设计模式练习（15）——中介者模式

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中介者模式

一、题目：

某软件公司需要开发一套图形用户界面类库，该类库包含若干个预定义的窗格对象，例如TextPane，ListPane，GraphicPane，窗口之间不允许直接调用，具有该类库的应用由一个包含一组窗格的窗口（Window）组成，窗口需要协调窗格之间的行为，采用中介者模式收集系统
（1）绘制中介者模式结构视图
（2）给出实例类图并实现代码。

二、所用模式结构视图：

这里写图片描述

三、实例类图：

这里写图片描述

四、实例实现代码：

(因为区分，所以在类的前面加了Gj19)

抽象中介者 -窗口

package gjMediatorPattern;/** * 抽象中介者 -窗口 * @author gongjian * */public abstract class Gj19Window {    public abstract void doSomeThing(Gj19Pane pane,String order);}

具体中介者

package gjMediatorPattern;/** * 具体中介者  * @author gongjian */public class Gj19ConcreteWindow extends Gj19Window{    private Gj19GraphicPane graphicPane;private Gj19ListPane listPane;    private Gj19TextPane textPane;    public Gj19GraphicPane getGraphicPane() {        return graphicPane;    }    public void setGraphicPane(Gj19GraphicPane graphicPane) {        this.graphicPane = graphicPane;    }    public Gj19ListPane getListPane() {        return listPane;    }    public void setListPane(Gj19ListPane listPane) {        this.listPane = listPane;    }    public Gj19TextPane getTextPane() {        return textPane;    }    public void setTextPane(Gj19TextPane textPane) {        this.textPane = textPane;    }    public Gj19ConcreteWindow(Gj19GraphicPane graphicPane,            Gj19ListPane listPane,Gj19TextPane textPane) {        this.graphicPane = graphicPane;        this.listPane = listPane;        this.textPane = textPane;    }    @Override    public void doSomeThing(Gj19Pane pane, String order) {        pane.update(order);    }}

抽象同事类-窗口格

package gjMediatorPattern;/** * 抽象同事类-窗口格 *  * @author gongjian * */public abstract class Gj19Pane {    private Gj19Window window;    public Gj19Window getWindow() {        return window;    }    public void setWindow(Gj19Window window) {        this.window = window;    }    public abstract void update(String order);}

具体同事类

package gjMediatorPattern;/** * 具体同事类 * @author gong * */public class Gj19TextPane extends Gj19Pane{    @Override    public void update(String order) {        System.out.println("TextPane接收到指令"+order);    }}

具体同事类

package gjMediatorPattern;/** * 具体同事类 * @author gong * */public class Gj19GraphicPane extends Gj19Pane{    @Override    public void update(String order) {        System.out.println("GraphicPane接收到指令"+order);    }}

具体同事类

package gjMediatorPattern;/** * 具体同事类 * @author gong * */public class Gj19ListPane extends Gj19Pane{    @Override    public void update(String order) {        System.out.println("ListPane接收到指令"+order);    }}

中介者模式客户端

package gjMediatorPattern;/** * 中介者模式客户端 * @author gong * */public class Client {    public static void main(String[] args) {        Gj19ListPane gj19ListPane =new Gj19ListPane();        Gj19TextPane gj19TextPane = new Gj19TextPane();        Gj19GraphicPane gj19GraphicPane = new Gj19GraphicPane();        Gj19ConcreteWindow concreteWindow = new Gj19ConcreteWindow(gj19GraphicPane,gj19ListPane, gj19TextPane);        System.out.println("============系统发出请求===============");        concreteWindow.doSomeThing(gj19GraphicPane, "图像放大1.2倍");        concreteWindow.doSomeThing(gj19TextPane, "文本缩小到原来的0.8倍");        concreteWindow.doSomeThing(gj19ListPane, "列表左移10px");        System.out.println("=============系统结束===================");    }}

五、运行结果：

这里写图片描述

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