feat: 🍎 工厂模式

src/main/java/cc/niushuai/demo/designpattern/creatormodel/factory/_01/GoodsFactory.java

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+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cc.niushuai.demo.designpattern.creatormodel.factory._01;
+
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.service.ClothService;
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.service.FoodService;
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.service.FruitService;
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * goods factory
+ *
+ * @author niushuai233
+ * @date 2023/12/20 9:28
+ * @since 0.0.1
+ */
+@Slf4j
+public class GoodsFactory {
+
+    public IGoodsService getGoodsService(Integer goodsType) {
+
+        switch (goodsType) {
+            case 1:
+                return new ClothService();
+            case 2:
+                return new FoodService();
+            case 3:
+                return new FruitService();
+        }
+        throw new RuntimeException("Bad goodsType value " + goodsType);
+    }
+
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/factory/_01/IGoodsService.java

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+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cc.niushuai.demo.designpattern.creatormodel.factory._01;
+
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.entity.GoodsReq;
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.entity.GoodsResponse;
+
+/**
+ * goods service interface
+ *
+ * @author niushuai233
+ * @date 2023/12/20 9:51
+ * @since 0.0.1
+ */
+public interface IGoodsService {
+
+    GoodsResponse sell(GoodsReq goodsReq);
+
+    GoodsResponse buy(GoodsReq goodsReq);
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/factory/_01/entity/GoodsReq.java

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+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cc.niushuai.demo.designpattern.creatormodel.factory._01.entity;
+
+import lombok.Data;
+
+import java.math.BigDecimal;
+
+/**
+ * 商品 request body
+ *
+ * @author niushuai233
+ * @date 2023/12/20 9:53
+ * @since 0.0.1
+ */
+@Data
+public class GoodsReq {
+
+    private String id;
+    private String name;
+    private Integer goodsType;
+    private BigDecimal price;
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/factory/_01/entity/GoodsResponse.java

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+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cc.niushuai.demo.designpattern.creatormodel.factory._01.entity;
+
+import lombok.Data;
+
+/**
+ * 商品 response body
+ *
+ * @author niushuai233
+ * @date 2023/12/20 9:55
+ * @since 0.0.1
+ */
+@Data
+public class GoodsResponse {
+
+    private Integer code;
+
+    private String message;
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/factory/_01/service/ClothService.java

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+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cc.niushuai.demo.designpattern.creatormodel.factory._01.service;
+
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.IGoodsService;
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.entity.GoodsReq;
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.entity.GoodsResponse;
+import cn.hutool.core.util.StrUtil;
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * 衣服品类
+ *
+ * @author niushuai233
+ * @date 2023/12/20 9:49
+ * @since 0.0.1
+ */
+@Slf4j
+public class ClothService implements IGoodsService {
+    @Override
+    public GoodsResponse sell(GoodsReq goodsReq) {
+        GoodsResponse response = new GoodsResponse();
+        response.setCode(200);
+        response.setMessage(StrUtil.format("之前买的一件{}衣服, 商品编号: {},不满意,又给卖了, 卖了￥{}", goodsReq.getName(), goodsReq.getId(), goodsReq.getPrice()));
+        return response;
+    }
+
+    @Override
+    public GoodsResponse buy(GoodsReq goodsReq) {
+        GoodsResponse response = new GoodsResponse();
+        response.setCode(200);
+        response.setMessage(StrUtil.format("使用￥{} 买了一件{}衣服, 商品编号: {}", goodsReq.getPrice(), goodsReq.getName(), goodsReq.getId()));
+        return response;
+    }
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/factory/_01/service/FoodService.java

