实验5-socket网络编程

深 圳 大 学 实 验 报 告 课程名称： 计算机网络 实验项目名称： Socket网络编程 学院：计算机与软件学院 专业： 物联网工程 指导教师： 崔来中 报告人：陈秋明 学号：2014150320 班级： 实验时间： 2016.04.20 实验报告提交时间： 2016.04.29 教务处制实验目的学习网络编程基本概念、InetAddress的应用、URL的应用、URLConnection的应用 。掌握Socket的TCP通信、 Socket的UDP通信掌握通过TCP实现网络文件传输的方法，掌握TCP连接是基于字符流实验环境使用Windows操作系统；Internet连接Eclipse+Java开发环境实验内容：5-1使用InetAddress类的方法获取本地机的名称和IP地址。使用InetAddress类的方法获取网站的IP地址，如果存在多个IP地址，要求全部返回。使用URL类下载深圳大学首页，并统计下载得到网页文件的大小5-2利用Socket类和ServerSocket类，编写一个C/S程序，实现聊天功能。5-3利用Socket类和ServerSocket类，编写一个C/S程序，实现网络文件传输。实验步骤：（用文字描述实验过程，可用截图辅助说明）5-1(1) 使用InetAddress类的方法获取本地机的名称和IP地址。package socket;import .*;public class one public static void main(String args)tryInetAddress add=InetAddress.getLocalHost();System.out.println(add);catch(UnknownHostException e)System.out.println(error);(2) 使用InetAddress类的方法获取网站的IP地址，如果存在多个IP地址，要求全部返回。 package socket;import .*;public class one public static void main(String args)tryInetAddress add=InetAddress.getByName();System.out.println(add);catch(UnknownHostException e)System.out.println(error);(3)使用URL类下载深圳大学首页，并统计下载得到网页文件的大小package socket;import .*;import java.io.*;public class onepublic static void main(String aregs )throws ExceptionURL url=new URL();URLConnection uc=url.openConnection(); int size=uc.getContentLength();InputStream in=url.openStream();FileOutputStream fout=new FileOutputStream(new File(qwe.html);int a=0;while(a-1)a=in.read();fout.write(a);fout.close();System.out.println(文件大小:+size+B); 5-2(1) 编写完整程序；一个服务器端程序，一个客户端程序。服务器端和客户端都需要打印出接受到的消息和发出的命令客户端package udp;import .*;import java.io.*;public class Client public static void main(String args)String s=null;String t=time;String q=exit;Socket mysocket;DataInputStream in=null;DataOutputStream out=null;trymysocket=new Socket(localhost,4331);in=new DataInputStream(mysocket.getInputStream();out=new DataOutputStream(mysocket.getOutputStream();System.out.println(服务器启动完毕);System.out.println(创建客户连接); out.writeBytes(t);s=in.readUTF();System.out.println(s);Thread.sleep(500);out.writeBytes(q);s=in.readUTF();System.out.println(s);Thread.sleep(500);catch(IOException e)System.out.println(无法连接);catch(InterruptedException e)服务端package udp;import .*;import java.io.*;import java.util.*;import java.text.*;public class SS public static void main(String args)ServerSocket s=null;Socket fuck=null;DataInputStream in=null;DataOutputStream out=null;System.out.println(服务器启动完毕);trys=new ServerSocket(4331);catch(IOException e)System.out.println(error+e);System.out.println(创建客户连接);tryfuck=s.accept();in=new DataInputStream(fuck.getInputStream();out=new DataOutputStream(fuck.getOutputStream();String ddate=new SimpleDateFormat(yyyy-MM-dd HH:mm:ss).format(Calendar.getInstance().getTime();out.writeUTF(服务器当前时间为：+ddate);Thread.sleep(500);String g=Bye;out.writeUTF(g);catch(IOException e)System.out.println(无法连接);catch(InterruptedException e)()(2) 聊天室package socket;import java.awt.*;import java.awt.event.*;import javax.swing.*;import .*;import java.io.*;import java.util.*;public class Chatroom extends JFrame implements ActionListener, Runnable,KeyListenerImage Image;private TextArea ta;private JTextField ip;private JTextField port;private JButton ss_server;private JButton ss_client;private JTextField send_text;private JTextField name;private JButton ss_send;private JButton ss_exit;private JButton ss_clear;private Socket skt; public void keyReleased(KeyEvent f) public void keyPressed(KeyEvent f) if(f.getKeyCode()= KeyEvent.VK_ENTER) tryPrintWriter pw = new PrintWriter(skt.getOutputStream();String s1=name.getText();String s = send_text.getText();if(s=null) return;Calendar ca= new GregorianCalendar(); int hh = ca.get(Calendar.HOUR_OF_DAY); int mm = ca.get(Calendar.MINUTE); int ss = ca.get(Calendar.SECOND); String time = new String(hh + : + mm + : + ss + ); ta.append(time+s1+说:+n+s+n); String s3=time+s1+说:+n+s;pw.println(s3);pw.flush();send_text.setText();catch(Exception e)ta.append(发送失败！