微服务eureka和nacos案例详解

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

@Autowired
    private RestTemplate restTemplate;
    public Order queryOrderById(Long orderId) {
        // 1.查询订单
        Order order = orderMapper.findById(orderId);
        // 2.利用RestTemplate发起HTTP请求，查询用户
        // 2.1.url路径
        String url="http://localhost:8081/user/"+order.getUserId();
        // 2.2.发送HTTP请求，实现远程调用
        User user = restTemplate.getForObject(url, User.class);
        // 3.封装user到order对象
        order.setUser(user);
        // 4.返回
        return order;
    }

<dependency>
            <!--eureka服务端-->
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifact
</dependency>

@EnableEurekaServer
@SpringBootApplication
public class EurekaApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaApplication.class,args);
    }
}

server:
  port: 10086 # 服务端口
spring:
  application:
    name: eurekaserver # eureka的服务名称
eureka:
  client:
    service-url: # eureka的地址信息
      defaultZone: http://127.0.0.1:10086/eureka

<!--eureka客户端依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

spring:
  application:
    name: userservice # eureka的服务名称
eureka:
  client:
    service-url: # eureka的地址信息
      defaultZone: http://127.0.0.1:10086/eureka

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

@Autowired
    private OrderMapper orderMapper;
    @Autowired
    private RestTemplate restTemplate;
    public Order queryOrderById(Long orderId) {
        // 1.查询订单
        Order order = orderMapper.findById(orderId);
        // 2.利用RestTemplate发起HTTP请求，查询用户
        // 2.1.url路径
        // String url="http://localhost:8081/user/"+order.getUserId();
        String url="http://userservice/user/"+order.getUserId();
        // 2.2.发送HTTP请求，实现远程调用
        User user = restTemplate.getForObject(url, User.class);
        // 3.封装user到order对象
        order.setUser(user);
        // 4.返回
        return order;
    }

@Bean
    public IRule randomRule(){
        return new RandomRule();
    }

userservice:
  ribbon:
    NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RandomRule # 负载均衡规则

ribbon:
  eager-load:
    enabled: true  # 开启饥饿加载
    clients:  # 指定饥饿加载的服务名称 这是一个集合
      - userservice

startup.cmd -m standalone

<!--nacos的管理依赖-->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.5.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

<!--nacos客户端依赖包-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

spring:
  cloud:
    nacos:
      server-addr: localhost:8848 # nacos 服务端地址

spring:
  cloud:
    nacos:
    server-addr: localhost:8848 # nacos 服务端地址
    discovery:
      cluster-name: HZ # 配置集群名称，也就是机房位置 HZ杭州 SH上海

spring:
  cloud:
    nacos:
    server-addr: localhost:8848 # nacos 服务端地址
    discovery:
      cluster-name: HZ # 配置集群名称，也就是机房位置 HZ杭州 SH上海
      namespace: a0c14ea6-b75e-4a73-beb5-94e5f496a744 # dev 开发环境