将一个SpringBoot项目注册为微服务，需要作如下修改。

pom.xml添加

  <!--使用SpringBoot1.5.3版本-->
   <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

<dependencies>

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

      <!--开启eureka服务发现功能-->
      <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>

        <!--开启ribbon功能-->
       <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-ribbon</artifactId>
        </dependency>

</dependencies>

<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Camden.SR7</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
</dependencyManagement>

application.yml文件加入以下配置

eureka:
  client:
    serviceUrl:
      #指定SpringCloud服务端地址
      defaultZone: http://localhost:8000/eureka/

spring:
 application:
    name: db-service  #指定服务名,服务消费者通过该服务名调用该服务

启动类中添加注册服务注解：@EnableDiscoveryClient 、@ServletComponentScan

如下所示：

@EnableDiscoveryClient   //将自己注册到服务中心
@SpringBootApplication
@ServletComponentScan
public class SpringcloudtestApplication {

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

启动项目，该项目就会被注册为一个服务。