实验一 设计模式综合应用(一)附源码+UML图.doc

注：班里的可以向我要工程文件实验一 设计模式综合应用（一）一、实验目的：熟练掌握Java设计模式中的命令模式和观察者模式，并培养学生将两者综合应用到具体软件项目中的能力。二、实验内容：制作如图1所示GUI界面，需求如下：1. 鼠标左键点击界面时，在鼠标所在位置填充一个直径为20像素的圆，并在界面上方的标签上显示“新增圆点位于：(x,y)”；2. 鼠标右键点击时，则实现undo操作，将最后填充的圆点从界面中删除，并在界面上方的标签上显示“删除圆点位于：(x,y)”；3. 界面下方的标签随时显示“鼠标位于：(x,y)”；图1 GUI界面三、实验要求：1. 绘制和撤销圆点使用命令模式；2. 两个标签内容的变更使用观察者模式；3. 在代码实现之前，进行UML类图设计；4. 根据UML类图，在eclipse中编程实现程序的功能。四、实验学时：2+2学时（课外2个学时）五、提示：1设计一个Circle类，该类对象用来记录某个填充圆的信息；2. 每填充一个圆点，就实例化一个Circle类对象，并将其放置到具体命令对象关联的List对象中，用来作为undo操作的依据；3. 填充圆可以使用Graphics的fillOval方法；4. 删除圆可以先将Graphics对象的颜色设置为画布的背景色，再使用Graphics的fillRect方法；5. 标签显示内容的需求不用观察者模式就可以轻松实现，但要求使用观察者模式进行设计；5. 实验完成后，将UML文件和程序的工程文件打包，命名为“实验一.rar”，并上传至2。六 UML图七 源代码1.package lsu.egg.sy1;public class Circle private int x;private int y;Circle(int x, int y) this.x = x;this.y = y;public int getX() return x;public void setX(int x) this.x = x;public int getY() return y;public void setY(int y) this.y = y;2.package lsu.egg.sy1;import javax.swing.JPanel;public interface Command public void excute(JPanel jpanel, Circle circle);public void undo(JPanel jpanel);3.package lsu.egg.sy1;import java.util.ArrayList;import javax.swing.JPanel;public class ConcreteCommand implements Command private Receiver receiver;private ArrayList arraylist;private ConcreteOfInvoker concreteofinvoker;ConcreteCommand(Receiver receiver, ConcreteOfInvoker concreteofinvoker) this.receiver = receiver;this.arraylist = new ArrayList();this.concreteofinvoker = concreteofinvoker;Overridepublic void excute(JPanel jpanel, Circle circle) receiver.addSpot(jpanel, circle);arraylist.add(circle);Overridepublic void undo(JPanel jpanel) Circle circle;if(arraylist.size()=1)circle = arraylist.get(arraylist.size() - 1);receiver.deleteSpotr(jpanel, circle);arraylist.remove(arraylist.size() - 1);int n = 2;concreteofinvoker.notifyObservers(n, circle.getX(), circle.getY();4. package lsu.egg.sy1;import javax.swing.JLabel;SuppressWarnings(serial)public class ConcreteObserver1 extends JLabel implements Observer ConcreteObserver1() super(新增圆点位于：(0,0);Overridepublic void update(int n, int x, int y) if(n=1)this.setText(新增圆点位于：( + x + , + y + );else if(n=2)this.setText(删除圆点位于：( + x + , + y + );5. package lsu.egg.sy1;import javax.swing.JLabel;SuppressWarnings(serial)public class ConcreteObserver2 extends JLabel implements Observer Overridepublic void update(int n, int x, int y) this.setText(鼠标位于：( + x + , + y + );6. package lsu.egg.sy1;public interface ConcreteOfInvoker public void notifyObservers(int n, int x ,int y);7.package lsu.egg.sy1;import java.util.ArrayList;public class ConcreteSubject implements ConcreteOfInvoker, Subject ArrayList arraylist;ConcreteSubject() arraylist = new ArrayList();Overridepublic void addObserver(Observer observer) arraylist.add(observer);Overridepublic void deleteObserver(Observer observer) arraylist.remove(observer);Overridepublic void notifyObservers(int n, int x ,int y) for(Observer observer : arraylist)observer.update(n, x ,y);8.package lsu.egg.sy1;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.awt.event.MouseMotionListener;import javax.swing.JPanel;SuppressWarnings(serial)public class Invoker extends JPanel private Command command;private ConcreteOfInvoker concreteofinvoker;Invoker(Command command, ConcreteOfInvoker concreteofinvoker) mand = command;this.concreteofinvoker = concreteofinvoker;this.addMouseListener(new Mouse();this.addMouseMotionListener(new MouseMotion();class Mouse implements MouseListener Overridepublic void mouseClicked(MouseEvent arg0) excuteCommand(arg0);Overridepublic void mouseEntered(MouseEvent arg0) / TODO 自动生成的方法存根Overridepublic void mouseExited(MouseEvent arg0) / TODO 自动生成的方法存根Overridepublic void mousePressed(MouseEvent arg0) / TODO 自动生成的方法存根Overridepublic void mouseReleased(MouseEvent arg0) / TODO 自动生成的方法存根class MouseMotion implements MouseMotionListener Overridepublic void mouseDragged(MouseEvent arg0) / TODO 自动生成的方法存根Overridepublic void mouseMoved(MouseEvent arg0) int n = 0;concreteofinvoker.notifyObservers(n, arg0.getX(), arg0.getY();public void excuteCommand(MouseEvent mouseevent) int x = mouseevent.getX();int y = mouseevent.getY();Circle circle = new Circle(x, y);if(mouseevent.getButton()=MouseEvent.BUTTON1)mand.excute(this, circle);int n = 1;concreteofinvoker.notifyObservers(n, mouseevent.getX(), mouseevent.getY();else if(mouseevent.getButton()=MouseEvent.BUTTON3)mand.undo(this);9.package lsu.egg.sy1;public interface Observer public void update(int n, int x, int y);10.package lsu.egg.sy1;import java.awt.Color;import java.awt.Graphics2D;import java.awt.Shape;import java.awt.geom.Ellipse2D;import javax.swing.JPanel;public class Receiver private Graphics2D graphics2D;public void addSpot(JPanel jpanel, Circle circle) Shape shape = new Ellipse2D.Double(circle.getX()-10, circle.getY()-10, 20, 20);graphics2D = (Graphics2D) jpanel.getGraphics();graphics2D.setPaint(Color.black);graphics2D.fill(shape);public void deleteSpotr(JPanel jpanel, Circle circle) Shape shape = new Ellipse2D.Double(circle.getX()-10, circle.getY()-10, 20, 20);graphics2D = (Graphics2D) jpanel.getGraphics();graphics2D.setPaint(jpanel.getBackground();graphics2D.fill(shape);11. package lsu.egg.sy1;public interface Subject public void addObserver(Observer observer);public void deleteObserver(Observer observer);12.package lsu.egg.sy1;import javax.swing.JFrame;SuppressWarnings(serial)public class Test extends JFrameTest() Receiver receiver = new Receiver();ConcreteSubject co