Eureka_Java

Eureka

一.搭建Eureka服务步骤 1.创建Eureka项目并导入依赖


    org.springframework.cloud
    spring-cloud-starter-netflix-eureka-server

2.配置yml文件

server:
  port: 10086 #端口
spring:
  application:
    name: eurekaserver #服务名称
eureka:
  client:
    service-url: #eureka的地址信息
      defaultZone: http://127.0.0.1:10086/eureka
    fetch-registry: false
    register-with-eureka: false

二.Eureka注册中心 1.在服务项目(user-service)和要拉取该接口的项目(order-service)中都引入eureka依赖


        
            org.springframework.cloud
            spring-cloud-starter-netflix-eureka-client

2.配置yml文件

spring:
  application:
    name: orderservice #服务名称
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10086/eureka/

三.拉取服务接口

1.首先在OrderApplication中创建RestTemplate,并注入SpringBoot容器

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

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

    @Autowired
    private RestTemplate restTemplate;
    
    
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

2.在Service层进行代码更改

@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);

        //2.查询用RestTemplate查询用户
        String url = "http://userservice/user/"+order.getUserId();
        //restTemplate帮助两个服务之间发送http请求
        User user = restTemplate.getForObject(url, User.class);

        //3.封装User
        order.setUser(user);

        // 4.返回
        return order;
    }
}

Eureka

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