设计模式实验6_命令模式

实验报告课程： 设计模式实验 学期： 2010-2011学年 第一学期 任课教师： 专业： 学号： 姓名： 成绩： 实验6 命令模式1.题目: 使用命令模式实现在用户界面中,用户选择需要绘制的图形(矩形、三角形、圆形),并在用户界面中绘制该图形,并能够实现撤销多步的功能。2.模式设计的UML类图：3.程序源代码：（1）命令接口Command.java:public interface Command public void execute();public void undo();public class NoCommand implements Commandpublic void execute()public void undo() （2）绘制图形的各个类：import java.awt.*;import java.awt.geom.*;import javax.swing.*;public class DrawSquare extends JPanel private static DrawSquare panel=new DrawSquare(); public static DrawSquare getJPanel() return panel; public void paintComponent(Graphics g)Graphics2D g2 = (Graphics2D)g;super.paintComponent(g);double rectX =130;double rectY = 40; /设置坐标的初始值double width = 100;double height = 100;Rectangle2D rect = new Rectangle2D.Double(rectX,rectY,width,height);g2.draw(rect); public class DrawRectanqleLong extends JPanel private static DrawRectanqleLong panel=new DrawRectanqleLong();public static DrawRectanqleLong getJPanel() return panel; public void paintComponent(Graphics g)Graphics2D g2 = (Graphics2D)g;super.paintComponent(g);double rectX = 110;double rectY = 40; /设置坐标的初始值double width = 150;double height = 100;Rectangle2D rect = new Rectangle2D.Double(rectX,rectY,width,height);g2.draw(rect); public class DrawRectanqleHeight extends JPanel private static DrawRectanqleHeight panel=new DrawRectanqleHeight();public static DrawRectanqleHeight getJPanel() return panel; public void paintComponent(Graphics g)Graphics2D g2 = (Graphics2D)g;super.paintComponent(g);double rectX = 135;double rectY = 30; /设置坐标的初始值double width = 85;double height = 130;Rectangle2D rect = new Rectangle2D.Double(rectX,rectY,width,height);g2.draw(rect); public class DrawTrianqle extends JPanel private static DrawTrianqle panel=new DrawTrianqle();public static DrawTrianqle getJPanel()return panel; public void paintComponent(Graphics g)Graphics2D g2 = (Graphics2D)g;super.paintComponent(g);double point1X =180;double point1Y = 40; /设置坐标的初始值double point2X =130;double point2Y = 120;double point3X =210;double point3Y = 150;Line2D line1 = new Line2D.Double(point1X,point1Y,point2X,point2Y);Line2D line2 = new Line2D.Double(point1X,point1Y,point3X,point3Y);Line2D line3 = new Line2D.Double(point2X,point2Y,point3X,point3Y);g2.draw(line1); g2.draw(line2); g2.draw(line3); public class DrawRightanqleTrianqle extends JPanelprivate static DrawRightanqleTrianqle panel=new DrawRightanqleTrianqle();public static DrawRightanqleTrianqle getJPanel() return panel; public void paintComponent(Graphics g)Graphics2D g2 = (Graphics2D)g;super.paintComponent(g);double point1X =180;double point1Y = 20; /设置坐标的初始值double point2X =130;double point2Y = 150;double point3X =230;double point3Y = 150;Line2D line1 = new Line2D.Double(point1X,point1Y,point2X,point2Y);Line2D line2 = new Line2D.Double(point1X,point1Y,point3X,point3Y);Line2D line3 = new Line2D.Double(point2X,point2Y,point3X,point3Y);g2.draw(line1); g2.draw(line2); g2.draw(line3); public class DrawIsoscelesTrianqle extends JPanelprivate static DrawIsoscelesTrianqle panel=new DrawIsoscelesTrianqle();public static DrawIsoscelesTrianqle getJPanel() return panel; public void paintComponent(Graphics g)Graphics2D g2 = (Graphics2D)g;super.paintComponent(g);double point1X =150;double point1Y = 20; /设置坐标的初始值double point2X =150;double point2Y = 150;double point3X =250;double point3Y = 150;Line2D line1 = new Line2D.Double(point1X,point1Y,point2X,point2Y);Line2D line2 = new Line2D.Double(point1X,point1Y,point3X,point3Y);Line2D line3 = new Line2D.Double(point2X,point2Y,point3X,point3Y);g2.draw(line1); g2.draw(line2); g2.draw(line3); public class DrawCircle extends