1 第一步

1）建立eureka服務中心 //相當於dubbo使用zookeeper的原理

pom.xml

 <dependency>
 
        <groupId>org.springframework.cloud</groupId>
		
        <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
		
    </dependency>

2. application.properties

eureka.client.service-url.defaultZone=

http://localhost:8761/eureka/

server.port=8001

eureka.instance.hostname=eureka-server

eureka.client.register-with-eureka=false

eureka.client.fetch-registry=false

3)在主應用中啟用eureka @EnableEurekaServer

測試結果

2 建立服務提供者的應用

1）pom.xml

<dependency>

        <groupId>org.springframework.cloud</groupId>
		
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		
		</dependency>
 

2. application.properties

server.port=8002

spring.application.name=provider

#使用服務的ip地址來進行註冊

eureka.instance.prefer-ip-address=true

eureka.client.service-url.defaultZone:http://127.0.0.1:8761/eureka/

3. 建立提供的服務內容 @Service public class BookService { public String getBook(){ return "少年，還好嗎？"; } }

4)建立向外提供服務的controller @RestController

public class BookController {

@Autowired

BookService bookService;

@GetMapping("/book")

public String getBook(){

  return  bookService.getBook();

} }

3 建立消費者

1）pom.xml

<dependency>

        <groupId>org.springframework.cloud</groupId>
		
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		
    </dependency>

2. application.properties

spring.application.name=consumer

server.port=8200

eureka.instance.prefer-ip-address=true

eureka.client.service-url.defaultZone:http://localhost:8761/eureka/

3）編寫呼叫服務的controller

@RestController

public class helloController {

@Autowired

RestTemplate restTemplate;

@GetMapping("/hello")

public String UserBook(String name){

String s=  restTemplate.getForObject("http://PROVIDER/book",String.class);

  return name+"購買了"+s;

} }

4)啟用從遠端呼叫服務 @EnableDiscoveryClient

@SpringBootApplication

public class ConsumerApplication {

public static void main(String[] args) {

    SpringApplication.run(ConsumerApplication.class, args);
}

@Bean

@LoadBalanced

public RestTemplate restTemplate(){

return new RestTemplate();

} }

測試結果：

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