Java聊天程序实验报告.doc

Java网络通信一、 实验内容1、 图形界面编程，利用TCP的socket或者UDP编写，客户端和服务器端程序可以进行多次对话。2、 利用程序，访问一个网站，将指定的一个页面保存到本地。二、 实验目的1、学习java网络通信中的Socket编程，熟悉TCP和UDP的应用。 2、学习网络编程的基础内容，了解TCP/IP协议的简单概念，和JAVA结合编程。3、实现事件的处理，比如说鼠标的单击，按下等操作。三、 实验分析1、UDP中Socket中的编程也分为服务器和客户端，与TCP不同的是它无需建立、拆除连接，直接将信息打包传向指定的目的地，使用起来比TCP要简单一些。2、第三个程序，我写了一个简单的网页浏览器，功能不是很全面，但是能实现，查看源文件，保存，全屏，还原等功能，还能自动修正输入的网络地址。就是有时候图片显示还有点问题。主要用到了JEditorPane中的setPage()解析html文件。四、 程序代码1、 UDP服务端import java.io.*;import .*;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class UDPServer extends JFrameJTextField jtf=new JTextField(30);JTextArea jta=new JTextArea();JButton jb=new JButton(发送);JPanel jp=new JPanel();DatagramSocket serversocket=null;DatagramPacket serverpacket=null,serverpacket1=null;InetAddress address;int port;String datagram;public UDPServer()jp.setLayout(new FlowLayout();jp.add(jtf);jp.add(jb);this.getContentPane().add(jp,BorderLayout.SOUTH);this.getContentPane().add(new JScrollPane(jta),BorderLayout.CENTER);jta.setEditable(false);jb.addActionListener(new buttonListener();setTitle(服务器);setSize(600,400);setVisible(true);this.addWindowListener(new winAdpt();tryserversocket=new DatagramSocket(5555);jta.append(服务器已启动正在监听端口5555.+n);catch(Exception eg)while(true)trybyte databuf=new byte512;serverpacket=new DatagramPacket(databuf,512);serversocket.receive(serverpacket);address=serverpacket.getAddress();port=serverpacket.getPort();datagram=new String(serverpacket.getData();jta.append(datagram+n);catch(IOException ex)jta.append(ex.toString()+n);public static void main(String args) new UDPServer();class winAdpt extends WindowAdapterpublic void windowClosing(WindowEvent e)tryserversocket.close();serversocket=null;catch(Exception ea)e.getWindow().dispose();System.exit(0);class buttonListener implements ActionListenerpublic void actionPerformed(ActionEvent e)trybyte databuf=new byte512;datagram=jtf.getText();databuf=datagram.getBytes();serverpacket1=new DatagramPacket(databuf,databuf.length,address,port);serversocket.send(serverpacket1);catch(IOException ex)jta.append(e.toString()+n);2、 UDP客户端import java.io.*;import .*;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class UDPClient extends JFrameJTextField jtf=new JTextField(30);JTextArea jta=new JTextArea();JButton jb=new JButton(发送);JPanel jp=new JPanel();DatagramSocket socket=null;DatagramPacket packet=null,packet1=null;String datagram=null;InetAddress address=null;public UDPClient()jp.setLayout(new FlowLayout();jp.add(jtf);jp.add(jb);this.getContentPane().add(jp,BorderLayout.SOUTH);this.getContentPane().add(new JScrollPane(jta),BorderLayout.CENTER);jta.setEditable(false);jb.addActionListener(new buttonListener();setTitle(客户端);setSize(600,400);setVisible(true);this.addWindowListener(new winAdpt();trysocket=new DatagramSocket(6666);address=InetAddress.getByName();catch(IOException eg)while(true)trybytedatabuf=new byte512;packet=new DatagramPacket(databuf,512);socket.receive(packet);datagram=new String(packet.getData();jta.append(datagram+n);catch(Exception e)public static void main(String args) new UDPClient();class buttonListener implements ActionListenerpublic void actionPerformed(ActionEvent e)trydatagram=jtf.getText();byte databuf=datagram.getBytes();packet1=new DatagramPacket(databuf,databuf.length,address,5555);socket.send(packet1);catch(IOException ex)jta.append(e.toString()+n);class winAdpt extends WindowAdapterpublic void windowClosing(WindowEvent e)trysocket.close();socket=null;catch(Exception ea)e.getWindow().dispose();System.exit(0);3、 浏览器程序MyWebBrowser.java文件import .*;import javax.swing.*;import javax.swing.event.*;import java.awt.*;import java.awt.event.*;import java.util.*;import java.io.