主依赖

<groupId>com.lh</groupId>
<artifactId>mypinyougou</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<name>mypinyougou</name>
<description>Demo project for Spring Boot</description>

<modules>
    <module>manager-ui</module>
    <module>manager-server</module>
    <module>pinyougou-common</module>
    <module>eureka-server</module>
</modules>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.5.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Finchley.SR1</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

eureka-server依赖

<groupId>com.lh</groupId>
<artifactId>eureka-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>eureka-server</name>
<description>Demo project for Spring Boot</description>
<parent>
    <groupId>com.lh</groupId>
    <artifactId>mypinyougou</artifactId>
    <version>1.0-SNAPSHOT</version>
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>
</dependencies>

eureka-server application.yml

spring:
  application:
    name: manager-server #服务名称
server:
  port: 9002 #启动端口号
eureka:
  client:
    register-with-eureka: true #是否注册到eureka服务器
    fetch-registry: true #是否可检索
    service-url:
      defaultZone: http://127.0.0.1:9001/eureka/ #服务中心

eureka-server代码

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

manager-ui依赖

    <groupId>com.lh</groupId>
<artifactId>manager-ui</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>manager-ui</name>
<description>Demo project for Spring Boot</description>
<parent>
    <groupId>com.lh</groupId>
    <artifactId>mypinyougou</artifactId>
    <version>1.0-SNAPSHOT</version>
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-openfeign</artifactId>
    </dependency>
    <dependency>
        <groupId>com.pinyougou</groupId>
        <artifactId>pinyougou-common</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>
</dependencies>

manager-ui的application.yml

spring:
  application:
    name: manager-ui #服务名称
server:
  port: 9003 #启动端口号
eureka:
  client:
    register-with-eureka: true #是否注册到eureka服务器
    fetch-registry: true #是否可检索
    service-url:
      defaultZone: http://127.0.0.1:9001/eureka/ #服务中心

manager-ui的启动方法

@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients // 调用服务提供方时启用负载均衡
public class ManagerUiApplication {
    public static void main(String[] args) {
    SpringApplication.run(ManagerUiApplication.class, args);
  }
}

注意 :This will cause @Autowired to not work because there isn’t exactly one bean, or one marked as primary. To work around this, Spring Cloud Netflix marks all Feign instances as @Primary如下：

 @FeignClient(name = "manager-server", primary = false)

其他资源参考:
springcloud
https://blog.csdn.net/qq_42606051/article/details/81776303