增加工厂模式（简单工厂模式）

.idea/workspace.xml

@@ -2,18 +2,19 @@
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-      <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/po/AndExpression.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/materials/po/AndExpression.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/po/Expression.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/materials/po/Expression.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/po/InterpreterMain.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/materials/InterpreterMain.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/po/OrExpression.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/materials/po/OrExpression.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/po/TerminalExpression.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/materials/po/TerminalExpression.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/InterpreterPattern/InterpreterMain.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/InterpreterPattern/po/AndExpression.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/InterpreterPattern/po/Expression.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/InterpreterPattern/po/OrExpression.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/InterpreterPattern/po/TerminalExpression.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/PatternApplication.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/StrategyPattern/Context.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/StrategyPattern/StrategyMain.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/StrategyPattern/po/OperationA.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/StrategyPattern/po/OperationB.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/StrategyPattern/po/Strategy.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/com/pattern/FactoryPattern/SimpleFactory/package-info.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/FactoryPattern/SimpleFactory/package-info.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/com/pattern/PatternApplication.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/PatternApplication.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/po/Context.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/materials/po/Context.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/po/OperationA.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/materials/po/OperationA.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/po/OperationB.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/materials/po/OperationB.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/po/Strategy.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/materials/po/Strategy.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/po/StrategyMain.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/pattern/StrategyPattern/materials/StrategyMain.java" afterDir="false" />
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@@ -24,8 +25,8 @@
     <option name="RECENT_TEMPLATES">
       <list>
         <option value="Interface" />
-        <option value="Class" />
         <option value="package-info" />
+        <option value="Class" />
       </list>
     </option>
   </component>
@@ -98,15 +99,19 @@
   </component>
   <component name="PropertiesComponent">
     <property name="WebServerToolWindowFactoryState" value="false" />
-    <property name="last_opened_file_path" value="$PROJECT_DIR$/src/com/pattern/InterpreterPattern/examples" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$/src/com/pattern/FactoryPattern/AbstractFactory" />
     <property name="vue.rearranger.settings.migration" value="true" />
   </component>
   <component name="RecentsManager">
     <key name="CopyFile.RECENT_KEYS">
+      <recent name="E:\chen\patterns\src\com\pattern\FactoryPattern\AbstractFactory" />
+      <recent name="E:\chen\patterns\src\com\pattern\FactoryPattern\FunctionFactory" />
+      <recent name="E:\chen\patterns\src\com\pattern\FactoryPattern\SimpleFactory\examples" />
       <recent name="E:\chen\patterns\src\com\pattern\InterpreterPattern\examples" />
       <recent name="E:\chen\patterns\src\com\chen\StrategyPattern" />
     </key>
     <key name="CopyClassDialog.RECENTS_KEY">
+      <recent name="com.pattern.FactoryPattern.SimpleFactory" />
       <recent name="com.chen.StrategyPattern.po" />
       <recent name="com.company.InterpreterPattern" />
     </key>
@@ -140,7 +145,7 @@
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       <workItem from="1634087918450" duration="3646000" />
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+      <workItem from="1634093719115" duration="8837000" />
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       <created>1634096220780</created>

src/com/pattern/FactoryPattern/SimpleFactory/materials/SimpleFactoryMain.java

+package com.pattern.FactoryPattern.SimpleFactory.materials;
+
+import com.pattern.FactoryPattern.SimpleFactory.materials.factory.CoffeeFactory;
+import com.pattern.FactoryPattern.SimpleFactory.materials.po.Coffee;
+
+/**
+ * 主方法
+ *
+ * @author lx
+ * @date 2021/10/13 14:34
+ **/
+public class SimpleFactoryMain {
+
+    public void main() {
+        Coffee instance = new CoffeeFactory().createInstance("Americano");
+        System.err.println("老板来一杯".concat(instance.findName()));
+    }
+}

src/com/pattern/FactoryPattern/SimpleFactory/materials/factory/CoffeeFactory.java

