SpringCloud2.0基于Feign父子工程
- 项目结构
——springcloud-2.0-dawn-eureka-server — jar
——springcloud-2.0-dawn-parent —pom
————springcloud2.0-dawn-api-service —pom
——————springcloud2.0-dawn-api-member-service —jar
——————springcloud2.0-dawn-api-order-service —jar
————springcloud2.0-dawn-api-member-service-impl —jar
————springcloud2.0-dawn-api-order-service-impl —jar - springcloud-2.0-dawn-eureka-server
maven
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.1.RELEASE</version>
</parent>
<!-- 管理依赖 -->
<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: 这里必须要添加, 否者各种依赖有问题 -->
<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>
application.yml
###服务端口号
server:
port: 8100
###eureka 基本信息配置
eureka:
instance:
###注册到eurekaip地址
hostname: 127.0.0.1
client:
serviceUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
###因为自己是为注册中心,不需要自己注册自己
register-with-eureka: false
###因为自己是为注册中心,不需要检索服务
fetch-registry: false
启动Eureka服务
@EnableEurekaServer
@SpringBootApplication
public class AppEureka {
public static void main(String[] args) {
SpringApplication.run(AppEureka.class, args);
}
}
- springcloud-2.0-dawn-parent
maven
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.1.RELEASE</version>
</parent>
<!-- 管理依赖 -->
<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组件 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- SpringBoot整合eureka客户端 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!-- SpringBoot整合fegnin客户端 -->
<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: 这里必须要添加, 否者各种依赖有问题 -->
<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>
- springcloud2.0-dawn-api-service
- springcloud2.0-dawn-api-member-service
实体类 com.dawn.api.entity UserEntity
public class UserEntity {
private String name;
private String age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
@Override
public String toString() {
return "UserEntity [name=" + name + ", age=" + age + "]";
}
}
会员服务接口 com.dawn.api.service IMemberService
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.dawn.api.entity.UserEntity;
public interface IMemberService {
@RequestMapping("/getMember")
public UserEntity getMember(@RequestParam("name")String name);
}
- springcloud2.0-dawn-api-order-service
订单服务接口 com.dawn.api.service IOrderService
import org.springframework.web.bind.annotation.RequestMapping;
public interface IOrderService {
//订单服务调用会员服务接口信息
@RequestMapping("/orderToMember")
public String orderToMember(String name);
}
- springcloud2.0-dawn-api-member-service-impl
maven
<dependencies>
<dependency>
<groupId>com.dawn</groupId>
<artifactId>springcloud2.0-dawn-api-member-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
会员服务接口实现类 com.dawn.service.impl MemberServiceImpl
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.dawn.api.entity.UserEntity;
import com.dawn.api.service.IMemberService;
@RestController
public class MemberServiceImpl implements IMemberService {
@RequestMapping("/getMember")
public UserEntity getMember(@RequestParam String name) {
UserEntity userEntity = new UserEntity();
userEntity.setName(name);
userEntity.setAge("20");
return userEntity;
}
}
启动类 com.dawn
@SpringBootApplication
@EnableFeignClients
@EnableEurekaClient
public class AppMember {
public static void main(String[] args) {
SpringApplication.run(AppMember.class, args);
}
}
- springcloud2.0-dawn-api-order-service-impl
maven
<dependencies>
<dependency>
<groupId>com.dawn</groupId>
<artifactId>springcloud2.0-dawn-api-order-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.dawn</groupId>
<artifactId>springcloud2.0-dawn-api-member-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
application.yml
###服务启动端口号
server:
port: 8020
###服务名称(服务注册到eureka名称)
spring:
application:
name: app-dawn-order
###服务注册到eureka地址
eureka:
client:
service-url:
defaultZone: http://localhost:8100/eureka
###因为该应用为注册中心,不会注册自己
register-with-eureka: true
###是否需要从eureka上获取注册信息
fetch-registry: true
Fegin 接口com.dawn.api.feign
import org.springframework.cloud.openfeign.FeignClient;
import com.dawn.api.service.IMemberService;
@FeignClient("app-dawn-member")
public interface MemberServiceFegin extends IMemberService{
//服务降级 熔断
//实体类存放在接口项目里面
//实体类和定义接口信息存放在接口项目
//代码实现存放在接口实现类中
}
订单服务实现接口 com.dawn.api.service.impl
@RestController
public class OrderServiceImpl implements IOrderService{
//订单服务继承会员服务接口,用来实现feign客户端 减少重复接口代码
@Autowired
private MemberServiceFegin memberServiceFegin;
@RequestMapping("/orderToMember")
public String orderToMember(String name) {
UserEntity user = memberServiceFegin.getMember(name);
return user==null?"没有找到用户信息":user.toString();
}
}
启动类 com.dawn.api
@EnableEurekaClient
@SpringBootApplication
@EnableFeignClients
public class AppOrder {
public static void main(String[] args) {
SpringApplication.run(AppOrder.class, args);
}
}