前言： 1.Eureka介绍：
Spring Cloud Eureka，使用Netflix Eureka来实现服务注册与发现，它既包含了服务端组件，也包含了客户端组件，并且服务端与客户端均采用Java编写，所以Eureka主要适用于通过Java实现的分布式系统，或是与JVM兼容语言构建的系统。
2.为什么使用Eureka假设我们要买一个商品，但是我们并不知道卖家是谁、在哪里，我们只要登录购物平台下单，平台就会负责通知卖家发货。我们不需要了解卖家的消息，就可以享受到服务。而卖家提供服务，它把服务注册到了购物平台上，我们才可以消费。
实现： 1.Eureka注册中心：cl_eureka （1）添加依赖 <?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 "> <modelVersion>4.0.0</modelVersion> <groupId>com.xm.cloud</groupId> <artifactId>cl_eureka</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>cl_eureka</name> <description>This is a Web about springcloud</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.6.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.SR1</spring-cloud.version> </properties> <dependencies> <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>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> （2）修改配置文件 server.port=7001 eureka.instance.hostname=localhost #拒绝向注册中心注册 eureka.client.register-with-eureka=false #拒绝注册中心扫描 eureka.client.fetch-registry=false eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/ （3）开启Eureka服务注解 package com.xm.cloud; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @EnableEurekaServer @SpringBootApplication public class ClEurekaApplication { public static void main(String[] args) { SpringApplication.run(ClEurekaApplication.class, args); } } 2.服务提供者：cl_hello_producer （1）添加依赖 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 "> <modelVersion>4.0.0</modelVersion> <groupId>com.xm.cloud</groupId> <artifactId>cl_hello_producer</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>cl_hello_producer</name> <description>This is a Web about springcloud</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Finchley.SR1</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${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> （2）修改配置 server.port=8001 spring.application.name=cl-hello-producer eureka.client.service-url.defaultZone=http://127.0.0.1:7001/eureka/