*;public class MyWebBrowser implements ActionListener/窗口/JFrame mainwindow=new JFrame(我的浏览器);/主窗口Container contentpane=mainwindow.getContentPane();/内容窗格JWindow fullscreen=new JWindow(mainwindow);/建立全屏窗格Container contentpane1=fullscreen.getContentPane();/菜单/JMenuBar menuBar=new JMenuBar();/创建菜单条JMenu menu_file=new JMenu(文件);/创建“文件”菜单项JMenuItem file_saveas=new JMenuItem(另存为);/“另存为”菜单项子项JMenuItem file_exit=new JMenuItem(退出);JMenu menu_edit=new JMenu(编辑);/创建“编辑”菜单项JMenuItem edit_cut=new JMenuItem(剪切);/“剪切”菜单项子项JMenuItem edit_copy=new JMenuItem(复制);JMenuItem edit_paste=new JMenuItem(粘贴);JMenu menu_view=new JMenu(视图);/创建“视图”菜单项JPopupMenu fromto=new JPopupMenu(转到);/“转到”菜单项子项JMenuItem pop_backward=new JMenuItem(后退);/”后退“JMenuItem pop_forward =new JMenuItem(前进);/“前进”JMenuItem view_reload=new JMenuItem(刷新);JMenuItem view_getsource=new JMenuItem(源文件);JMenuItem view_fullscreen=new JMenuItem(全屏);JMenu menu_help=new JMenu(帮助);/“帮助”菜单项JMenuItem aboutme=new JMenuItem(关于);/工具条/JToolBar toolbar=new JToolBar();/定义工具条JButton tool_backward=new JButton(后退); /“后退”JButton tool_forward=new JButton(前进);/“前进”JLabel prompt=new JLabel(地址：);/地址标签JTextField address=new JTextField(10);/文本框，用于输入URLJButton go=new JButton(转到/刷新);/转到按钮JButton stop=new JButton(停止);JButton recover= new JButton(还原); /从最大化还原成最小化时的按钮，构造时不添加/内容框/JEditorPane editorpane= new JEditorPane ();JScrollPane scrollpane= new JScrollPane ();JTabbedPane tabbedpane=new JTabbedPane();/创建/其他变量/String url;ArrayList history=new ArrayList();/用于保存历史记录int historyindex;Dimension initsize=new Dimension(900,600);Dimension maxsize = Toolkit.getDefaultToolkit().getScreenSize();/屏幕大小/构造函数/public MyWebBrowser()menu_file.add(file_saveas);/将菜单子项加入到菜单项menu_file.addSeparator();/加一条分割线menu_file.add(file_exit);menuBar.add(menu_file);/将“文件”菜单项加入到菜单条中menu_edit.add(edit_cut);menu_edit.add(edit_copy);menu_edit.add(edit_paste);menuBar.add(menu_edit);fromto.add(pop_backward);fromto.add(pop_forward);menu_view.add(fromto);menu_view.add(view_reload);menu_view.addSeparator();/分割线menu_view.add(view_getsource);menu_view.add(view_fullscreen);menuBar.add(menu_view);menu_help.add(aboutme);menuBar.add(menu_help);mainwindow.setJMenuBar(menuBar);/把菜单条加入到整个JFrame容器中toolbar.add(tool_backward);toolbar.add(tool_forward);toolbar.add(prompt);toolbar.add(address);toolbar.add(go);toolbar.add(stop);contentpane.add(toolbar,BorderLayout.NORTH);/添加工具条editorpane.setEditable(false);/设置文本区域不能写scrollpane.getViewport().add(editorpane);/窗格可视区添加JEditorpanecontentpane.add(scrollpane,BorderLayout.CENTER);/添加滚动窗格file_saveas.addActionListener(this);/添加事件监听file_exit.addActionListener(this);edit_cut.addActionListener(this);edit_copy.addActionListener(this);edit_paste.addActionListener(this);pop_backward.addActionListener(this);pop_forward.addActionListener(this);view_reload.addActionListener(this);view_getsource.addActionListener(this);view_fullscreen.addActionListener(this);aboutme.addActionListener(this);tool_backward.addActionListener(this);tool_forward.addActionListener(this);address.addActionListener(this);go.addActionListener(this);stop.addActionListener(this);mainwindow.setSize(initsize);mainwindow.setVisible(true);/事件处理函数/public void actionPerformed(ActionEvent e)url=address.getText().trim();/获取URLif(e.getActionCommand()=转到/刷新|e.getSource()=address|e.getActionCommand()=刷新)if(url.length()0)if(!url.startsWith(http:/)url=http:/+url;if(!url.endsWith(/)url=url+/;tryeditorpane.setPage(url);address.setText(url);history.add(url);historyindex=history.size()-1;catch(Exception ex)JOptionPane.showMessageDialog (mainwindow,无法打开该搜索页,网页浏览器,JOptionPane.ERROR_MESSAGE);else if(e.getActionCommand()=后退)historyindex-;if(historyindex=history.size()historyindex=history.size()-1;tryurl=(String)history.get(historyindex);editorpane.setPage(url);address.setText(url);catch(Exception ex)JOptionPane.showMessageDialog (mainwindow,无法打开该搜索页,网页浏览器,JOptionPane.ERROR_MESSAGE);else if(e.getActionCommand()=源文件|e.getSource()=view_getsource)if(url.length()0)new sourcefile(url);else if(e.getActionCommand()=全屏)mainwindow.setVisible(false);toolbar.add(recover);contentpane1.add(toolbar,BorderLayout.NORTH);contentpane1.add(scrollpane, BorderLayout.CENTER);recover.addActionListener(new ActionListener ()public void actionPerformed(ActionEvent e1)contentpane1.remove(scrollpane);toolbar.remove(recover);contentpane1.remove(toolbar);fullscreen.setVisible (false); /还原mainwindow.add(toolbar,BorderLayout.NORTH);/添加工具条mainwindow.add(scrollpane,BorderLayout.CENTER);mainwindow.setSize(initsize);mainwindow.setVisible(true););fullscreen.setSize (maxsize); fullscreen.setVisible (true);else if(e.getActionCommand()=关于)JOptionPane.showMessageDialog (mainwindow,我的浏览器n版本：1.0,关于,JOptionPane.CLOSED_OPTION);public static void main(String args) new MyWebBrowser();Source_file.java文件import java.awt.*;import java.awt.event.*;import javax.swing.*;import .*;import java.io.*;public class