1.启动主java文件 DiscoveryApplication.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient //发现注册中心的服务
public class DiscoveryApplication {
public static void main(String[] args) {
SpringApplication.run(DiscoveryApplication.class, args);
}
}
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2.服务提供控制器 HelloController.java
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
public class HelloController {
private final Logger log = LoggerFactory.getLogger(HelloController.class);
@Autowired
private DiscoveryClient client;//eureka服务发现接口
@RequestMapping(value = "/hello",method = RequestMethod.GET)
public String index(){
List<ServiceInstance> instances = client.getInstances("hello-server");
for (ServiceInstance instance:instances ) {
log.info("/hello"+instance.getHost() + "---server---"+instance.getServiceId());
}
return "DiscoveryApplication";
}
}
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3.服务提供核心配置文件
spring:
application:
name: hello-server
server:
port: 9000
eureka:
instance:
lease-expiration-duration-in-seconds: 30 #参数用于定于服务时效时间
lease-renewal-interval-in-seconds: 10 #用户定义与注册中心续约时间
hostname: localhost
client:
service-url:
defaultZone: http://peer1:8761/eureka/ #注册中心地址
enabled: true
register-with-eureka: true #向注册中心注册此服务
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4.依赖pom.xml文件
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.hnair</groupId>
<artifactId>discovery</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>discovery</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
</properties>
<dependencies>
<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-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</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>
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访问地址:http://localhost:9000/hello