P8 服务拆分-服务远程调用

1.在OrderApplication中注册RestRemplate对象

@MapperScan("cn.itcast.order.mapper")
@SpringBootApplication
public class OrderApplication {

    public static void main(String[] args) {
        SpringApplication.run(OrderApplication.class, args);
    }


    /**
     * 创建RestTemplate并注入Spring容器
     * @return
     */
    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

2.orderService向userService发送请求，获取用户信息

@Service
public class OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private RestTemplate restTemplate;

    public Order queryOrderById(Long orderId) {
        // 1.查询订单
        Order order = orderMapper.findById(orderId);
        String url="http://localhost:8081/user/"+order.getUserId();
        User user = restTemplate.getForObject(url, User.class);
        order.setUser(user);
        // 4.返回
        return order;
    }
}