JPanelprivate static DrawCircle panel=new DrawCircle();public static DrawCircle getJPanel() return panel; public void paintComponent(Graphics g)Graphics2D g2 = (Graphics2D)g;super.paintComponent(g);double circleX = 180;double circleY = 90;double radius = 50; /设置坐标的初始值Ellipse2D circle = new Ellipse2D.Double();circle.setFrameFromCenter(circleX, circleY,circleX+radius,circleY+radius);g2.draw(circle); /画圆public class DrawEllipse extends JPanel private static DrawEllipse panel=new DrawEllipse();public static DrawEllipse getJPanel()return panel; public void paintComponent(Graphics g)Graphics2D g2 = (Graphics2D)g;super.paintComponent(g);double ellipseX = 115;double ellipseY = 30; /设置坐标的初始值double width = 150;double height = 100;Rectangle2D rect = new Rectangle2D.Double(ellipseX,ellipseY,width,height);Ellipse2D ellipse = new Ellipse2D.Double();ellipse.setFrame(rect);g2.draw(ellipse); public class DrawSolidCircle extends JPanelprivate static DrawSolidCircle panel=new DrawSolidCircle();public static DrawSolidCircle getJPanel()return panel; public void paintComponent(Graphics g)Graphics2D g2 = (Graphics2D)g;super.paintComponent(g);double circleX = 180;double circleY = 90;double radius = 50; /设置坐标的初始值Ellipse2D circle = new Ellipse2D.Double();circle.setFrameFromCenter(circleX, circleY,circleX+radius,circleY+radius);g2.setPaint(Color.BLUE); /设置圆的颜色g2.fill(circle);g2.draw(circle); /画圆（3）实现各种命令的类：public class DrawSquareCommand implements CommandDrawSquare drawSquare;public DrawSquareCommand(DrawSquare drawSquare) this.drawSquare = drawSquare; public void execute()drawSquare.setVisible(true);DrawFrame.getJFrame().add(drawSquare);public void undo()drawSquare.setVisible(true);DrawFrame.getJFrame().add(drawSquare); public class DrawRectanqleLongCommand implements CommandDrawRectanqleLong drawRectanqleLong;public DrawRectanqleLongCommand(DrawRectanqleLong drawRectanqleLong) this.drawRectanqleLong = drawRectanqleLong;public void execute()drawRectanqleLong.setVisible(true);DrawFrame.getJFrame().add(drawRectanqleLong);public void undo()drawRectanqleLong.setVisible(true);DrawFrame.getJFrame().add(drawRectanqleLong); public class DrawRectanqleHeightCommand implements CommandDrawRectanqleHeight drawRectanqleHeight;public DrawRectanqleHeightCommand(DrawRectanqleHeight drawRectanqleHeight)this.drawRectanqleHeight = drawRectanqleHeight; public void execute()drawRectanqleHeight.setVisible(true);DrawFrame.getJFrame().add(drawRectanqleHeight);public void undo()drawRectanqleHeight.setVisible(true);DrawFrame.getJFrame().add(drawRectanqleHeight); public class DrawTrianqleCommand implements CommandDrawTrianqle drawTrianqle;public DrawTrianqleCommand(DrawTrianqle drawTrianqle) this.drawTrianqle = drawTrianqle; public void execute()drawTrianqle.setVisible(true);DrawFrame.getJFrame().add(drawTrianqle);public void undo()drawTrianqle.setVisible(true);DrawFrame.getJFrame().add(drawTrianqle); public class DrawRightanqleTrianqleCommand implements CommandDrawRightanqleTrianqle drawRightanqleTrianqle;public DrawRightanqleTrianqleCommand(DrawRightanqleTrianqle drawRightanqleTrianqle)this.drawRightanqleTrianqle = drawRightanqleTrianqle;public void execute()drawRightanqleTrianqle.setVisible(true);DrawFrame.getJFrame().add(drawRightanqleTrianqle);public void undo()drawRightanqleTrianqle.setVisible(true);DrawFrame.getJFrame().add(drawRightanqleTrianqle); public class DrawIsoscelesTrianqleCommand implements CommandDrawIsoscelesTrianqle drawIsoscelesTrianqle;public DrawIsoscelesTrianqleCommand(DrawIsoscelesTrianqle drawIsoscelesTrianqle)this.drawIsoscelesTrianqle = drawIsoscelesTrianqle;public void