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+++ b/README/设计模式-v2.md
@@ -619,3 +619,169 @@ public class Main {
     }
 }
 ```
+
+## 建造者模式
+
+![image-20250201203116885](./images/设计模式-v2/image-20250201203116885.png)
+
+### 简单示例
+
+比如我们要构建一个复杂的 `Computer`（计算机）对象。我们可以定义一个 `ComputerBuilder`，它将按顺序设置计算机的 CPU、内存、硬盘等组件，最后得到一个完整的 `Computer` 对象。
+
+#### 代码示例
+
+```java
+public class CommandDemo {
+    public static void main(String[] args) {
+        ConcreteLowComputerBuilder concreteLowComputerBuilder = new ConcreteLowComputerBuilder();
+        Director director = new Director(concreteLowComputerBuilder);
+        director.constructComputer();
+        System.out.println(concreteLowComputerBuilder.getComputer());
+
+        System.out.println("\n-----------------分割线-----------------\n");
+        
+        ConcreteHighComputerBuilder concreteHighComputerBuilder = new ConcreteHighComputerBuilder();
+        director = new Director(concreteHighComputerBuilder);
+        director.constructComputer();
+        System.out.println(concreteHighComputerBuilder.getComputer());
+    }
+
+    // 构建产品接口
+    interface ComputerBuilder {
+
+        /**
+         * 构建 CPU 方法
+         */
+        void buildCPU();
+
+        /**
+         * 构建 RAM 方法
+         */
+        void buildRAM();
+
+        /**
+         * 构建 磁盘 方法
+         */
+        void buildHardDrive();
+
+        /**
+         * 返回产品
+         *
+         * @return Computer
+         */
+        Computer getComputer();
+    }
+
+    // 产品类
+    @Data
+    static class Computer {
+        private String CPU;
+        private String RAM;
+        private String hardDrive;
+    }
+
+    // 构建低端产品
+    static class ConcreteLowComputerBuilder implements ComputerBuilder {
+        private final Computer computer = new Computer();
+
+        /**
+         * 构建 CPU 方法
+         */
+        @Override
+        public void buildCPU() {
+            computer.setCPU("Low CPU");
+        }
+
+        /**
+         * 构建 RAM 方法
+         */
+        @Override
+        public void buildRAM() {
+            computer.setRAM("Low RAM");
+        }
+
+        /**
+         * 构建 磁盘 方法
+         */
+        @Override
+        public void buildHardDrive() {
+            computer.setHardDrive("Low Driver");
+        }
+
+        /**
+         * 返回产品
+         *
+         * @return Computer
+         */
+        @Override
+        public Computer getComputer() {
+            return computer;
+        }
+    }
+
+    // 构建高端产品
+    static class ConcreteHighComputerBuilder implements ComputerBuilder {
+        private final Computer computer = new Computer();
+
+        /**
+         * 构建 CPU 方法
+         */
+        @Override
+        public void buildCPU() {
+            computer.setCPU("High CPU");
+        }
+
+        /**
+         * 构建 RAM 方法
+         */
+        @Override
+        public void buildRAM() {
+            computer.setRAM("High RAM");
+        }
+
+        /**
+         * 构建 磁盘 方法
+         */
+        @Override
+        public void buildHardDrive() {
+            computer.setHardDrive("High Driver");
+        }
+
+        /**
+         * 返回产品
+         *
+         * @return Computer
+         */
+        @Override
+        public Computer getComputer() {
+            return computer;
+        }
+    }
+
+    // 构建者
+    public static class Director {
+        private final ComputerBuilder builder;
+
+        public Director(ComputerBuilder builder) {
+            this.builder = builder;
+        }
+
+        public void constructComputer() {
+            builder.buildCPU();
+            builder.buildRAM();
+            builder.buildHardDrive();
+        }
+    }
+}
+```
+
+#### 运行结果
+
+```java
+CommandDemo.Computer(CPU=Low CPU, RAM=Low RAM, hardDrive=Low Driver)
