# Sharding-JDBC 从入门到精通（9）- 综合案例（二）添加商品

Sharding-JDBC 从入门到精通（9）- 综合案例（二）添加商品

一、Sharding-JDBC 综合案例-添加商品-dao

1、在 shopping 子工程（子模块）中，创建 dao 接口类 ProductDao.java

/***   dbsharding\shopping\src\main\java\djh\it\shopping\dao\ProductDao.java**   2024-7-3 创建 dao 接口类 ProductDao.java*/
package djh.it.shopping.dao;import djh.it.shopping.entity.ProductDescript;
import djh.it.shopping.entity.ProductInfo;
import org.apache.ibatis.annotations.*;
import org.springframework.stereotype.Component;import java.util.List;
import java.util.Map;@Mapper
@Component
public interface ProductDao {//添加商品基本信息@Insert("insert into product_info(store_info_id, product_name, spec, region_code, price) " +" values(#{storeInfoId},#{productName},#{spec},#{regionCode},#{price})")@Options(useGeneratedKeys = true, keyProperty = "productInfoId", keyColumn = "product_info_id")int insertProductInfo( ProductInfo productInfo );//添加商品描述信息@Insert("insert into product_descript(product_info_id, descript, store_info_id) " +" values(#{productInfoId}, #{descript}, #{storeInfoId})")@Options(useGeneratedKeys = true, keyProperty = "id", keyColumn = "id")int insertProductDescript( ProductDescript productDescript );
}

二、Sharding-JDBC 综合案例-添加商品-service

1、在 shopping 子工程（子模块）中，创建 service 接口类 ProductService.java

/***   dbsharding\shopping\src\main\java\djh\it\shopping\service\ProductService.java**   2024-7-3 创建 service 接口类 ProductService.java*/
package djh.it.shopping.service;import djh.it.shopping.entity.ProductInfo;public interface ProductService {//添加商品public void createProduct( ProductInfo productInfo );
}

2、在 shopping 子工程（子模块）中，创建 service 实现类 ProductServiceImpl.java

/***   dbsharding\shopping\src\main\java\djh\it\shopping\service\impl\ProductServiceImpl.java**   2024-7-3 创建 service 实现类 ProductServiceImpl.java*/
package djh.it.shopping.service.impl;import djh.it.shopping.dao.ProductDao;
import djh.it.shopping.entity.ProductDescript;
import djh.it.shopping.entity.ProductInfo;
import djh.it.shopping.service.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;@Service
public class ProductServiceImpl implements ProductService {@AutowiredProductDao productDao;@Override@Transactionalpublic void createProduct( ProductInfo productInfo ) {ProductDescript productDescript = new ProductDescript();//设置商品描述信息productDescript.setDescript(productInfo.getDescript());//调用dao 向商品信息表productDao.insertProductInfo(productInfo);//将商品信息id设置到 productDescript
//        productDescript.setId(productInfo.getProductInfoId());  //errorproductDescript.setProductInfoId(productInfo.getProductInfoId());//设置店铺idproductDescript.setStoreInfoId(productInfo.getStoreInfoId());//向商品描述信息表插入数据productDao.insertProductDescript(productDescript);}
}

三、Sharding-JDBC 综合案例-添加商品-测试

1、在 shopping 子工程（子模块）中，创建测试类 ShardingTest.java

/***   dbsharding\shopping\src\test\java\djh\it\shopping\ShardingTest.java**   2024-7-3 创建 测试类 ShardingTest.java*/
package djh.it.shopping;import djh.it.shopping.entity.ProductInfo;
import djh.it.shopping.service.ProductService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;import java.math.BigDecimal;@RunWith(SpringRunner.class)
@SpringBootTest(classes = ShoppingBootstrap.class)
public class ShardingTest {@AutowiredProductService productService;@Test   //添加商品public void testCreateProduct(){ProductInfo productInfo = new ProductInfo();productInfo.setStoreInfoId(1L);  //店铺id（向 product_db_2 中插入数据）productInfo.setProductName("Java编程思想");  //商品名称productInfo.setSpec("大号");  //商品规格productInfo.setPrice(new BigDecimal(60));  //商品价格productInfo.setRegionCode("110100");  //商品产地productInfo.setDescript("《java编程思想》这本书不错！！！");  //商品描述productService.createProduct(productInfo);}
}