在本章中,您将详细了解如何将Spring Boot Micro服务应用程序注册到Eureka Server.在注册应用程序之前,请确保Eureka Server在端口8761上运行或首先构建Eureka Server并运行它.有关构建Eureka服务器的更多信息,请参阅上一章.
首先,您需要在我们的构建配置文件中添加以下依赖项,以便使用Eureka服务器注册微服务.
Maven用户可以将以下依赖项添加到 pom.xml 文件中 :
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency>
Gradle用户可以将以下依赖项添加到 build.gradle 文件 :
compile('org.springframework.cloud:spring-cloud-starter-eureka')
现在,我们需要在主Spring Boot应用程序类文件中添加@EnableEurekaClient批注. @EnableEurekaClient注释使您的Spring Boot应用程序充当Eureka客户端.
主要的Spring Boot应用程序如下所示 :
package com.it1352.eurekaclient; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @SpringBootApplication @EnableEurekaClient public class EurekaclientApplication { public static void main(String[] args) { SpringApplication.run(EurekaclientApplication.class, args); } }
要将Spring Boot应用程序注册到Eureka Server,我们需要在application.properties文件中添加以下配置或者application.yml文件并在我们的配置中指定Eureka Server URL.
application.yml文件的代码在下面给出 :
eureka: client: serviceUrl: defaultZone: http://localhost:8761/eureka instance: preferIpAddress: true spring: application: name: eurekaclient
application.properties文件的代码在下面和下面给出;
eureka.client.serviceUrl.defaultZone = http://localhost:8761/eureka eureka.client.instance.preferIpAddress = true spring.application.name = eurekaclient
现在,在主Spring Boot应用程序中添加Rest Endpoint以返回String和构建配置文件中的Spring Boot Starter Web依赖项.观察下面给出的代码 :
package com.it1352.eurekaclient; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @SpringBootApplication @EnableEurekaClient @RestController public class EurekaclientApplication { public static void main(String[] args) { SpringApplication.run(EurekaclientApplication.class, args); } @RequestMapping(value = "/") public String home() { return "Eureka Client application"; } }
整个配置文件如下:
对于Maven用户 - 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.IT屋</groupId> <artifactId>eurekaclient</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>eurekaclient</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.9.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>Edgware.RELEASE</spring-cloud.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>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </projecta>
对于Gradle用户 - build.gradle
buildscript { ext { springBootVersion = '1.5.9.RELEASE' } repositories { mavenCentral() } dependencies { classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}") } } apply plugin: 'java' apply plugin: 'eclipse' apply plugin: 'org.springframework.boot' group = 'com.IT屋' version = '0.0.1-SNAPSHOT' sourceCompatibility = 1.8 repositories { mavenCentral() } ext { springCloudVersion = 'Edgware.RELEASE' } dependencies { compile('org.springframework.cloud:spring-cloud-starter-eureka') testCompile('org.springframework.boot:spring-boot-starter-test') compile('org.springframework.boot:spring-boot-starter-web') } dependencyManagement { imports { mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}" } }
您可以创建一个可执行的JAR文件,并使用以下Maven或Gradle命令运行Spring Boot应用程序 :
For Maven ,你可以使用以下命令 :
mvn clean install
在"BUILD SUCCESS"之后,您可以在目标目录下找到JAR文件.
对于Gradle,您可以使用以下命令 :
gradle clean build
在"BUILD SUCCESSFUL"之后,你可以在build/libs目录下找到JAR文件.
现在,使用如下所示的命令运行JAR文件 :
java –jar <JARFILE>
现在,应用程序已在Tomcat端口8080上启动,Eureka Client应用程序已在Eureka Server上注册,如下所示 :
点击URL http://localhost:8761/在你的网页浏览器,您可以看到Eureka客户端应用程序已在Eureka Server注册.
现在在网络浏览器中点击URL http://localhost:8080/并查看Rest Endpoint输出.