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+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cc.niushuai.demo.designpattern.creatormodel.factory._01.service;
+
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.IGoodsService;
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.entity.GoodsReq;
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.entity.GoodsResponse;
+import cn.hutool.core.util.StrUtil;
+
+/**
+ * 食物品类
+ *
+ * @author niushuai233
+ * @date 2023/12/20 9:49
+ * @since 0.0.1
+ */
+public class FoodService implements IGoodsService {
+    @Override
+    public GoodsResponse sell(GoodsReq goodsReq) {
+        GoodsResponse response = new GoodsResponse();
+        response.setCode(200);
+        response.setMessage(StrUtil.format("之前买的一件{}食物, 商品编号: {},不满意,还没卖呢都吃完了", goodsReq.getName(), goodsReq.getId(), goodsReq.getPrice()));
+        return response;
+    }
+
+    @Override
+    public GoodsResponse buy(GoodsReq goodsReq) {
+        GoodsResponse response = new GoodsResponse();
+        response.setCode(200);
+        response.setMessage(StrUtil.format("使用￥{} 买了一件{}食物, 商品编号: {}", goodsReq.getPrice(), goodsReq.getName(), goodsReq.getId()));
+        return response;
+    }
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/factory/_01/service/FruitService.java

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+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cc.niushuai.demo.designpattern.creatormodel.factory._01.service;
+
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.IGoodsService;
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.entity.GoodsReq;
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.entity.GoodsResponse;
+import cn.hutool.core.util.StrUtil;
+
+/**
+ * 水果品类
+ *
+ * @author niushuai233
+ * @date 2023/12/20 9:51
+ * @since 0.0.1
+ */
+public class FruitService implements IGoodsService {
+    @Override
+    public GoodsResponse sell(GoodsReq goodsReq) {
+        GoodsResponse response = new GoodsResponse();
+        response.setCode(200);
+        response.setMessage(StrUtil.format("之前买的一件{}水果, 商品编号: {},不满意, 卖不出去了...", goodsReq.getName(), goodsReq.getId()));
+        return response;
+    }
+
+    @Override
+    public GoodsResponse buy(GoodsReq goodsReq) {
+        GoodsResponse response = new GoodsResponse();
+        response.setCode(200);
+        response.setMessage(StrUtil.format("使用￥{} 买了一件{}水果, 商品编号: {}", goodsReq.getPrice(), goodsReq.getName(), goodsReq.getId()));
+        return response;
+    }
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/factory/package-info.java

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+/**
+ * 工厂模式
+ *
+ * @author niushuai233
+ * @date 2023/12/20 11:41
+ * @since 0.0.1
+ */
+package cc.niushuai.demo.designpattern.creatormodel.factory;

src/test/java/cc/niushuai/demo/designpattern/creatormodel/factory/_01/GoodsFactoryTest.java

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+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cc.niushuai.demo.designpattern.creatormodel.factory._01;
+
+import cc.niushuai.demo.designpattern.creatormodel.factory._01.entity.GoodsReq;
+import cn.hutool.core.util.IdUtil;
+import cn.hutool.core.util.RandomUtil;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+
+/**
+ * TODO
+ *
+ * @author niushuai233
+ * @date 2023/12/20 13:55
+ * @since 0.0.1
+ */
+@Slf4j
+public class GoodsFactoryTest {
+
+    @Test
+    public void testGoodsFactory() {
+
+        GoodsReq clothReq = new GoodsReq();
+        clothReq.setGoodsType(1);
+        clothReq.setName("皮草大衣");
+        clothReq.setPrice(RandomUtil.randomBigDecimal());
+        clothReq.setId(IdUtil.nanoId());
+        IGoodsService clothService = new GoodsFactory().getGoodsService(clothReq.getGoodsType());
+        log.info("{}", clothService.buy(clothReq));
+        log.info("{}", clothService.sell(clothReq));
+
+        GoodsReq foodReq = new GoodsReq();
+        foodReq.setGoodsType(2);
+        foodReq.setName("面包");
+        foodReq.setPrice(RandomUtil.randomBigDecimal());
+        foodReq.setId(IdUtil.nanoId());
+        IGoodsService foodService = new GoodsFactory().getGoodsService(foodReq.getGoodsType());
+        log.info("{}", foodService.buy(foodReq));
+        log.info("{}", foodService.sell(foodReq));
+
+    }
+}