网络编程.doc

实验八 网络编程1实验目的（1）掌握Socket通信。（2）掌握UDP通信2实验内容实验题1 利用Socket类和ServerSocket类编写一个C/S程序，实现C/S通信。客户端向服务器端发送Time命令，服务器端接受到该字符串后将服务器端当前时间返回给客户端；客户端向服务器端发送Exit命令，服务器端向客户端返回“Bye”后退出。package cn.e;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.DataInputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import .Socket;import .UnknownHostException;import java.util.Scanner;public class Client public static void main(String args) Socket client = null; InputStreamReader in = null;/将字节流变为字符流，有转换功能 OutputStreamWriter out = null; try client = new Socket(localhost,4331); catch (UnknownHostException e2) / TODO Auto-generated catch blocke2.printStackTrace(); catch (IOException e2) / TODO Auto-generated catch blocke2.printStackTrace(); try in = new InputStreamReader(client.getInputStream(); catch (IOException e1) / TODO Auto-generated catch blocke1.printStackTrace(); try out=new OutputStreamWriter(client.getOutputStream(); catch (IOException e1) / TODO Auto-generated catch blocke1.printStackTrace(); BufferedWriter bout=new BufferedWriter(out); BufferedReader bin=new BufferedReader(in); while(true)/从客户端向服务器传输数据 System.out .println(请输入Time或者Exit); Scanner reader=new Scanner(System.in); try bout.write(reader.next(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace(); try bout.newLine(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace(); try bout.flush(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace(); String massage = null; try massage=bin.readLine(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace(); if(massage.equals(Bye) System.out.println(Fromserver:+massage); break; else System.out.println(从服务器返回的时间：+massage); try client.close(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace(); package cn.e;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import .ServerSocket;import .Socket;import java.text.SimpleDateFormat;import java.util.Date;public class Server public static void main(String args) ServerSocket server = null;try server = new ServerSocket(4331); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();System.out.println(服务器启动完毕);System.out.println(等待客户端连接.);Socket you = null;try you = server.accept(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();InputStreamReader in = null;OutputStreamWriter out = null;try in = new InputStreamReader(you.getInputStream(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();try out = new OutputStreamWriter(you.getOutputStream(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();BufferedWriter bout = new BufferedWriter(out);BufferedReader bin = new BufferedReader(in);if (you.isConnected() System.out.println(客户端名称为 + you.getInetAddress().getHostAddress()+ 连接成功！);while (true) String s = null;try s = bin.readLine(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();if (s.equals(Time) Date date = new Date();System.out.println(客户端请求当前时间);SimpleDateFormat format = new SimpleDateFormat(yyyy/MM/ddHH:mm:ss); else if (s.equals(exit) try bout.write(bye!); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();try bout.newLine(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();try bout.flush(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();try you.close(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();基本要求 编写完整程序。实验题2 编写一数据报通信程序，实现简单的聊天功能。聊天内容输入文本确定清空退出图3.9 聊天程序界面基本要求 两人一组编写完整程序。“聊天内容”和“输入文本”分别为当前聊天的历史信息和当前要传送出去的聊天文本。“确定”、“清空”、“退出”三个按钮分别实现发送当前聊天文本、清空当前聊天文本和退出系统的功能。package cn.e;import java.awt.*;import java.awt.event.*;import java.io.IOException;import .*;import javax.swing.*;public class UDPmessage extends JFrame implements ActionListener private JTextArea text;private JTextField ipText;private JTextField sendText;private JButton button1;private JButton button2;private JButton button3;private DatagramSocket socket;private JScrollBar 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, BorderLayout.CENTER);JPanel panel = new JPanel();/一定要有的BorderLayout panelLayout = new BorderLayout();panelLayout.setHgap(5);panel.setLayout(panelLayout);ipText = new JTextField(03);panel.add(ipText, BorderLayout.WEST);sendText = new JTextField();panel.add(sendText, BorderLayout.CENTER);button1 = new JButton(确定);/button2 = new JButton(清空);/button3 = new JButton(退出);panel.add(button1, BorderLayout.EAST);add(panel, BorderLayout.SOUTH);setVisible(true); server();button1.addActionListener(this);private void server() try socket=new DatagramSocket(9527); catch (SocketException e) / TODO Auto-generated catch blocke.printStackTrace();/实例化数据报套接字byte buf=new byte1024;final DatagramPacket dpl=new DatagramPacket(buf,buf.length);/创建接收数据的数据包Runnable runnable=new Runnable()public void run()while(true)try Thread.sleep(100); catch (InterruptedException e) / TODO Auto-generated catch blocke.printStackTrace();try socket.receive(dpl); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();int length=dpl.getLength();String message=new String(dpl.getData(),0,length);/获取数据包的字符串信息String ip=dpl.getAddress().getHostAddress();try if(!InetAddress.getLocalHost().getHostAddress().equals(ip); catch (UnknownHostException e) / TODO Auto-generated catch blocke.printStackTrace();text.append(ip+:n+message+n);vsBar.setValue(vsBar.getMaximum();/控制信息滚动;public void actionPerformed(ActionEvent ev) String ip=ipText.getText();/获取IP文本框内容InetAddress address = null;try address = InetAddress.getByName(ip); 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