SpringBoot整合Eureka案例

以你之姓@ 2022-02-27 01:12 418阅读 0赞

### 一、创建买票工程做案例 ###

1）、创建三个项目consumer-user(消费者)、eureka-server(注册中心)、provider-ticket(生产者)

2）、目录结构如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70][]

### 二、配置案例需要的环境  ###

**环境一：eureka-server(注册中心)相关**

1）、所需jar

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

2）、全局环境配置

server:
      port: 8761
    eureka:
      instance:
        hostname: eureka-server  #eureka实例的主机名
      client:
        register-with-eureka: false #不注册本身到Eureka注册中心
        fetch-registry: false #不从Eureka注册中心获取服务的注册信息
        service-url:
          defaultZone: http://localhost:8761/eureka/

3）、启动访问

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70 1][]

**环境二：provider-ticket(生产者)相关**

1）、所需jar

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

2）、全局环境配置

#启动端口
    server:
      port: 8001
    #项目名称
    spring:
      application:
        name: provider-ticket
    #eureka配置
    eureka:
      instance:
        prefer-ip-address: true #使用服务的id地址注册
      client:
        service-url:
          defaultZone: http://localhost:8761/eureka/

3）、启动项目，访问注册中心查看是否注册成功

![2019032614273610.png][]

**环境三：consumer-user(消费者)相关 **

1）、所需jar跟生产者一样

2）、全局环境配置

server:
      port: 8002
    spring:
      application:
        name: consumer-user
    eureka:
      instance:
        prefer-ip-address: true #使用服务的id地址注册
      client:
        service-url:
          defaultZone: http://localhost:8761/eureka/

3）、启动项目，访问注册中心看是否注册成功

![20190326143132221.png][]

### 三、案例相关代码  ###

1）、eureka-server(注册中心)开启Eureka服务

启动类：

@EnableEurekaServer//启用Eureka服务
    @SpringBootApplication
    public class EurekaServerApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(EurekaServerApplication.class, args);
        }
    
    }

2）、 provider-ticket(生产者)

service类：

@Service
    public class TicketService {
        public String getTicket(){
            return "《绿皮书》";
        }
    }

controller类：

@RestController
    public class TicketController {
        @Autowired
        TicketService ticketService;
        @GetMapping("/ticket")
        public  String getTicket(){
            return  ticketService.getTicket();
        }
    }

3）、 consumer-user(消费者)

注入远程访问模板类：

@Bean
        @LoadBalanced//启用负载均衡机制
        public RestTemplate restTemplate(){
            return new RestTemplate();
        }

controller类：

@RestController
    public class UserController {
        @Autowired
        RestTemplate restTemplate;
        @GetMapping("/buy")
        public String buyTicket(String name){
            String template = restTemplate.getForObject("http://PROVIDER-TICKET/ticket", String.class);
            return name+"购买了"+template;
        }
    }

###   四、访问购票接口验证是否整合成功 ###

![20190326144029618.png][]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70 1]: /images/20220227/6d2e331294284982b956a6983fd4e2b7.png
[2019032614273610.png]: /images/20220227/6116cfb60b7643cd8535b857ba933ac0.png
[20190326143132221.png]: /images/20220227/1aaf5bf619074bde8f538cf42574e087.png
[20190326144029618.png]: /images/20220227/fa94ec2259ab44e587ec7b3a110270c1.png