一般需要三个项目，注册中心也就是Eureka注册中心项目，服务的调用方和服务的接口提供方。
1.首先新建maven工程，eureka-server项目
新建完毕，引入pom依赖
org.springframework.boot
spring-boot-starter-parent
1.5.2.RELEASE
UTF-8
UTF-8
1.8
org.springframework.cloud
spring-cloud-starter-eureka-server
org.springframework.boot
spring-boot-starter-test
test
org.springframework.cloud
spring-cloud-dependencies
Dalston.RC1
pom
import
org.springframework.boot
spring-boot-maven-plugin
spring-milestones
Spring Milestones
https://repo.spring.io/milestone
false
然后配置yml配置文件
/eureka-server/src/main/resources/application.yml
配置文件内容如下
server:
port: 8888 端口号
eureka:
instance:
hostname: localhost 启动地址，这里默认为本地
client:
registerWithEureka: false
fetchRegistry: false
serviceUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/ eureka注册中心地址
然后创建启动类（注意注解要使用正确）
EurekaApp.java
package com.lwq;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@SpringBootApplication
@EnableEurekaServer
public class EurekaApp {
public static void main(String[] args) {
SpringApplication.run(EurekaApp.class, args);
}
}
启动项目，访问http://localhost:8888/成功访问说明配置正确
2.创建服务提供者，即service-member（这里一会员服务为例）
同样，创建工程需要引入maven依赖
org.springframework.boot
spring-boot-starter-parent
1.5.2.RELEASE
UTF-8
UTF-8
1.8
org.springframework.cloud
spring-cloud-starter-eureka
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
test
org.springframework.cloud
spring-cloud-dependencies
Dalston.RC1
pom
import
org.springframework.boot
spring-boot-maven-plugin
spring-milestones
Spring Milestones
https://repo.spring.io/milestone
false
然后引入配置文件application.yml
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8888/eureka/ 此处为eureka本地工程地质
server:
port: 8762
spring:
application:
name: service-member 此处为服务调用的名称
创建启动类MemberApp.java
package com.lwq;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient //注意这里是client，而注册中心那里是 server
public class MemberApp {
public static void main(String[] args) {
SpringApplication.run(MemberApp.class, args);
}
}
创建接口服务
MemberController.java
package com.lwq;
import java.util.ArrayList;
import java.util.List;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class MemberController {
@RequestMapping("/getUserList")
public List getUserList() {
List listUser = new ArrayList();
listUser.add("zhangsan");
listUser.add("lisi");
listUser.add("wangwu");
return listUser;
}
}
启动查看eureka注册中心会出现有服务注册成功
image.png
此时访问项目地址就可以成功返回
image.png
3.下面我们创建服务的调用者 service-order服务，通过rest方式进行调用
创建完毕引入依赖
org.springframework.boot
spring-boot-starter-parent
1.5.2.RELEASE
UTF-8
UTF-8
1.8
org.springframework.cloud
spring-cloud-starter-eureka
org.springframework.cloud
spring-cloud-starter-ribbon
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
test
org.springframework.cloud
spring-cloud-dependencies
Dalston.RC1
pom
import
org.springframework.boot
spring-boot-maven-plugin
spring-milestones
Spring Milestones
https://repo.spring.io/milestone
false
引入yml文件
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8888/eureka/
server:
port: 8764
spring:
application:
name: service-order
创建启动类OrderApp.java
package com.lwq;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication
@EnableEurekaClient
public class OrderApp {
public static void main(String[] args) {
SpringApplication.run(OrderApp.class, args);
}
/**
* 启用rest方法进行调用
* @return
*/
@Bean
@LoadBalanced //允许负载均衡
RestTemplate restTemplate() {
return new RestTemplate();
}
}
编写service,调用service-member
@SuppressWarnings("unchecked")
@Service
public class MemberService {
@Autowired
RestTemplate restTemplate;
public List getOrderByUserList() {
//这里直接写服务提供者的名称即可
return restTemplate.getForObject("http://service-member/getUserList", List.class);
}
}
创建controller类型进行调用完成正确返回信息
package com.lwq;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class OrderController {
@Autowired
private MemberService memberService;
@RequestMapping("getOrderByUserList")
public List getOrderByUserList() {
return memberService.getOrderByUserList();
}
}
小提示：注意三个项目的启动顺序，一定要是eureka项目首先启动，不然无法完成注册会报错