feat: 中介者模式

README/设计模式-v2.md

@@ -2328,7 +2328,145 @@ public class Memo {
 
 ## 中介者模式---行为型
 
----
+![image-20250204184241160](./images/设计模式-v2/image-20250204184241160.png)
+
+需要角色：抽象中介者、具体中介者、抽象同事类、具体同事类
+
+### 简单示例
+
+#### 代码示例
+
+```java
+public class Behavior {
+    public static void main(String[] args) {
+        // 创建邮局
+        PostOfficeImpl postOffice = new PostOfficeImpl();
+
+        // 创建收信人和接收人
+        Me me = new Me(postOffice, "在地球南边");
+        You you = new You(postOffice, "在地球北边");
+
+        // 到邮局建立联系
+        postOffice.addPeople(me);
+        postOffice.addPeople(you);
+
+        // 我：
+        me.sendLetter("我的消息", "You");
+        System.out.println("---------------分隔线---------------");
+
+        // 你：
+        you.sendLetter("你的回信", "You");
+        System.out.println("---------------分隔线---------------");
+
+        // 我：
+        me.sendLetter("哈哈哈哈哈哈哈哈哈", "You");
+    }
+
+    // 抽象中介者
+    interface PostOffice {
+
+        /**
+         * 送信
+         */
+        void deliverLetter(String letter, String receiver);
+
+        /**
+         * 添加人
+         */
+        void addPeople(People people);
+    }
+
+    @Data
+    static class PostOfficeImpl implements PostOffice {
+        private final Map<String, People> peopleMap = new HashMap<>();
+
+        /**
+         * 送信
+         */
+        @Override
+        public void deliverLetter(String letter, String receiver) {
+            System.out.println("=>收信：邮局收到要寄的信");
+
+            People people = peopleMap.get(receiver);
+
+            System.out.println("=>送信：拿出地址查询收件人地址是：" + people.getAddress() + "，送信");
+            System.out.println("=>收信人看信：");
+
+            people.receiveLetter(letter);
+        }
+
+        /**
+         * 添加人
+         */
+        @Override
+        public void addPeople(People people) {
+            peopleMap.put(people.getClass().getSimpleName(), people);
+        }
+    }
+
+
+    @Getter
+    static class People {
+        private final String address;
+        protected PostOffice postOffice;
+
+        public People(PostOffice postOffice, String address) {
+            this.postOffice = postOffice;
+            this.address = address;
+        }
+
+        /**
+         * 收到信
+         *
+         * @param letter 信的内容
+         */
+        public void receiveLetter(String letter) {
+            System.out.println(letter);
+        }
+
+        /**
+         * 发送信
+         *
+         * @param letter   信内容
+         * @param receiver 收件人
+         */
+        public void sendLetter(String letter, String receiver) {
+            postOffice.deliverLetter(letter, receiver);
+        }
+    }
+
+    static class Me extends People {
+        public Me(PostOffice postOffice, String address) {
+            super(postOffice, address);
+        }
+    }
+
+    static class You extends People {
+        public You(PostOffice postOffice, String address) {
+            super(postOffice, address);
+        }
+    }
+}
+```
+
+#### 运行结果：
+
+```java
+=>收信：邮局收到要寄的信
+=>送信：拿出地址查询收件人地址是：在地球北边，送信
+=>收信人看信：
+我的消息
+---------------分隔线---------------
+=>收信：邮局收到要寄的信
+=>送信：拿出地址查询收件人地址是：在地球北边，送信
+=>收信人看信：
+你的回信
+---------------分隔线---------------
+=>收信：邮局收到要寄的信
+=>送信：拿出地址查询收件人地址是：在地球北边，送信
+=>收信人看信：
+哈哈哈哈哈哈哈哈哈
+```
 
 ## 迭代器模式---行为型
 

pattern/src/main/java/cn/bunny/pattern16/Behavior.java

@@ -0,0 +1,118 @@
+package cn.bunny.pattern16;
+
+import lombok.Data;
+import lombok.Getter;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Behavior {
+    public static void main(String[] args) {
+        // 创建邮局
+        PostOfficeImpl postOffice = new PostOfficeImpl();
+
+        // 创建收信人和接收人
+        Me me = new Me(postOffice, "在地球南边");
+        You you = new You(postOffice, "在地球北边");
+
+        // 到邮局建立联系
+        postOffice.addPeople(me);
+        postOffice.addPeople(you);
+
+        // 我：
+        me.sendLetter("我的消息", "You");
+        System.out.println("---------------分隔线---------------");
+
+        // 你：
+        you.sendLetter("你的回信", "You");
+        System.out.println("---------------分隔线---------------");
+
+        // 我：
+        me.sendLetter("哈哈哈哈哈哈哈哈哈", "You");
+    }
+
+    // 抽象中介者
+    interface PostOffice {
+
+        /**
+         * 送信
+         */
+        void deliverLetter(String letter, String receiver);
+
+        /**
+         * 添加人
+         */
+        void addPeople(People people);
+    }
+
+    @Data
+    static class PostOfficeImpl implements PostOffice {
+        private final Map<String, People> peopleMap = new HashMap<>();
+
+        /**
+         * 送信
+         */
+        @Override
+        public void deliverLetter(String letter, String receiver) {
+            System.out.println("=>收信：邮局收到要寄的信");
+
+            People people = peopleMap.get(receiver);
+
+            System.out.println("=>送信：拿出地址查询收件人地址是：" + people.getAddress() + "，送信");
+            System.out.println("=>收信人看信：");
+
+            people.receiveLetter(letter);
+        }
+
+        /**
+         * 添加人
+         */
+        @Override
+        public void addPeople(People people) {
+            peopleMap.put(people.getClass().getSimpleName(), people);
+        }
+    }
+
+
+    @Getter
+    static class People {
+        private final String address;
+        protected PostOffice postOffice;
+
+        public People(PostOffice postOffice, String address) {
+            this.postOffice = postOffice;
+            this.address = address;
+        }
+
+        /**
+         * 收到信
+         *
+         * @param letter 信的内容
+         */
+        public void receiveLetter(String letter) {
+            System.out.println(letter);
+        }
+
+        /**
+         * 发送信
+         *
+         * @param letter   信内容
+         * @param receiver 收件人
+         */
+        public void sendLetter(String letter, String receiver) {
+            postOffice.deliverLetter(letter, receiver);
+        }
+    }
+
+    static class Me extends People {
+        public Me(PostOffice postOffice, String address) {
+            super(postOffice, address);
+        }
+    }
+
+    static class You extends People {
+        public You(PostOffice postOffice, String address) {
+            super(postOffice, address);
+        }
+    }
+}