spring cloud 之 Eureka

 

1、eureka 服務端配置

        一、pom依賴 

<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-netflix-eureka-server -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    <version>2.2.0.RELEASE</version>
</dependency>

        二、配置文件

spring.application.name=springcloud-eureka-client
server.port=8000
## 取消服務器的自我註冊
eureka.client.register-with-eureka=false
## 不檢索服務
eureka.client.fetch-registry=false
## Eureka客戶端服務註冊地址
eureka.client.serviceUrl.defaultZone=http://localhost:8000/eureka/

      三、配置服務啓動

@SpringBootApplication
@EnableEurekaServer //開啓eureka服務
public class EuretaApplication {

    public static void main(String[] args) {
        SpringApplication.run(EuretaApplication.class, args);
        System.out.println("註冊服務中心啓動。。。。。。。");
    }

}

2、eureka 客戶端（註冊服務）

    一、pom依賴 

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>2.2.2.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-netflix-eureka-client -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    <version>2.2.0.RELEASE</version>
</dependency>

     二、配置文件

spring.application.name=spring-cloud-client
server.port=8004
## Eureka客戶端服務註冊地址
eureka.client.serviceUrl.defaultZone=http://localhost:8000/eureka/
## 實現自我註冊
eureka.client.register-with-eureka=true
## 檢索服務
eureka.client.fetch-registry=true

    三、代碼業務

@RestController
public class MemberApiContorller {

    @RequestMapping("/getMember")
    public String getMember(){

        return "this is member,and server port is :"+serverport;
    }
}

    四、客戶端啓動註冊

@SpringBootApplication
@EnableEurekaClient  //開啓客戶端註冊
public class EurekaCliApplication {

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

}

3、消費者

    一、pom依賴 

<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>
    <version>2.2.0.RELEASE</version>
</dependency>

    二、配置文件

spring.application.name=spring-cloud-order
server.port=8002
## Eureka客戶端服務註冊地址
eureka.client.serviceUrl.defaultZone=http://localhost:8000/eureka/
## 實現自我註冊
eureka.client.register-with-eureka=true
## 檢索服務
eureka.client.fetch-registry=true

    三、代碼業務

@RestController
public class OrderController {



    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping("/getOrder")
    public String getOrder(){
        //說明：spring-cloud-client是註冊服務的id，不是域名！
        String url = "http://spring-cloud-client/getMember";
        String result = restTemplate.getForObject(url, String.class);
        System.out.println("訂單服務返回："+result);
        return result;
    }
}

    四、客戶端啓動註冊

@SpringBootApplication
@EnableEurekaClient
public class EurekaOrderApplication {

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

    //解決RestTemplate找不到
    @Bean
    @LoadBalanced //解決負載均衡問題，若是不配置此註解，請求"http://spring-cloud-client/getMember"，報找不到此路徑錯誤，加上此註解，
                   // 自動找打服務名稱spring-cloud-client對應的服務，並返回正常的結果值
    RestTemplate getRestTemplate(){

        return new RestTemplate();
    }

}

注：初次研究，歡迎你們指正。