设计模式-桥接模式，模板方法模式

Author: dolyw

DesignPattern/src/main/java/com/design/bridge/BlackColorImpl.java

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+package com.design.bridge;
+
+/**
+ * 黑色
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 17:05
+ */
+public class BlackColorImpl implements Color {
+    @Override
+    public void bepaint(String shape) {
+        System.out.println("黑色的" + shape);
+    }
+}

DesignPattern/src/main/java/com/design/bridge/CircleShapeImpl.java

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+package com.design.bridge;
+
+/**
+ * 圆形
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 17:05
+ */
+public class CircleShapeImpl extends Shape {
+    @Override
+    public void draw() {
+        color.bepaint("圆形");
+    }
+}

DesignPattern/src/main/java/com/design/bridge/Color.java

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+package com.design.bridge;
+
+/**
+ * 颜色接口
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 17:05
+ */
+public interface Color {
+
+    void bepaint(String shape);
+
+}

DesignPattern/src/main/java/com/design/bridge/GrayColorImpl.java

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+package com.design.bridge;
+
+/**
+ * 灰色
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 17:05
+ */
+public class GrayColorImpl implements Color {
+    @Override
+    public void bepaint(String shape) {
+        System.out.println("灰色的" + shape);
+    }
+}

DesignPattern/src/main/java/com/design/bridge/Main.java

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+package com.design.bridge;
+
+/**
+ * 桥接模式 - 在有多种可能会变化的情况下，用继承会造成类爆炸问题，扩展起来不灵活
+ * 使用一个画不同颜色的形状的小例子说明，比如可以画正方形、长方形、圆形
+ * 但是现在我们需要给这些形状进行上色，这里有三种颜色：白色、灰色、黑色
+ * 这里我们可以画出 3 * 3 = 9 种图形，一般直接的做法是使用继承，
+ * 为每种形状都提供各种颜色的版本，这样的做法不灵活，
+ * 会导致实现类几何增长，所以引出了桥接模式，根据实际需要对颜色和形状进行组合
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 17:05
+ */
+public class Main {
+
+    public static void main(String[] args) {
+        // 颜色
+        Color whiteColor = new WhiteColorImpl();
+        Color blackColor = new BlackColorImpl();
+        Color grayColor = new GrayColorImpl();
+        // 形状
+        Shape square = new SquareShapeImpl();
+        Shape rectangleShape = new RectangleShapeImpl();
+        Shape circleShape = new CircleShapeImpl();
+        // 白色的正方形
+        square.setColor(whiteColor);
+        square.draw();
+        // 灰色的正方形
+        square.setColor(grayColor);
+        square.draw();
+        // 黑色的长方形
+        rectangleShape.setColor(blackColor);
+        rectangleShape.draw();
+        // 灰色的圆形
+        circleShape.setColor(grayColor);
+        circleShape.draw();
+        // 白色的圆形
+        circleShape.setColor(whiteColor);
+        circleShape.draw();
+    }
+
+}

DesignPattern/src/main/java/com/design/bridge/RectangleShapeImpl.java

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+package com.design.bridge;
+
+/**
+ * 长方形
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 17:05
+ */
+public class RectangleShapeImpl extends Shape {
+    @Override
+    public void draw() {
+        color.bepaint("长方形");
+    }
+}

DesignPattern/src/main/java/com/design/bridge/Shape.java

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+package com.design.bridge;
+
+/**
+ * 形状抽象类
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 17:05
+ */
+public abstract class Shape {
+    protected Color color;
+
+    public void setColor(Color color) {
+        this.color = color;
+    }
+
+    public abstract void draw();
+}

DesignPattern/src/main/java/com/design/bridge/SquareShapeImpl.java

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+package com.design.bridge;
+
+/**
+ * 正方形
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 17:05
+ */
+public class SquareShapeImpl extends Shape {
+    @Override
+    public void draw() {
+        color.bepaint("正方形");
+    }
+}

DesignPattern/src/main/java/com/design/bridge/WhiteColorImpl.java

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+package com.design.bridge;
+
+/**
+ * 白色
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 17:05
+ */
+public class WhiteColorImpl implements Color {
+    @Override
+    public void bepaint(String shape) {
+        System.out.println("白色的" + shape);
+    }
+}

DesignPattern/src/main/java/com/design/templatemethod/Game.java

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+package com.design.templatemethod;
+
+/**
+ * 模板方法 - 创建一个抽象类，它的模板方法被设置为 final
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2023/2/2 10:00
+ */
+public abstract class Game {
+
+    /**
+     * 初始化
+     */
+    abstract void initialize();
+
+    /**
+     * 开始游戏
+     */
+    abstract void startPlay();
+
+    /**
+     * 结束游戏
+     */
+    abstract void endPlay();
+
+    /**
+     * 模板
+     */
+    public final void play() {
+        // 初始化游戏
+        initialize();
+
+        // 开始游戏
+        startPlay();
+
+        // 结束游戏
+        endPlay();
+    }
+}