n);public void keyTyped(KeyEvent f)public void run()tryBufferedReader br = new BufferedReader(new InputStreamReader(skt.getInputStream();while(true)String s = br.readLine();if(s=null) break;ta.append(s + n);catch(Exception e)e.printStackTrace();public void actionPerformed(ActionEvent e)if(e.getSource()=ss_server)doServer();if(e.getSource()=ss_client)doClient();if(e.getSource()=ss_send)doSend();if(e.getSource()=ss_exit)doexit();if(e.getSource()=ss_clear)doclear();public void doServer()tryServerSocket server = new ServerSocket(Integer.parseInt(port.getText();skt = server.accept();ta.append(连接服务器成功！n);new Thread(this).start();catch(Exception e)ta.append(服务器启动失败！n);public void doClient()tryskt = new Socket(ip.getText(), Integer.parseInt(port.getText();ta.append(连接服务器成功！n);new Thread(this).start();catch(Exception e)ta.append(连接失败！n);public void doSend()tryPrintWriter pw = new PrintWriter(skt.getOutputStream();String s1=name.getText();String s = send_text.getText();if(s=null) return;Calendar ca= new GregorianCalendar(); int hh = ca.get(Calendar.HOUR_OF_DAY); int mm = ca.get(Calendar.MINUTE); int ss = ca.get(Calendar.SECOND); String time = new String(hh + : + mm + : + ss + ); ta.append(time+s1+说:+n+s+n); String s3=time+s1+说:+n+s;pw.println(s3);pw.flush();send_text.setText();catch(Exception e)ta.append(发送失败！n);public void doclear()ta.setText();public void doexit()System.exit(0);public Chatroom()Panel a1 = new Panel(); Panel a2 = new Panel(); Panel a3 = new Panel();this.setTitle(聊天室);this.setBounds(200,200,600,500);Container cc = this.getContentPane();JPanel p1 = new JPanel();cc.add(p1, BorderLayout.NORTH);p1.setBackground(new Color(200,200,250);ta = new TextArea();cc.add(ta, BorderLayout.CENTER);JPanel p2 = new JPanel();cc.add(p2, BorderLayout.SOUTH);p2.setBackground(new Color(250,150,200);ta.setForeground(new Color(0,0,250);JLabel p3 = new JLabel(new ImageIcon(2010.jpg);cc.add(p3, BorderLayout.EAST);p1.add(new JLabel(昵称:);name=new JTextField(,6);p1.add(name); name.setFont(new Font(宋体,Font.BOLD,14);p1.add(new JLabel(IP: );ip = new JTextField(, 15);p1.add(ip);p1.add(new JLabel(Port: );port = new JTextField(7777, 4);p1.add(port);ss_server = new JButton(侦听);ss_server.setForeground(new Color(150,100,250);ss_server.setFont(new Font(宋体,Font.BOLD,14);p1.add(ss_server);ss_client = new JButton(连接);ss_client.setForeground(new Color(150,100,250);ss_client.setFont(new Font(宋体,Font.BOLD,14);p1.add(ss_client);ss_clear = new JButton(清除);ss_clear.setForeground(new Color(150,100,250);ss_clear.setFont(new Font(宋体,Font.BOLD,14);p1.add(ss_clear);ss_exit = new JButton(退出);ss_exit.setForeground(new Color(150,100,250);ss_exit.setFont(new Font(宋体,Font.BOLD,14);p1.add(ss_exit); p2.setLayout(new BorderLayout();p2.add(new JLabel(发送消息：),BorderLayout.WEST);p2.setBackground(new Color(200,200,250);send_text = new JTextField(在？);p2.add(send_text, BorderLayout.CENTER);ss_send = new JButton(发送);p2.add(ss_send, BorderLayout.EAST);ss_clear.addActionListener(this);ss_exit.addActionListener(this); send_text.addKeyListener(this);ss_server.addActionListener(this);ss_client.addActionListener(this);ss_send.addActionListener(this);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);public static void main(String args)new Chatroom().setVisible(true);清除聊天信息退出聊天作为对比，左边聊天已退出5-3 利用Socket类和ServerSocket类，编写一个C/S程序，实现网络文件传输。服务端package socket;import java.io.BufferedInputStream;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import .ServerSocket;import .Socket;public class Newserver int port = 8821; void start() Socket s = null; try ServerSocket ss = new ServerSocket(port); / 选择进行传输的文件 String filePath = D:test.txt; File fi = new File(filePath); / public Socket accept() throws / IOException侦听并接受到此套接字的连接。此方法在进行连接之前一直阻塞。 s = ss.accept(); System.out.println(服务端运行开始okokok!); System.out.println(服务器的线程1启动，与客户端1连接成功); DataInputStream dis = new DataInputStream(new BufferedInputStream(s.getInputStream(); dis.readByte(); DataInputStream fis = new DataInputStream(new BufferedInputStream(new FileInputStream(filePath); DataOutputStream ps = new DataOutputStream(s.getOutputStream(); System.out.println(要传输的文件为：+filePath); System.out.println(开始传输文件); /将文件名及长度传给客户端。