SpringCloud篇之服务的注册与发现

       1.springcloud是基于springboot的分布式系统架构，是一系列框架的有序集合，其中包括服务发现注册、配置中心、消息总线、负载均衡、断路器、数据监控等，都可以用Spring Boot的开发风格做到一键启动和部署。本文讲诉的是服务的注册与发现

  2.准备两个springboot的项目，分别命名为eurekaServer（服务端）和eurekaClient（客户端）。

使用到的springcloud模块：spring-cloud-starter-eureka-server

3.服务注册中心eurekaServer（服务端）：

1）打开eurekaServer项目的pom.xml文件，引入下面的文件

<?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.example</groupId>    <artifactId>eurekaserver</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>jar</packaging>    <name>eurekaserver</name>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.5.2.RELEASE</version>        <relativePath/>     </parent>    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>        <java.version>1.8</java.version>    </properties>    <dependencies>        <!--eureka server -->        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-eureka-server</artifactId>        </dependency>        <!-- spring boot test-->        <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>Dalston.RC1</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>    <repositories>        <repository>            <id>spring-milestones</id>            <name>Spring Milestones</name>            <url>https://repo.spring.io/milestone</url>            <snapshots>                <enabled>false</enabled>            </snapshots>        </repository>    </repositories></project>

2).修改application.yml（springboot 项目主要配置文件，如端口号，服务注册中心）

server:  port: 8281eureka:  instance:    hostname: localhost  client:    registerWithEureka: false    fetchRegistry: false    serviceUrl:      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

3）.打开eurekaServer.java文件在主类上添加注解

4）.右键运行main方法，在浏览器内输入localhost:8281 ，会出现如下界面

注：红线框部分为服务的展示，目前还没有接入服务，所以列表是空的，这样服务注册中心已经搞定啦。

项目源码地址：https://github.com/qichunlei/eurekaServer.git

3.eurekaClient(客户端)

1).打开eurekaClient项目。修改pom.xml

<?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.example</groupId>    <artifactId>service-hi</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>jar</packaging>    <name>service-hi</name>    <description>Demo project for Spring Boot</description>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.5.2.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>    </properties>    <dependencies>        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-eureka</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</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>Dalston.RC1</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>    <repositories>        <repository>            <id>spring-milestones</id>            <name>Spring Milestones</name>            <url>https://repo.spring.io/milestone</url>            <snapshots>                <enabled>false</enabled>            </snapshots>        </repository>    </repositories></project>

2)。修改application.yml配置文件（主配置文件）

eureka:  client:    serviceUrl:      defaultZone: http://localhost:8781/eureka/server:  port: 8782spring:  application:    name: eureka-service    

） 3）.主类添加注解

4).启动main方法然后刷线eureka页面

出现这个就证明服务发布成功啦