Java网络编程技术-09.ppt

第9章 Java Socket网络编程案例,Java 网络白板程序设计,2,9.1 Java 网络白板程序设计 需求分析,1. 应用程序架构： Client/Server 2. 通信协议： TCP协议 3. 使用对象流ObjectInputStream和ObjectOutputStream传递类的实例对象 3. 程序界面,3,客户端登陆界面,4,Server,5,参考用例图：,1）网络消息协议类,6,参考时序图：,9.2使用对象流ObjectInputStream和ObjectOutputStream传递类的实例对象,7,（1）.使用Serializable接口，在服务器端通过ObjectInputSream 和ObjectOutputStream以及Socket类传送dog类的对象到客户端，在客户端接收由服务器端传送过来的dog对象，并输出器属性。 1）定义一个接口 继承Serializable 接口 import java.io.*; import .*; interface myDog extends Serializable void setAge(int a); int getAge(); void setName(String n); String getName(); void run(); ,8,客户端电子白板界面,dog class 实现 myDog 接口,class dog implements myDog private int age; private String name; public void setAge(int a) age=a; public int getAge() return age; public void setName(String n) name = n; public String getName() return name; public void run() System.out.println(“I can run fast!“); ,9,服务器端,public class OServer public static void main(String args) throws IOException dog d = new dog(); d.setAge(10); d.setName(“Tom“); System.out.println(d.getAge(); System.out.println(d.getName(); d.run(); ServerSocket s = new ServerSocket(8888); Socket ss = s.accept(); OutputStream out = ss.getOutputStream(); BufferedOutputStream b = new BufferedOutputStream(out); ObjectOutputStream oo = new ObjectOutputStream(b); oo.writeObject(d); oo.flush(); ,10,客户端接收dog对象,import java.io.*; import .*; public class OClient public static void main(String args) throws IOException,ClassNotFoundException Socket s=new Socket(““,8888); InputStream in=s.getInputStream(); BufferedInputStream input=new BufferedInputStream(in); ObjectInputStream inn=new ObjectInputStream(input); dog d=(dog)inn.readObject(); System.out.println(“client:“+d.getAge(); System.out.println(“client:“+d.getName(); d.run(); ,11,(2)简易白板,12,Server,Client,画图类对象,13,系统类图,画图类,import java.io.*; import java.util.*; import java.awt.*; public class randomLine implements Serializable Vector points=new Vector(); Color color=null; int x0,y0,x1,y1; Point point,start,end; public randomLine(Color c) this.color=c; public void setPoints(int x,int y) point=new Point(x,y); this.points.add(point); ,14,public void paint(Graphics g) g.setColor(color); Enumeration allPoints=points.elements(); start=(Point)allPoints.nextElement(); x0=(int)start.getX(); y0=(int)start.getY(); while(allPoints.hasMoreElements() end=(Point)allPoints.nextElement(); x1=(int)end.getX(); y1=(int)end.getY(); g.drawLine(x0, y0, x1, y1); x0=x1; y0=y1; ,15,16,服务器端,import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.io.*; import .*; public class myPanel extends JPanel private randomLine ranLine=new randomLine(Color.red); private ServerSocket s; private Socket ss; private ObjectOutputStream output; private OutputStream os ; private BufferedOutputStream b ; private Graphics g; public int x0,y0,x1,y1;,17,public myPanel() setBounds(0,0,400,300); setBackground(Color.white); addMouseMotionListener(new mouseAction(); addMouseListener(new mousemovpress(); this.validate(); new myThread().start(); public void paint(Graphics g) ,18,class mouseAction extends MouseMotionAdapter public void mouseDragged(MouseEvent e) g=getGraphics(); g.setColor(Color.red); x1=e.getX(); y1=e.getY(); g.drawLine(x0,y0, x1, y1); x0=x1; y0=y1; ranLine.setPoints(x1,y1); ,19,class mousemovpress extends MouseAdapter public void mousePressed(MouseEvent e) x0=e.getX(); y0=e.getY(); public void mouseReleased(MouseEvent e) try os = ss.getOutputStream(); b = new BufferedOutputStream(os); output = new ObjectOutputStream(b); output.writeObject(ranLine); output.flush(); catch(IOException ex) ,20,class myThread extends Thread public void run() try s=new ServerSocket(1234); ss=s.accept(); catch(IOException ex) ,21,class myFrame extends JFrame myPanel p=new myPanel(); public myFrame() super(“白板服务器“); setLayout(null); setBounds(100,100,400,300); add(p); setVisible(true); this.addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) System.exit(0); ); ,22,public static void main(String ss) new myFrame(); ,23,客户端,import java.awt.*; import java.io.*; import .*; import java.awt.event.*; import javax.swing.*; public class myClientPanel extends JPanel private randomLine ranLine; private Socket ss; private InputStream is; private BufferedInputStream b; private ObjectInputStream input; private JFrame f;,24,public myClientPanel(JFrame f) this.f=f; setBounds(0, 0, 400, 300); setBackground(Color.white); this.validate(); new myThread().start(); try ss = new Socket(““, 1234); catch (IOException ex) f.setTitle(“error“); ,25,public void paint(Graphics g) this.ranLine.paint(g); class myThread extends Thread public void run() while (true) try is = ss.getInputStream(); b = new BufferedInputStream(is); input = new ObjectInputStream(b); ranLine = (randomLine)input.readObject(); repaint(); catch (Exception ex) ,26,class myClientFrame extends JFrame myClientPanel p = new myClientPanel(this); public myClientFram