这里要真正适用所有平台，例如中文名的处理，还需要加工，具体可以参见Think In Java 4th里有现成的代码。 ps.writeUTF(fi.getPath()+fi.getName(); ps.flush(); ps.writeLong(long) fi.length(); ps.flush(); int bufferSize = 8192; byte buf = new bytebufferSize; while (true) int read = 0; if (fis != null) read = fis.read(buf); if (read = -1) break; ps.write(buf, 0, read); ps.flush(); / 注意关闭socket链接哦，不然客户端会等待server的数据过来， / 直到socket超时，导致数据不完整。 fis.close(); s.close(); ss.close(); System.out.println(文件传输完成); catch (Exception e) e.printStackTrace(); public static void main(String arg) new Newserver().start(); 客户端package fasf;import java.io.BufferedOutputStream;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.FileOutputStream;public class Newclient private ClientSocket cs = null; private String ip = localhost;/ 设置成服务器IP private int port = 8821; private String sendMessage = Windwos; public Newclient() try if (createConnection() sendMessage(); getMessage(); catch (Exception ex) ex.printStackTrace(); private boolean createConnection() cs = new ClientSocket(ip, port); try cs.CreateConnection(); System.out.print(与服务器连接成功! + n); return true; catch (Exception e) System.out.print(与服务器连接失败! + n); return false; private void sendMessage() if (cs = null) return; try cs.sendMessage(sendMessage); catch (Exception e) System.out.print(发送消息失败! + n); private void getMessage() if (cs = null) return; DataInputStream inputStream = null; try inputStream = cs.getMessageStream(); catch (Exception e) System.out.print(接收消息缓存错误n); return; try /本地保存路径，文件名会自动从服务器端继承而来。 String savePath ; int bufferSize = 8192; byte buf = new bytebufferSize; int passedlen = 0; long len=0; savePath = inputStream.readUTF(); DataOutputStream fileOut = new DataOutputStream(new BufferedOutputStream(new BufferedOutputStream(new FileOutputStream(savePath); len = inputStream.readLong(); while (true) int read = 0; if (inputStream != null) read = inputStream.read(buf); passedlen += read; if (read = -1) break; System.out.println(接收到的文件为: + savePath + n); System.out.println(保存为: + savePath + n); fileOut.close(); catch (Exception e) System.out.println(接收消息错误 + n); return; public static void main(String arg) new Newclient(); 辅助类package fasf;import .*;import java.io.*;public class ClientSocket private String ip; private int port; private Socket socket = null; DataOutputStream out = null; DataInputStream getMessageStream = null; public ClientSocket(String ip, int port) this.ip = ip; this.port = port; /* * 创建socket连接 * * throws Exception * exception */ public void CreateConnection() throws Exception try socket = new Socket(ip, port); catch (Exception e) e.printStackTrace(); if (socket != null) socket.close(); throw e; finally public void sendMessage(String sendMessage) throws Exception try out = new DataOutputStream(socket.getOutputStream(); if (sendMessage.equals(Windows) out.writeByte(0x1); out.flush(); return; if (sendMessage.equals(Unix) out.writeByte(0x2); out.flush(); return; if (sendMessage.equals(Linux) out.writeByte(0x3); out.flush(); else out.writeUTF(sendMessage); out.flush(); catch (Exception e) e.printStackTrace(); if (out != null) out.close(); throw e; finally public DataInputStream getMessageStream() throws Exception try getMessageStream = new DataInputStream(new BufferedInputStream(socket.getInputStream(); return getMessageStream; catch (Exception e) e.printStackTrace(); if (getMessageStream != null) getMessageStream.close(); throw e; finally public void shutDownConnection() try if (out != null) out.close(); if (getMessageStream != null) getMessageStream.close(); if (socket != null) socket.close(); catch (Exception e) 实验结果：（此页附完成的实验结果、并给出个人对结果的分析、结论）实验过程与截图即实验结果。实验小结：（实验中出现问题的解决方法，实验心得体会等）该次实验虽然耗时较长，但难度不大。能很好的巩固上学期所学的Java编程。对Socket网络编程又有了进一步的了解。本以为计算机网络是一门理论课，没想到还有代码实践，两者可谓相辅相成，互为补充。计算机网络果然是一门极具实践意义的课程。指导教师批阅意见：成绩评定： 指导教师签字： 年 月 日备注：幸福，不能用手去捉摸，只能用心去琢磨，只能静静去体味。细细地品味了，你就享受到了它温馨的暖，或浓或淡的甜！幸福，其实很简单。幸福就是和爱人一起漫步，幸福就是吃到妈妈的拿手饭菜，幸福就是孩子在你的脚跟前转悠，幸福就是你能帮父母洗衣洗碗。幸福，其实很简单。拥有一份称心的工作，就是一种幸福；拥有一个温馨的家，就是一种幸福；拥有一位知心的朋友，就是一种幸福；拥有一份好的心态，就是一种幸福；拥有一个相濡以沫的爱人，那更是一种幸福。幸福就是如此的平平凡凡，幸福就是这样的简简单单。幸福，其实就是自己心灵的感觉，沉淀在自己的心底，看不见摸不着，没有那么直观，可那种体验与享受却