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2 创建工程的主类

package com.itheima;@SpringBootApplicationpublic class OrderApplication {public static void main(String[] args) {SpringApplication.run(OrderApplication.class, args);}}

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3 创建配置文件 application.yml

server:port: 8091spring:application:name: service-productdatasource:driver-class-name: com.mysql.jdbc.Driverurl: jdbc:mysql:///shop?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=trueusername: rootpassword: rootjpa:properties:hibernate:hbm2ddl:auto: updatedialect: org.hibernate.dialect.MySQL5InnoDBDialect

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4 创建 OrderDao 接口

package com.itheima.dao;public interface OrderDao extends JpaRepository {}

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5 创建 OrderService 接口和实现类

@Servicepublic class OrderServiceImpl implements OrderService {@Autowiredprivate OrderDao orderDao;@Overridepublic void save(Order order) {orderDao.save(order);}}

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6 创建 RestTemplate

@SpringBootApplicationpublic class OrderApplication {public static void main(String[] args) {SpringApplication.run(OrderApplication.class, args);}@Beanpublic RestTemplate getRestTemplate() {return new RestTemplate();}}

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7 创建 Controller

package com.itheima.controller;@RestController@Slf4jpublic class OrderController {@Autowiredprivate RestTemplate restTemplate;@Autowiredprivate OrderService orderService;//准备买1件商品@GetMapping("/order/prod/{pid}")public Order order(@PathVariable("pid") Integer pid) {log.info(">>客户下单，这时候要调用商品微服务查询商品信息");//通过restTemplate调用商品微服务Product product = restTemplate.getForObject("http://localhost:8081/product/" + pid, Product.class);log.info(">>商品信息,查询结果:" + JSON.toJSONString(product));Order order = new Order();order.setUid(1);order.setUsername("测试用户");order.setPid(product.getPid());order.setPname(product.getPname());order.setPprice(product.getPprice());order.setNumber(1);orderService.save(order);return order;}}

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7 启动工程,通过浏览器访问服务进行测试

总结

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