eureka的简单用法

Posted 2021-12-01 laivieeeee

1

.创建maven工程

2.添加web和eureka依赖

在pom.xml添加依赖如下，目的是@DATA用到

<!-- lombok代码模板解决方案，没有使用lombok的可以把这个依赖删除 -->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.16.10</version>
</dependency>

3.编写服务端口和注册配置application.yml

server:
  port: 8761
spring:
  application:
      name: eureka-server1
eureka:
  instance:
    hostname: server1
  client:
    registerWithEureka: false
    fetchRegistry : false
    serviceUrl:
      defaultZone: http://server2:8762/eureka/
4.编写启动类EurekaServerApplication.java,添加@EnableEurekaServer

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {

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

}
4-2启动

5.用统样方法配置端口8762的服务注册，和8761互相注册调用

6.编写消费者consumer，

用同样方法创建springboot的项目，

配置application.yml如下

server:
  port: 8084

spring:
  application:
    name: eureka-consumer

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka,http://localhost:8762/eureka
编写启动类如下：

@SpringBootApplication
@EnableEurekaClient
public class MicreoserviceDicoveryEurekaConsumerApplication {

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

}
编写控制层类如下

@Controller
@Configuration
public class ConsumerController {
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
//当访问localhost：8084/router时跳转到http://eureka-provider/search/1地址

    @GetMapping(value = "/router")
    @ResponseBody
    public String router() {
        RestTemplate temp = getRestTemplate();
        return temp.getForObject("http://eureka-provider/search/1", String.class);
    }
}

7.用同样方法创建springboot的供应商类
application.yml如下

spring:
  application:
    name: eureka-provider

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka,http://localhost:8762/eureka
server:
  port: 8082
启动类如下：

@SpringBootApplication
@EnableEurekaClient
public class MicreaoserviceDicoveryEurekaProvider02Application {

        public static void main (String[]args){
            SpringApplication.run(MicreaoserviceDicoveryEurekaProvider02Application.class, args);
        }

}
控制层类如下

@RestController
public class ProviderController {

    @RequestMapping(value = "/search/{id}", method = RequestMethod.GET,produces = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public Person searchPerson(@PathVariable Integer id, HttpServletRequest request) {
        Person person = new Person();
        person.setId(id);
        person.setName("Spirit");
        person.setMessage(request.getRequestURL().toString());
        return person;

    }
}

实体类如下

@Data
public class Person {

    private Integer id;          //主键ID
    private String name;      //姓名
    private String message;       //信息

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

8.先启动8761和8762端口，然后访问http://localhost:8762/和http://localhost:8761/可以看到注册的端口

9.再启动8082和8084端口，然后访问localhost:8084/router会跳转到http://eureka-provider/search/1页面