SpringCloud学习（二）--Eureka注册中心

朴灿烈づ我的快乐病毒、 2022-12-23 11:24 175阅读 0赞

**目录**

一、新建Eureka-server工程

二、添加依赖

三、添加启动器

四、添加相关配置

五、启动测试

六、客户端服务改造

1）服务注册 --- user-service

a）引入依赖

b）修改启动器

c）修改配置文件

d）测试验证

2）服务发现 --- consumer-demo

a）引入依赖

b）修改启动器

c）修改配置文件

d）修改调用服务的方式

e）测试

七、其他截图

1、Eureka注册中心打印

2、user-service

3、consumer-demo

八、gitee地址

--------------------

# 一、新建Eureka-server工程 #

![20201125000817512.png][]

新建完成后工程结构如下

![20201125000902267.png][]

# 二、添加依赖 #

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

这里因为在父工程已经做了spring-cloud工程依赖的版本控制，所以，无需再指定版本

# 三、添加启动器 #

package com.wayne;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
    
    
    @EnableEurekaServer//声明当前服务为Eureka服务
    @SpringBootApplication
    public class EurekaServerApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(EurekaServerApplication.class,args);
        }
    }

# 四、添加相关配置 #

编辑application.yml文件

server:
      port: 10086
    spring:
      application:
        name: eureka-server
    eureka:
      client:
        service-url:
          # eureka服务地址，如果是集群的话；需要指定其他集群的eureka地址
          defaultZone: http://127.0.0.1:10086/eureka
        # 不注册自己
        register-with-eureka: false
        # 不拉取服务
        fetch-registry: false

# 五、启动测试 #

测试页面如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70][]

# 六、客户端服务改造 #

## 1）服务注册 --- user-service ##

###      a）引入依赖 ###

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

###      b）修改启动器 ###

package com.wayne;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import tk.mybatis.spring.annotation.MapperScan;
    
    @SpringBootApplication
    @MapperScan("com.wayne.mapper")
    @EnableDiscoveryClient //开启Eureka客户端发现功能/**************/
    public class UserApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(UserApplication.class,args);
        }
    }

###      c）修改配置文件 ###

spring:
      application:
        name: user-service
    eureka:
      client:
        service-url:
          defaultZone: http://127.0.0.1:10086/eureka

###      d）测试验证 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 1][]

## 2）服务发现 --- consumer-demo ##

###     a）引入依赖 ###

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

###     b）修改启动器 ###

package com.wayne;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.context.annotation.Bean;
    import org.springframework.web.client.RestTemplate;
    
    @SpringBootApplication
    @EnableDiscoveryClient //开启eureka客户端发现功能
    public class ConsumerApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(ConsumerApplication.class,args);
        }
    
        @Bean
        public RestTemplate restTemplate(){
            return new RestTemplate();
        }
    }

###     c）修改配置文件 ###

spring:
      application:
        name: consumer-demo
    eureka:
      client:
        service-url:
          defaultZone: http://127.0.0.1:10086/eureka

###     d）修改调用服务的方式 ###

package com.wayne.controller;
    
    import com.wayne.pojo.User;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.cloud.client.ServiceInstance;
    import org.springframework.cloud.client.discovery.DiscoveryClient;
    import org.springframework.web.bind.annotation.GetMapping;
    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 java.util.List;
    
    @Slf4j
    @RestController
    @RequestMapping("/consumer")
    public class ConsumerController {
    
        @Autowired
        private RestTemplate restTemplate;
    
        @Autowired
        private DiscoveryClient discoveryClient;//服务发现客户端
    
        @GetMapping("/{id}")
        public User queryById(@PathVariable Long id){
            //String url = "http://localhost:9091/user/1";
    
            List<ServiceInstance> userInstances = discoveryClient.getInstances("user-service");
    
            ServiceInstance userInstance = userInstances.get(0);
    
            String url = "http://"+userInstance.getHost()+":"+userInstance.getPort()+"/user/"+id;
    
            log.info(url);
    
            return restTemplate.getForObject(url, User.class);
        }
    }

###     e）测试 ###

浏览器输入 [http://localhost:8080/consumer/1][http_localhost_8080_consumer_1]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 2][]

# 七、其他截图 #

## 1、Eureka注册中心打印 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 3][]

## 2、user-service ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 4][]

## 3、consumer-demo ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 5][]

# 八、gitee地址 #

[传送门][Link 1]

[20201125000817512.png]: /images/20221120/1c8253308b7e4f4e9dfb192558c77ee0.png
[20201125000902267.png]: /images/20221120/b25256d0eb684402bc2fafc93d0b444e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20201125001542745.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20201125002802730.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ==,size_16,color_FFFFFF,t_70
[http_localhost_8080_consumer_1]: http://localhost:8080/consumer/1
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/2020112500431445.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/2020112500444386.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20201125004548976.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ_size_16_color_FFFFFF_t_70 5]: https://img-blog.csdnimg.cn/2020112500461678.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E4MEM1MQ==,size_16,color_FFFFFF,t_70
[Link 1]: https://gitee.com/wayneBatman007/spring-cloud-demo