應該重構接口信息(重點)
toov5-parent 存放共同依賴信息
toov5-api api的只有接口沒有實現
toov5-api-member
toov5-api-order
too5-member-impl api接口的實現
toov5-order-impl
1、 創建 parent的 pom工程
2、 點擊parent創建maven model 的 service pom
3、 點擊 service 創建兩個 api-service 的jar
4、點擊parent創建 兩個 兩個接口的實現 jar
實體類 是單獨建立一個項目 實體類存放在接口下面 接口可能會被別人調用 其他核心代碼就別寫到這里了 實體類還是可以的
代碼是吸納存放在接口實現類里面
依賴jar 放在parent
定義member 接口 和涉及到的 實體類
這里面的核心 訂單服務調用會員服務接口,用來實現feign客戶端 ,減少重復代碼
Eureka server:
pom:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.toov5</groupId> <artifactId>SpringCloud-eureka-server</artifactId> <version>0.0.1-SNAPSHOT</version> <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> <!--SpringCloud eureka-server --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> </dependencies> <!-- 注意: 這里必須要添加, 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> </project>
yml:
###eureka 服務端口號 server: port: 8100 ###服務注冊名稱 eureka: instance: ##注冊中心ip地址 hostname: 127.0.0.1 ###客戶端調用地址 client: serviceUrl: defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/ ###因為該應用為注冊中心,不會注冊自己 (集群設為true) register-with-eureka: false ###因為自己為注冊中心 ,不會去在該應用中的檢測服務 fetch-registry: false
啟動類:
package com.toov5; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @EnableEurekaServer //開啟注冊中心 @SpringBootApplication public class AppEureka { public static void main(String[] args) { SpringApplication.run(AppEureka.class, args); } }
業務邏輯部分:
其中service 是個pom文件 包括兩個model : member service 和 order service 兩個接口
實現類分別是 member service impl 和 order service
service 接口項目聚合:
Member:
entity:
package com.toov5.api.entity; import lombok.Data; @Data public class UserEntity { private String name; private Integer age; }
service接口:
package com.toov5.api.service; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import com.toov5.api.entity.UserEntity; @RestController public interface IMemberService { @RequestMapping("/getMember") //接口加@RequestMapping 被其他項目調用時候 feign客戶端可以繼承 public UserEntity getMember(@RequestParam("name") String name); }
實現:
pom:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>com.toov5</groupId> <artifactId>parent</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>toov5-api-member-service-impl</artifactId> <dependencies> <dependency> <groupId>com.toov5</groupId> <artifactId>toov5-api-member-service</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <dependency> <groupId>com.toov5</groupId> <artifactId>toov5-api-order-service</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> </dependencies> </project>
實現:
package com.toov5.api.service.impl; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import com.toov5.api.entity.UserEntity; import com.toov5.api.service.IMemberService; //注意加在實現類上面!!! 接口不能加 接口不能被實例化
@RestController
public class MemberServiceImpl implements IMemberService { @RequestMapping("/getMember") public UserEntity getMember(@RequestParam("name") String name) { UserEntity userEntity = new UserEntity(); userEntity.setName(name); userEntity.setAge(10); return userEntity; } }
啟動類:
package com.toov5.api.service.impl; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.openfeign.EnableFeignClients; @SpringBootApplication @EnableEurekaClient @EnableFeignClients public class AppMember { public static void main(String[] args) { SpringApplication.run(AppMember.class, args); } }
Order:
接口類:
package com.toov5.api.service; import org.springframework.web.bind.annotation.RequestMapping; public interface IOrderService { //訂單服務帶哦用會員服務接口信息fegin @RequestMapping("/orderToMember") public String orderToMember(String name); }
實現:
Feign: 通過繼承 減少代碼
package com.toov5.api.feign; import org.springframework.cloud.openfeign.FeignClient; import com.toov5.api.service.IMemberService; //避免了冗余代碼 直接過來就ok了 @FeignClient("app-toov5-member") public interface MemberServiceFeign extends IMemberService { //實體類是存放接口項目還是存放在實現項目 實體類存放在接口項目里面 //實體類和定義接口信息存放在接口項目 //代碼實現放在接口實現類里面 }
package com.toov5.api.service.impl; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import com.toov5.api.entity.UserEntity; import com.toov5.api.feign.MemberServiceFeign; import com.toov5.api.service.IOrderService; @RestController public class OrderServiceImpl implements IOrderService { @Autowired private MemberServiceFeign memberServiceFeign; @RequestMapping("orderToMmeber") public String orderToMember(String name) { UserEntity user = memberServiceFeign.getMember(name); return user==null ? "沒有找到用戶先關信息" : user.toString(); } }
package com.toov5.api; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.openfeign.EnableFeignClients; @SpringBootApplication(scanBasePackages={"com.toov5.*"}) @EnableEurekaClient @EnableFeignClients public class AppOrder { public static void main(String[] args) { SpringApplication.run(AppOrder.class, args); } }
yml:
###服務啟動端口號 server: port: 8001 ###服務名稱(服務注冊到eureka名稱) spring: application: name: app-toov5-order ###服務注冊到eureka地址 eureka: client: service-url: defaultZone: http://localhost:8100/eureka ###因為該應用為注冊中心,不會注冊自己 register-with-eureka: true ###是否需要從eureka上獲取注冊信息 fetch-registry: true
都啟動后:
訪問訂單接口
按照這個規范目錄去做 尤其@FeignClient要寫到客戶端里面 方便做服務降級
Feign默認開啟的本地負載均衡~