+package com.pattern.FactoryPattern.SimpleFactory.materials.factory;
+
+import com.pattern.FactoryPattern.SimpleFactory.materials.po.Americano;
+import com.pattern.FactoryPattern.SimpleFactory.materials.po.Cappuccino;
+import com.pattern.FactoryPattern.SimpleFactory.materials.po.Coffee;
+import com.sun.applet2.AppletParameters;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 工厂
+ *
+ * @author lx
+ * @date 2021/10/13 14:17
+ **/
+public class CoffeeFactory {
+    private static final Map<String, Coffee> COFFEE_MAP = new HashMap<>(10);
+
+    static {
+        COFFEE_MAP.put("Cappuccino", new Cappuccino());
+        COFFEE_MAP.put("Americano", new Americano());
+    }
+
+    public Coffee createInstance(String name) {
+        return COFFEE_MAP.get(name);
+    }
+}

src/com/pattern/FactoryPattern/SimpleFactory/materials/po/Americano.java

+package com.pattern.FactoryPattern.SimpleFactory.materials.po;
+
+/**
+ * 美式
+ *
+ * @author lx
+ * @date 2021/10/13 14:15
+ **/
+public class Americano extends Coffee {
+    /**
+     * 获取名称
+     *
+     * @return 名称
+     */
+    @Override
+    public String findName() {
+        return "美式";
+    }
+}

src/com/pattern/FactoryPattern/SimpleFactory/materials/po/Cappuccino.java

+package com.pattern.FactoryPattern.SimpleFactory.materials.po;
+
+/**
+ * 卡布奇诺
+ *
+ * @author lx
+ * @date 2021/10/13 14:16
+ **/
+public class Cappuccino extends Coffee {
+    /**
+     * 获取名称
+     *
+     * @return 名称
+     */
+    @Override
+    public String findName() {
+        return "卡布奇诺";
+    }
+}

src/com/pattern/FactoryPattern/SimpleFactory/materials/po/Coffee.java

+package com.pattern.FactoryPattern.SimpleFactory.materials.po;
+
+/**
+ * 咖啡
+ * 可以做成接口或者抽象类
+ *
+ * @author lx
+ * @date 2021/10/13 14:13
+ **/
+public abstract class Coffee {
+    /**
+     * 获取名称
+     *
+     * @return 名称
+     */
+    public abstract String findName();
+}

src/com/pattern/FactoryPattern/SimpleFactory/package-info.java

@@ -3,5 +3,15 @@
  */
 package com.pattern.FactoryPattern.SimpleFactory;
 /*
+说明：
+ * 属于创建型模式，又叫做静态工厂方法模式，不属于23种GOF设计模式之一。
+ * 是由一个工厂对象决定创建出哪一种产品类的实例。
+ * 实质是由一个工厂类根据传入的参数，动态决定应该创建哪一个产品类（这些产品类继承自一个父类或接口）的实例。
+作用：
+ * 将“类实例化的操作”与“使用对象的操作”分开，让使用者不用知道具体参数就可以实例化出所需要的“产品”类，从而避免了在客户端代码中显式指定，实现了解耦。
+缺点：
+ * 违背“开放 - 关闭原则”，一旦添加新产品就不得不修改工厂类的逻辑，这样就会造成工厂逻辑过于复杂。
+理解性描述：
+ * 一个抽象产品类，可以派生出多个具体产品类。一个具体工厂类，通过往此工厂的static方法中传入不同参数，产出不同的具体产品类实例。
  *
  */

src/com/pattern/FactoryPattern/package-info.java

+/**
+ * 工厂模式
+ */
+package com.pattern.FactoryPattern;
+/*
+ * 工厂模式大体分为简单工厂、工厂方法、抽象工厂等三种模式。
+ * 工厂方法模式也可称为工厂模式，与抽象模式都是属于GOF23种设计模式中的一员。
+ * 可以大概理解为：简单工厂进阶变成了工厂方法，然后再进阶成了抽象工厂。
+ * 难度逐步增加，也越来越抽象。下面按先易到难逐个分析。
+ */

src/com/pattern/PatternApplication.java

 package com.pattern;
 
+import com.pattern.FactoryPattern.SimpleFactory.materials.SimpleFactoryMain;
 import com.pattern.StrategyPattern.materials.StrategyMain;
 
 /**
@@ -13,8 +14,12 @@ public class PatternApplication {
         //new InterpreterMain().main();
 
         //策略模式
-        new StrategyMain().main();
+        //new StrategyMain().main();
 
+        //工厂模式 -- 简单工厂
+        new SimpleFactoryMain().main();
+        //工厂模式 -- 方法工厂
+        //工厂模式 -- 抽象工厂
     }
 
 }