spring cloud netflix eureka ribbon 示例

示例分三部分，

eureka-server   服务注册中心

eureka-provider   服务提供者

eureka-consumer   服务调用者

eureka-server   服务注册中心

简单的 boot

package com.yonyou;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@EnableEurekaServer         //开启eureka服务
@SpringBootApplication      //springBoot注解,spring在springBoot基础之上来构建项目
public class EurekaServiceApplication {

//spirng boot的标准入口
public static void main(String[] args) {
SpringApplication.run(EurekaServiceApplication.class, args);
}
}

配置文件

spring.application.name=eureka-server
server.port=8888

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

logging.level.com.netflix.eureka=OFF
logging.level.com.netflix.discovery=OFF

eureka.client.serviceUrl.defaultZone=http://127.0.0.1:${server.port}/eureka/

eureka-provider   服务提供者

package com.yonyou;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
* @author Administrator
*
*/
@EnableDiscoveryClient            //通过该注解，实现服务发现，注册
@SpringBootApplication
public class EurekaClientApplication {

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

}

@RestController
class ServiceInstanceRestController {

@Autowired
private DiscoveryClient discoveryClient;

@RequestMapping("/service-instances/{applicationName}")
public List<ServiceInstance> serviceInstancesByApplicationName(
@PathVariable String applicationName) {
return this.discoveryClient.getInstances(applicationName);
}

@RequestMapping("/info")
public String sayhello() {
return "client-student";
}
}

服务功能

package com.yonyou.student.web;
import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import com.yonyou.student.Student;

@RestController
@RequestMapping("/student")
class StudentController {

@RequestMapping("list")
public List<Student> list() {
List<Student> list = new ArrayList<Student>();
list.add(new Student(111,"yaoming","156787787823","china shanghai"));
list.add(new Student(222,"chenglong","13898687682","china hongkong"));
list.add(new Student(333,"lilianjie","187923420023","china beijing"));
return list;
}

}

配置

spring.application.name=eureka-provider
server.port=7070

logging.level.com.netflix.eureka=OFF
logging.level.com.netflix.discovery=OFF

eureka.client.serviceUrl.defaultZone=http://127.0.0.1:8888/eureka/

eureka-consumer   服务调用者

boot 和 调用服务

package com.yonyou;
import java.net.URI;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.context.annotation.Bean;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
* @author Administrator
*
*/
@EnableDiscoveryClient            //通过该注解，实现服务发现，注册
@SpringBootApplication
public class EurekaClientApplication {

/**
* LoadBalanced 注解表明restTemplate使用LoadBalancerClient执行请求
*/
@Bean
@LoadBalanced
public RestTemplate restTemplate() {
RestTemplate template = new RestTemplate();
SimpleClientHttpRequestFactory factory = (SimpleClientHttpRequestFactory) template.getRequestFactory();
factory.setConnectTimeout(3000);
factory.setReadTimeout(3000);
return template;
}

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

}

@RestController
class ServiceInstanceRestController {

@Autowired
@LoadBalanced
RestTemplate restTemplate;

@Autowired
private DiscoveryClient discoveryClient;

@RequestMapping("/service-instances/{applicationName}")
public List<ServiceInstance> serviceInstancesByApplicationName(
@PathVariable String applicationName) {
return this.discoveryClient.getInstances(applicationName);
}

@RequestMapping("/info")
public String sayhello() {
return "client-teacher";
}

// Restful服务对应的url地址
@Value("${rest.student.list}")
private String restStudentList;

@RequestMapping("/students")
public String test() {

//    	ServiceInstance instance = loadBalancer.choose("eureka-client-student");
//    	URI uri = instance.getUri();

List list =  restTemplate.getForObject(restStudentList, List.class);

return list.toString();
}

}

配置文件

spring.application.name=eureka-consumer
server.port=6060

logging.level.com.netflix.eureka=OFF
logging.level.com.netflix.discovery=OFF

eureka.client.serviceUrl.defaultZone=http://127.0.0.1:8888/eureka/

rest.student=http://eureka-provider:7070
rest.student.list=${rest.student}/student/list

效果图

注册中心，看到注册的应用



查看provider 自身的服务



使用consumer 调用 provider的服务



示例下载地址：
http://download.csdn.net/detail/stonexmx/9769755