execute()drawIsoscelesTrianqle.setVisible(true);DrawFrame.getJFrame().add(drawIsoscelesTrianqle);public void undo()drawIsoscelesTrianqle.setVisible(true);DrawFrame.getJFrame().add(drawIsoscelesTrianqle); public class DrawCircleCommand implements CommandDrawCircle drawCircle;public DrawCircleCommand(DrawCircle drawCircle)this.drawCircle = drawCircle;public void execute()drawCircle.setVisible(true);DrawFrame.getJFrame().add(drawCircle);public void undo()drawCircle.setVisible(true);DrawFrame.getJFrame().add(drawCircle); public class DrawEllipseCommand implements CommandDrawEllipse drawEllipse;public DrawEllipseCommand(DrawEllipse drawEllipse)this.drawEllipse = drawEllipse;public void execute()drawEllipse.setVisible(true);DrawFrame.getJFrame().add(drawEllipse);public void undo()drawEllipse.setVisible(true);DrawFrame.getJFrame().add(drawEllipse); public class DrawSolidCircleCommand implements CommandDrawSolidCircle drawSolidCircle;public DrawSolidCircleCommand(DrawSolidCircle drawSolidCircle)this.drawSolidCircle = drawSolidCircle;public void execute()drawSolidCircle.setVisible(true);DrawFrame.getJFrame().add(drawSolidCircle);public void undo()drawSolidCircle.setVisible(true);DrawFrame.getJFrame().add(drawSolidCircle); （4）遥控控制类RemoteControl.java：import java.util.ArrayList;public class RemoteControl Command firstCommands;Command secondCommands;Command thirdCommands;ArrayList undoCommand =new ArrayList();Command noCommand=new NoCommand();public RemoteControl()firstCommands = new Command3;secondCommands = new Command3;thirdCommands = new Command3;for(int i=0;i1)undoCommand.get(undoCommand.size()-1).undo();undoCommand.remove(undoCommand.size()-1);elseSystem.out.println(Here is end, you cant undo);（5）用户界面类DrawFrame.java：import java.awt.*;import javax.swing.*;import java.awt.event.*;public class DrawFrame extends JFrame private static DrawFrame frame = new DrawFrame();public static DrawFrame getJFrame()return frame; public DrawFrame() super(XXXXX); setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); initComponents(); private void initComponents() remoteControl.setCommand(0, square, rectanqleLong, rectanqleHeight);remoteControl.setCommand(1, trianql, rightTrianqle, isoscelesTrianqle);remoteControl.setCommand(2, circl, ellipse, solidCircle);northPanel = new JPanel();southPanel = new JPanel();nullJPanel = new JPanel(); JLabel rectanqleLabel = new JLabel(矩形 ,SwingConstants.LEFT);JLabel trianqleLabel = new JLabel(三角形,SwingConstants.CENTER);JLabel circleLabel = new JLabel(圆形,SwingConstants.RIGHT); rectanqleBox = new JComboBox(); trianqleBox = new JComboBox(); circleBox = new JComboBox(); undoButton = new JButton(撤销); rectanqleBox.addItem(); rectanqleBox.addItem(正方形);rectanqleBox.addItem(长方形（长宽）); rectanqleBox.addItem(长方形（长宽）) nullJPanel.setVisible(false); DrawSquare.getJPanel().setVisible(false); DrawRectanqleLong.getJPanel().setVisible(false); DrawRectanqleHeight.getJPanel().setVisible(false); DrawTrianqle.getJPanel().setVisible(false); DrawRightanqleTrianqle.getJPanel().setVisible(false); DrawIsoscelesTrianqle.getJPanel().setVisible(false); DrawCircle.getJPanel().setVisible(false); DrawEllipse.getJPanel().setVisible(false); DrawSolidCircle.getJPanel().setVisible(false); remoteControl.secondItemSelected(0); else if(String)rectanqleBox.getSelectedItem().equals(长方形（长宽）) nullJPanel.setVisible(false); DrawSquare.getJPanel().setVisible(false); DrawRectanqleLong.getJPanel().setVisible(false); DrawRectanqleHeight.getJPanel().setVisible(false); DrawTrianqle.getJPanel().setVisible(false); DrawRightanqleTrianqle.getJPanel().setVisible(false); DrawIsoscelesTrianqle.getJPanel().setVisible(false); DrawCircle.getJPanel().setVisible(false); DrawEllipse.getJPanel().setVisible(false); DrawSolidCircle.getJPanel().setVisible(false); remoteControl.thirdItemSelected(0); ); trianqleBox.addActionListener(new