Ribbon--初步配置

修改microservicecloud-consumer-dept-80工程：
添加依赖：

<!-- Ribbon相关 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

修改application.yml 追加eureka的服务注册地址:

server:
  port: 80

eureka:
  client:
    register-with-eureka: false
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/, http://eureka7002.com:7002/eureka/, http://eureka7003.com:7003/eureka/

对ConfigBean进行新注解@LoadBalanced 获得Rest时加入Ribbon的配置:

@Configuration
public class ConfigBean {

    /*
        RestTemplate提供了多种便捷访问远程HTTP服务的方法
        是一种简单便捷的访问restful服务模板类，是Spring提供的用于访问Rest服务的客户端模板工具集

        url：REST请求地址
        requestMap：请求参数
        ResponseBean.class：HTTP响应转换被转换成的对象类型
     */
    @Bean
    @LoadBalanced //开启客户端的负载均衡
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }

}

主启动类DeptConsumer80_App添加@EnableEurekaClient:

@SpringBootApplication
@EnableEurekaClient
public class DeptCondumer80_App {

    public static void main(String[] args) {
        SpringApplication.run(DeptCondumer80_App.class, args);
    }
}

修改DeptController_Consumer客户端访问类:

@RestController
public class DeptController_Consumer {

    //private static final String REST_RUL_PREFIX = "http://localhost:8001";
    private static final String REST_RUL_PREFIX = "http://MICROSERVICECLOUD-DEPT";


    @Autowired
    RestTemplate restTemplate;

    @RequestMapping(value = "/consumer/dept/add")
    public boolean add(Dept dept){
        return restTemplate.postForObject(REST_RUL_PREFIX + "/dept/add", dept, Boolean.class);
    }

    @RequestMapping(value = "/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id){
        return restTemplate.getForObject(REST_RUL_PREFIX + "/dept/get/" + id, Dept.class);
    }

    @RequestMapping(value = "consumer/dept/list")
    public List<Dept> list(){
        return restTemplate.getForObject(REST_RUL_PREFIX + "/dept/list", List.class);
    }
}

先启动3个eureka集群后，再启动microservicecloud-provider-dept-8001并注册进eureka:

启动microservicecloud-consumer-dept-80:

测试:

http://localhost/consumer/dept/get/1

http://localhost/consumer/dept/list

http://localhost/consumer/dept/add?dname=大数据部

Ribbon和Eureka整合后Consumer可以直接调用服务而不用再关心地址和端口号