+
+-----------------分割线-----------------
+
+CommandDemo.Computer(CPU=High CPU, RAM=High RAM, hardDrive=High Driver)
+```
+
diff --git a/pattern/src/main/java/cn/bunny/pattern5/demo3/CommandDemo.java b/pattern/src/main/java/cn/bunny/pattern5/demo3/CommandDemo.java
new file mode 100644
index 0000000..dc57cdf
--- /dev/null
+++ b/pattern/src/main/java/cn/bunny/pattern5/demo3/CommandDemo.java
@@ -0,0 +1,146 @@
+package cn.bunny.pattern5.demo3;
+
+import lombok.Data;
+
+public class CommandDemo {
+    public static void main(String[] args) {
+        ConcreteLowComputerBuilder concreteLowComputerBuilder = new ConcreteLowComputerBuilder();
+        Director director = new Director(concreteLowComputerBuilder);
+        director.constructComputer();
+        System.out.println(concreteLowComputerBuilder.getComputer());
+
+        System.out.println("\n-----------------分割线-----------------\n");
+        
+        ConcreteHighComputerBuilder concreteHighComputerBuilder = new ConcreteHighComputerBuilder();
+        director = new Director(concreteHighComputerBuilder);
+        director.constructComputer();
+        System.out.println(concreteHighComputerBuilder.getComputer());
+    }
+
+    // 构建产品接口
+    interface ComputerBuilder {
+
+        /**
+         * 构建 CPU 方法
+         */
+        void buildCPU();
+
+        /**
+         * 构建 RAM 方法
+         */
+        void buildRAM();
+
+        /**
+         * 构建 磁盘 方法
+         */
+        void buildHardDrive();
+
+        /**
+         * 返回产品
+         *
+         * @return Computer
+         */
+        Computer getComputer();
+    }
+
+    // 产品类
+    @Data
+    static class Computer {
+        private String CPU;
+        private String RAM;
+        private String hardDrive;
+    }
+
+    // 构建低端产品
+    static class ConcreteLowComputerBuilder implements ComputerBuilder {
+        private final Computer computer = new Computer();
+
+        /**
+         * 构建 CPU 方法
+         */
+        @Override
+        public void buildCPU() {
+            computer.setCPU("Low CPU");
+        }
+
+        /**
+         * 构建 RAM 方法
+         */
+        @Override
+        public void buildRAM() {
+            computer.setRAM("Low RAM");
+        }
+
+        /**
+         * 构建 磁盘 方法
+         */
+        @Override
+        public void buildHardDrive() {
+            computer.setHardDrive("Low Driver");
+        }
+
+        /**
+         * 返回产品
+         *
+         * @return Computer
+         */
+        @Override
+        public Computer getComputer() {
+            return computer;
+        }
+    }
+
+    // 构建高端产品
+    static class ConcreteHighComputerBuilder implements ComputerBuilder {
+        private final Computer computer = new Computer();
+
+        /**
+         * 构建 CPU 方法
+         */
+        @Override
+        public void buildCPU() {
+            computer.setCPU("High CPU");
+        }
+
+        /**
+         * 构建 RAM 方法
+         */
+        @Override
+        public void buildRAM() {
+            computer.setRAM("High RAM");
+        }
+
+        /**
+         * 构建 磁盘 方法
+         */
+        @Override
+        public void buildHardDrive() {
+            computer.setHardDrive("High Driver");
+        }
+
+        /**
+         * 返回产品
+         *
+         * @return Computer
+         */
+        @Override
+        public Computer getComputer() {
+            return computer;
+        }
+    }
+
+    // 构建者
+    public static class Director {
+        private final ComputerBuilder builder;
+
+        public Director(ComputerBuilder builder) {
+            this.builder = builder;
+        }
+
+        public void constructComputer() {
+            builder.buildCPU();
+            builder.buildRAM();
+            builder.buildHardDrive();
+        }
+    }
+}