1. 创建注册中心 cloud-server 创建spring boot项目cloud-server (1. pom.xml文件依赖
<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-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency>(2. application.yml文件配置
#配置服务端的端口号 server: port: 7771 #eureka本身即是服务端又是客户端，只做服务需要把科户端关掉 eureka: client: register-with-eureka: false fetch-registry: false #配置注册中心的注册地址 service-url: defaultZone: http://localhost:7771/eureka #应用名称 spring: application: name: server(3. 启动类添加注解
@SpringBootApplication @EnableEurekaServer public class CloudServerApplication { public static void main(String[] args) { SpringApplication.run(CloudServerApplication.class, args); } }(4. 启动项目，浏览器访问 http://localhost:7771/ 看到如下界面 2. 创建服务提供者 cloud-service-provider1、cloud-service-provider2 创建spring boot项目cloud-service-provider1 (1. pom.xml依赖
<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> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency>(2. application.yml配置
#配置端口号 server: port: 8771 #引入注册中心 eureka: client: service-url: defaultZone: http://localhost:7771/eureka #配置应用名称 spring: application: name: provider(3. 启动类配置注解
@SpringBootApplication @EnableEurekaClient public class CloudServiceProviderApplication { public static void main(String[] args) { SpringApplication.run(CloudServiceProviderApplication.class, args); } }(4. 创建Controller层
package org.lhj.pro.controller; import javax.servlet.http.HttpServletRequest; import org.lhj.pro.service.ProviderService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; @RestController public class ProviderController { @Autowired private ProviderService aservice; @RequestMapping("/helloribbon") public String helloRibbon(HttpServletRequest request) { String uri = request.getRequestURI(); int port = request.getLocalPort(); String ip = request.getRemoteAddr(); return aservice.helloRibbon() + ip + ":" + port + uri; } }(5. 创建Service层和实现类 service接口
package org.lhj.pro.service; //这里的服务名不区分大小写 public interface ProviderService { String helloRibbon(); }service实现类
package org.lhj.pro.service; import org.springframework.stereotype.Service; @Service public class ProviderServiceImpl implements ProviderService{ @Override public String helloRibbon() { return "ribbon跑通了"; } }3. 将创建的项目cloud-service-provider1复制一份，修改项目名称为cloud-service-provider2 并且将application.yml的端口号改为8772，应用名称不用改，和provider1项目的一样即可。 启动注册中心cloud-server和两个服务提供者cloud-service-provider1、cloud-service-provider2，会发现 注册中心多了一个应用，并且有两个服务可用8771和8772 4. 创建服务消费者 cloud-consumer-ribbon (1. pom.xml配置依赖
<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-server</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-ribbon</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency>(2. 添加application.yml配置
#服务端口 server: port: 9871 #注册中心地址 eureka: client: service-url: defaultZone: http://localhost:7771/eureka/ #定义应用名称 spring: application: name: consumer-ribbon(3. 启动类添加注解
package org.lhj.pro; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.context.annotation.Bean; import org.springframework.web.client.RestTemplate; @SpringBootApplication @EnableDiscoveryClient public class CloudRibbonApplication { public static void main(String[] args) { SpringApplication.run(CloudRibbonApplication.class, args); } }(4. 创建RestTemplate配置
package org.lhj.pro.config; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.client.RestTemplate; @Configuration public class GetRestTemplate { @Bean @LoadBalanced public RestTemplate restTemplate() { return new RestTemplate(); } }(5. 创建RibbonController
package org.lhj.pro.controller; import org.lhj.pro.service.RibbonServiceImpl; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController @RequestMapping("/ribbon") public class RibbonController { @Autowired RibbonServiceImpl helloService; @RequestMapping("/hello") public String testHello() { return helloService.testHello(); } }(6. 创建RibbonServiceImpl
package org.lhj.pro.service; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.web.client.RestTemplate; @Service public class RibbonServiceImpl { @Autowired RestTemplate restTemplate; public String testHello() { // 1. provider 为提供服务的应用名称 // 2. helloRibbon 为提供服务应用里的接口方法 return restTemplate.getForObject("http://provider/helloribbon", String.class); } }启动服务消费者cloud-consumer-ribbon，发现注册中心有多了一个应用 请求RibbonController的接口 http://localhost:9871/ribbon/hello 效果如下： 到此为止，spring cloud 之ribbon调用成功!
