Spring Cloud(Dalston.SR5)--Eureka 服务提供者

要使微服务应用向注册中心发布自己,首先需要在 pom.xml 配置文件中增加对 spring-boot-starter-eureka 的依赖,然后在主类中增加 @EnableDiscoveryClient 注解来启动服务注册(必须在项目中实现了RESTful 服务)。

  • 创建项目

    创建名称为 service-provider 的 Spring Cloud 项目,修改 POM.xml 中增加以下依赖项:

    <?xmlversion="1.0"encoding="UTF-8"?>

    <projectxmlns="http://maven.apache.org/POM/4.0.0"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

       

    <groupId>org.lixue.webservice</groupId>

    <artifactId>service-provider</artifactId>

    <version>1.0-SNAPSHOT</version>

    <parent>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-parent</artifactId>

    <version>1.5.4.RELEASE</version>

    <relativePath/><!--lookupparentfromrepository-->

    </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>Dalston.SR5</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-eureka</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>

       

  • 创建 REST 服务

    创建 HelloWorldController 类,用来提供 REST 服务器,代码如下:

    package org.lixue.webservices.services;

       

    import org.springframework.web.bind.annotation.RequestMapping;

    import org.springframework.web.bind.annotation.RequestMethod;

    import org.springframework.web.bind.annotation.RequestParam;

    impor torg.springframework.web.bind.annotation.RestController;

       

    @RestController

    publicclassHelloWorldController{

    @RequestMapping(method=RequestMethod.GET,name="speak")

    publicStringspeak(@RequestParam(value="body",required=false)Stringbody){

    if(body==null||body==""){

    return"helloworld";

    }

    return"speak"+body;

    }

    }

  • 启动类启用Eureka客户端

    在启动类中,增加 @EnableDiscoveryClient 注解,声明这是一个 Eureka 客户端,代码如下:

    package org.lixue.webservices.services;

       

    import org.springframework.boot.SpringApplication;

    import org.springframework.boot.autoconfigure.SpringBootApplication;

    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

       

    @SpringBootApplication

    @EnableDiscoveryClient

    publicclassServiceProviderApplication{

    publicstaticvoidmain(String[]args){

    SpringApplication.run(ServiceProviderApplication.class,args);

    }

    }

  • 基本配置

    在 src/main/resources 目录中,创建 application.yml 文件,该文件为 Spring Cloud 的配置文件,增加基本配置:

    #配置应用名称

    spring:

    application:

    name:helloworld-provider

    #服务端口

    server:

    port:8080

    #设置eureka服务注册中心的地址,如果多个以逗号分割

    eureka:

    client:

    service-url:

    #defaultZone表示默认的区域的eureka服务地址,多个使用逗号分割

    defaultZone:http://localhost:9000/eureka/

  • 启动项目

    运行项目,访问地址 http://localhost:9000 即可打开 Eureka 注册中心的服务控制台,在 instance currently registered with Eureka 中可以看到我们的服务提供者

原文地址:https://www.cnblogs.com/li3807/p/8676363.html