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目录
1.声明项目依赖和项目构建插件
2.完善子项目订单服务
2.1完善启动类和配置文件
2.2 业务代码
3.远程调用
3.1需求
3.2 实现
1.声明项目依赖和项目构建插件
把下面代码分别引入到两个子项目的pom.xml中.
<dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId></dependency><!--mybatis--><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId></dependency>
</dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins><resources><resource><directory>src/main/resources</directory><filtering>true</filtering><includes><include>**/**</include></includes></resource></resources>
</build>
2.完善子项目订单服务
2.1完善启动类和配置文件
启动类
@SpringBootApplication
public class OrderApplication {public static void main(String[] args) {SpringApplication.run(OrderApplication.class,args);}
}
配置文件
在resource文件夹中建立,application.yml 文件.
server:port: 8080
spring:datasource:url: jdbc:mysql://127.0.0.1:3306/cloud_order?characterEncoding=utf8&useSSL=falseusername:password:driver-class-name: com.mysql.cj.jdbc.Driver
mybatis:configuration: # 配置打印 MyBatis 执行的 SQLlog-impl: org.apache.ibatis.logging.stdout.StdOutImplmap-underscore-to-camel-case: true #自动驼峰转换
2.2 业务代码
订单服务：根据订单id，获取订单详情..
1. 先搭架子
2. 实体类.
子项目pom并没有引入lombok，但依然可以使用。@Date
@Data
public class OrderInfo {private Integer orderId;private Integer userId;private Integer productId;private Integer num;private Integer price; //随便了private Date createTime;private Date updateTime;
}3.Controller
import com.dome.order.model.OrderInfo;
import com.dome.order.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
@RequestMapping("/order")
public class OrderController {@Autowiredprivate OrderService orderService;@RequestMapping("/{orderId}")public OrderInfo getOrderById(@PathVariable("orderId") Integer orderId) { //从url中拿参数return orderService.selectOrderById(orderId);}
}4.Service
import com.dome.order.mapper.OrderMapper;
import com.dome.order.model.OrderInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;@Service
public class OrderService {@Autowiredprivate OrderMapper orderMapper;public OrderInfo selectOrderById(Integer orderId) {return orderMapper.selectOrderById(orderId);}
}5.Mapper
import com.dome.order.model.OrderInfo;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;@Mapper
public interface OrderMapper {@Select("select * from order_detail where id = #{orderId}")OrderInfo selectOrderById(Integer orderId);
}
测试
启动OrderApplication类.
访问url:http://127.0.0.1:8080/order/1.
完善子项目商品服务，跟上诉过程一样，只需要修改端口号就可以了，因为后⾯需要多个服务⼀起启动,所以要设置为不同的端⼝号。（这里就不在展示了）
3.远程调用
3.1需求
根据订单查询订单信息时,根据订单⾥产品ID,获取产品的详细信息.
3.2 实现
实现思路: order-service服务向product-service服务发送⼀个http请求,把得到的返回结果,和订单结果融合在⼀起,返回给调⽤⽅.
实现⽅式: 采⽤ Spring 提供的 RestTemplate.
实现http请求的⽅式,有很多,可参考:https://zhuanlan.zhihu.com/p/670101467
准备工作
把product实体类添加到order-service中的mode中并在OrderInfo中添加product属性.
1. 定义RestTemplate. （第三方对象需要使用@Bean注解）
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;@Configuration
public class BeanConfig {@Beanpublic RestTemplate restTemplate() {return new RestTemplate();}
}
2.修改order-service中的OrderService
@Service
public class OrderService {@Autowiredprivate OrderMapper orderMapper;@Autowiredprivate RestTemplate restTemplate;public OrderInfo selectOrderById(Integer orderId) {OrderInfo orderInfo = orderMapper.selectOrderById(orderId);String url = "http://127.0.0.1:9090/product/" + orderInfo.getProductId();ProductInfo productInfo = restTemplate.getForObject(url, ProductInfo.class);orderInfo.setProductInfo(productInfo);return orderInfo;}
}3. 测试.
例 url: http://127.0.0.1:8080/order/1
