西安邮电学院通信软件设计说明

1、西安邮电学院实验报告课 程开课时间至学年第学期这个软件主要功能是以UDP为基础实现两台电脑之间收发简单文本消息。软 件全部使用java编写，并以JavaBuilder8为工具进行编写与调试。布局方式采 用NULL方式,主要使用AWT勺组件和部分SWING勺组件。使用方法如下：1首先在输入IP地址的输入栏中输入想与之进行通信的主机的IP地址，即消息接受方的IP地址。2在消息编辑框中输入想发送的消息容。3编辑完欲发送的消息后，点击“发送消息”按钮进行发送；4双方发送的消息和发送方与接受方的IP地址都会在下面的空白区域-“频道”显示。6如果没有输入IP地址便发送编辑完的文本消息，空白区域会显示出提示

2、信 息提示用户应输入接受方的IP地址。7当频道显示的消息太多时，可以按”刷新频道”来清除频道全部信息！软件运行时候的抓图:Zi« Uhl twdhtr.jTi# 乩丹和g r 0. $A|J话如濡£i ，nt * 自知血* '-H cRiPd"I £M3 (Mg血 t - It/Jdiwt/ctatfc &-i |krapbhrin '|m| A*i¥TQltw |-匸鬥T鬥叮IT址M J：卜uiwXE本机测试结果的抓图效果flL* 14xi 4«* Jt 聲讯士 * tel|J.«j 4*欝1>

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4、 恃 pi tssxurin卜h-t-, i -卜 i cctftiiFwB1- L4vv1 hM«f2iiEWAmdiirlV祢如孔G laciArvHl'IghflpFie#iijrxLiL_n 卜 uipp程序代码与简要说明1 chatFrame类的代码:package chat;import java .n et.*;import java.io.*;import java.awt.*;import java.awt.eve nt.*;import javax.swi ng.*;* vp>Title: </p>* <p>Descripti

5、o n: v/p>* <p>Copyright: Copyright (c) 2004</p>* <p>Compa ny: v/p>* author not attributable* versio n 1.0*/public class chatFrame exte nds JFrame JPa nel conten tPa ne;Label label1 = new Label();TextField textField1 = new TextField();Label label2 = new Label();TextField textF

6、ield2 = new TextField();Button button1 = new Button();TextArea textArea1 = new TextArea();DatagramPacket sendpacket,receivepacket; / 定义发送和接受数据 包DatagramSocket sendsocket,receivesocket;/ 定义发送和接受 DatagramSocket/Construct the frame public chatFrame() enableEvents(AWTEvent.WINDOW_EVENT_MASK); try jbInit

7、(); catch(Exception e) e.printStackTrace();/Component initializationprivate void jbInit() throws Exception / 定义个组件和他 们的布局contentPane = (JPanel) this.getContentPane(); label2.setAlignment(Label.CENTER); label2.setFont(new java.awt.Font("SansSerif", 0, 15); label2.setForeground(Color.black);

8、label2.setText(" 消息编辑框 "); label1.setBounds(new Rectangle(14, 17, 133, 32); contentPane.setLayout(null);this.setSize(new Dimension(500, 400);this.setTitle(" 用 UDP实现聊天"); textField1.setBackground(SystemColor.text); textField1.setColumns(0);textField1.setFont(new java.awt.Font(&quo

9、t;Dialog", 0, 16); textField1.setText("");textField1.setBounds(new Rectangle(129, 72, 200, 61); label1.setAlignment(Label.CENTER);label1.setFont(new java.awt.Font("Dialog", 0, 15);label1.setText(" 输入对方 IP 地址"); label2.setBounds(new Rectangle(23, 86, 108, 28);try se

10、ndsocket=new DatagramSocket(5000); / 初始化receivesocket=new DatagramSocket(5001);catch(SocketException se) / 可能产生 Socketexception 类 的异常se.printStackTrace(); System.exit(0);button1.setBackground(Color.magenta); button1.setFont(new java.awt.Font("Dialog", 0, 13);button1.setLabel(" 发送消息 &q

11、uot;); button1.setBounds(new Rectangle(374, 23, 88, 42);button1.addActionListener(new java.awt.event.ActionListener () public void actionPerformed(ActionEvent e)button1_actionPerformed(e); );textField2.setBackground(SystemColor.activeCaptionBorder); textField2.setFont(new java.awt.Font("Dialog&

12、quot;, 1, 18); textField2.setLocale(java.util.Locale.getDefault();textField2.setText("");textField2.setBounds(new Rectangle(166, 21, 169, 29); textArea1.setFont(new java.awt.Font("Dialog", 0, 13); textArea1.setText("");textArea1.setBounds(new Rectangle(46, 157, 382, 185

13、); contentPane.setBackground(new Color(113, 111, 159); jButton1.setBackground(Color.pink);jButton1.setBounds(new Rectangle(374, 86, 87, 42); jButton1.setFont(new java.awt.Font("Dialog", 0, 13);jButton1.setText(" 刷新频道 "); jButton1.addActionListener(new java.awt.event.ActionListene

14、r()public void actionPerformed(ActionEvent e) jButton1_actionPerformed(e););contentPane.add(label1, null);contentPane.add(textField2, null);contentPane.add(textField1, null); contentPane.add(label2, null);contentPane.add(textArea1, null); contentPane.add(jButton1, null);contentPane.add(button1, null

15、);/Overridden so we can exit when window is closed protected void processWindowEvent(WindowEvent e) cessWindowEvent(e);if (e.getID() = WindowEvent.WINDOW_CLOSING) System.exit(0);public void waitforpackets() / / 这个方法完成接受数据包的功能 while(true)trybytearray=new byte100;receivepacket=new DatagramPac

16、ket(array,array.length);/ 创建接受数据包的缓冲 receivesocket.receive(receivepacket);/ 接受数据包 textArea1.append("nfrom "+receivepacket.getAddress() +" : ");byte data=receivepacket.getData();String received=new String(data,0);/ 将字节数组转化为字符串 textArea1.append(received);catch(IOException se)/ 可能产生

17、的 IOException 类异常 textArea1.append(se.toString() +"/n");se.printStackTrace();void button1_actionPerformed(ActionEvent e)/ 这个方法完成发送数据包String str = textField2.getText();if(pareTo("")!=0)trytextArea1.append("nto "+textField2.getText() +" "+textField1.getText();St

18、ring s=textField1.getText(); byte data=new byte100; s.getBytes(0,s.length(),data,0);sendpacket=new DatagramPacket(data,s.length(),InetAddress.getByName(textField2.getText(),5001);/ 创建发送的数据包sendsocket.send(sendpacket);/ 发送数据包 catch(IOException exc)textArea1.append(exc.toString() +"n");exc.p

19、rintStackTrace();elsetextArea1.setText("please input your friend's IP first!");JButton jButton1 = new JButton();void jButton1_actionPerformed(ActionEvent e) textArea1.setText("");2.chatapp 类的代码 :package chat;import .*;import java.io.*;import javax.swing.UIManager;import java.

20、awt.*;/* <p>Title: </p>* <p>Description: </p>* <p>Copyright: Copyright (c) 2004</p>* <p>Company: </p>* author not attributable* version 1.0*/public class chatApp boolean packFrame = false;/Construct the applicationpublic chatApp() chatFrame frame = new chatFrame();/Validate frames that have preset sizes/Pack frames that have useful preferred size info, e.