新建一个工程,名为eureka-client,pom.xml文件依赖如下:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.8.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.hangzhou.springcloud</groupId>
<artifactId>eureka-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>eureka-client</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Hoxton.SR6</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
EurekaClientApplication类代码如下:
//@EnableDiscoveryClient注解表示是此工程是一个客户端
@EnableDiscoveryClient
@SpringBootApplication
public class EurekaClientApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaClientApplication.class, args);
}
}
application.properties配置文件如下:
# 指定运行端口号
server.port=1112
# 指定服务名称
spring.application.name=hello-service
# 注册到Eureka的注册中心
eureka.client.register-with-eureka=true
# 获取注册实例列表
eureka.client.fetch-registry=true
# 配置注册中心地址
eureka.client.service-url.defaultZone=http://localhost:1111/eureka
HelloController类代码如下:
@RequestMapping(value="/test")
@RestController
public class HelloController {
private final Logger logger = LoggerFactory.getLogger(HelloController.class);
@Autowired
private DiscoveryClient discoveryClient;
@RequestMapping(value="hello",method=RequestMethod.GET)
public String index() {
List<ServiceInstance> instances = discoveryClient.getInstances("hello-service");
ServiceInstance serviceInstance = instances.get(0);
logger.info("/hello,host:"+ serviceInstance.getHost()+",server_id:"+serviceInstance.getPort());
return "hello word";
}
}
运行注册中心的工程,再启动此工程,打开http://localhost:1111,效果如下:
可以看到有一条注册信息。话不多说启动刚才我们建的hello-service工程,效果如下: