13,feign繼承特性

在使用聲明式feign客戶端工具的時候，因爲書寫的方式代碼可能會產生重複，可以使用feign客戶端集成方式減少代碼。

創建springcloud-2.0-parent
Maven依賴信息

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </parent>
    <!-- 管理依賴 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.M7</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <!-- SpringBoot整合Web組件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- SpringBoot整合eureka客戶端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!-- SpringBoot整合fegnin客戶端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

    </dependencies>
    <!-- 注意： 這裏必須要添加， 否者各種依賴有問題 -->
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

創建springcloud-2.0-api
創建springcloud-2.0-member-api
創建springcloud-2.0-order-api
創建springcloud-2.0-member
application.yml

###服務啓動端口號
server:
  port: 8000
###服務名稱(服務註冊到eureka名稱)  
spring:
    application:
        name: app-itmayiedu-member
###服務註冊到eureka地址
eureka:
  client:
    service-url:
           defaultZone: http://localhost:8100/eureka

           
###因爲該應用爲註冊中心，不會註冊自己
    register-with-eureka: true
###是否需要從eureka上獲取註冊信息
    fetch-registry: true

創建springcloud-2.0-order
application.yml

###服務啓動端口號
server:
  port: 8001
###服務名稱(服務註冊到eureka名稱)  
spring:
    application:
        name: app-itmayiedu-order
###服務註冊到eureka地址
eureka:
  client:
    service-url:
           defaultZone: http://localhost:8100/eureka

           
###因爲該應用爲註冊中心，不會註冊自己
    register-with-eureka: true
###是否需要從eureka上獲取註冊信息
    fetch-registry: true