/**
     * 創(chuàng)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.查詢(xún)訂單
        Order order = orderMapper.findById(orderId);
        // 2.利用RestTemplate發(fā)起HTTP請(qǐng)求，查詢(xún)用戶(hù)
        // 2.1.url路徑
        String url="http://localhost:8081/user/"+order.getUserId();
        // 2.2.發(fā)送HTTP請(qǐng)求，實(shí)現(xiàn)遠(yuǎn)程調(diào)用
        User user = restTemplate.getForObject(url, User.class);
        // 3.封裝user到order對(duì)象
        order.setUser(user);
        // 4.返回
        return order;
    }

<dependency>
            <!--eureka服務(wù)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 # 服務(wù)端口
spring:
  application:
    name: eurekaserver # eureka的服務(wù)名稱(chēng)
eureka:
  client:
    service-url: # eureka的地址信息
      defaultZone: http://127.0.0.1:10086/eureka

<!--eureka客戶(hù)端依賴(lài)-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

spring:
  application:
    name: userservice # eureka的服務(wù)名稱(chēng)
eureka:
  client:
    service-url: # eureka的地址信息
      defaultZone: http://127.0.0.1:10086/eureka

/**
     * 創(chuàng)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.查詢(xún)訂單
        Order order = orderMapper.findById(orderId);
        // 2.利用RestTemplate發(fā)起HTTP請(qǐng)求，查詢(xún)用戶(hù)
        // 2.1.url路徑
        // String url="http://localhost:8081/user/"+order.getUserId();
        String url="http://userservice/user/"+order.getUserId();
        // 2.2.發(fā)送HTTP請(qǐng)求，實(shí)現(xiàn)遠(yuǎn)程調(diào)用
        User user = restTemplate.getForObject(url, User.class);
        // 3.封裝user到order對(duì)象
        order.setUser(user);
        // 4.返回
        return order;
    }

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

userservice:
  ribbon:
    NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RandomRule # 負(fù)載均衡規(guī)則

ribbon:
  eager-load:
    enabled: true  # 開(kāi)啟饑餓加載
    clients:  # 指定饑餓加載的服務(wù)名稱(chēng) 這是一個(gè)集合
      - userservice

startup.cmd -m standalone

<!--nacos的管理依賴(lài)-->
            <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客戶(hù)端依賴(lài)包-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

spring:
  cloud:
    nacos:
      server-addr: localhost:8848 # nacos 服務(wù)端地址

spring:
  cloud:
    nacos:
    server-addr: localhost:8848 # nacos 服務(wù)端地址
    discovery:
      cluster-name: HZ # 配置集群名稱(chēng)，也就是機(jī)房位置 HZ杭州 SH上海

spring:
  cloud:
    nacos:
    server-addr: localhost:8848 # nacos 服務(wù)端地址
    discovery:
      cluster-name: HZ # 配置集群名稱(chēng)，也就是機(jī)房位置 HZ杭州 SH上海
      namespace: a0c14ea6-b75e-4a73-beb5-94e5f496a744 # dev 開(kāi)發(fā)環(huán)境