ActionListener() /事件处理 public void actionPerformed(ActionEvent event) if(String)trianqleBox.getSelectedItem().equals(一般三角形) nullJPanel.setVisible(false); DrawSquare.getJPanel().setVisible(false); DrawRectanqleLong.getJPanel().setVisible(false); DrawRectanqleHeight.getJPanel().setVisible(false); DrawTrianqle.getJPanel().setVisible(false); DrawRightanqleTrianqle.getJPanel().setVisible(false); DrawIsoscelesTrianqle.getJPanel().setVisible(false); DrawCircle.getJPanel().setVisible(false); DrawEllipse.getJPanel().setVisible(false); DrawSolidCircle.getJPanel().setVisible(false); remoteControl.firstItemSelected(1); else if(String)trianqleBox.getSelectedItem().equals(直角三角形) nullJPanel.setVisible(false); DrawSquare.getJPanel().setVisible(false); DrawRectanqleLong.getJPanel().setVisible(false); DrawRectanqleHeight.getJPanel().setVisible(false); DrawTrianqle.getJPanel().setVisible(false); DrawRightanqleTrianqle.getJPanel().setVisible(false); DrawIsoscelesTrianqle.getJPanel().setVisible(false); DrawCircle.getJPanel().setVisible(false); DrawEllipse.getJPanel().setVisible(false); DrawSolidCircle.getJPanel().setVisible(false); remoteControl.secondItemSelected(1); else if(String)trianqleBox.getSelectedItem().equals(等腰三角形) nullJPanel.setVisible(false); DrawSquare.getJPanel().setVisible(false); DrawRectanqleLong.getJPanel().setVisible(false); DrawRectanqleHeight.getJPanel().setVisible(false); DrawTrianqle.getJPanel().setVisible(false); DrawRightanqleTrianqle.getJPanel().setVisible(false); DrawIsoscelesTrianqle.getJPanel().setVisible(false); DrawCircle.getJPanel().setVisible(false); DrawEllipse.getJPanel().setVisible(false); DrawSolidCircle.getJPanel().setVisible(false); remoteControl.thirdItemSelected(1); ); circleBox.addActionListener(new ActionListener() /事件处理 public void actionPerformed(ActionEvent event) if(String)circleBox.getSelectedItem().equals(一般圆) nullJPanel.setVisible(false); DrawSquare.getJPanel().setVisible(false); DrawRectanqleLong.getJPanel().setVisible(false); DrawRectanqleHeight.getJPanel().setVisible(false); DrawTrianqle.getJPanel().setVisible(false); DrawRightanqleTrianqle.getJPanel().setVisible(false); DrawIsoscelesTrianqle.getJPanel().setVisible(false); DrawCircle.getJPanel().setVisible(false); DrawEllipse.getJPanel().setVisible(false); DrawSolidCircle.getJPanel().setVisible(false); remoteControl.firstItemSelected(2); else if(String)circleBox.getSelectedItem().equals(椭圆) nullJPanel.setVisible(false); DrawSquare.getJPanel().setVisible(false); DrawRectanqleLong.getJPanel().setVisible(false); DrawRectanqleHeight.getJPanel().setVisible(false); DrawTrianqle.getJPanel().setVisible(false); DrawRightanqleTrianqle.getJPanel().setVisible(false); DrawIsoscelesTrianqle.getJPanel().setVisible(false); DrawCircle.getJPanel().setVisible(false); DrawEllipse.getJPanel().setVisible(false); DrawSolidCircle.getJPanel().setVisible(false); remoteControl.secondItemSelected(2); else if(String)circleBox.getSelectedItem().equals(实心圆) nullJPanel.setVisible(false); DrawSquare.getJPanel().setVisible(false); DrawRectanqleLong.getJPanel().setVisible(false); DrawRectanqleHeight.getJPanel().setVisible(false); DrawTrianqle.getJPanel().setVisible(false); DrawRightanqleTrianqle.getJPanel().setVisible(false); DrawIsoscelesTrianqle.getJPanel().setVisible(false); DrawCircle.getJPanel().setVisible(false); DrawEllipse.getJPanel().setVisible(false); DrawSolidCircle.getJPanel().setVisible(false); remoteControl.thirdItemSelected(2);