在本章中，将详细了解如何将Spring Boot Micro服务应用程序注册到Eureka Server中。 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(https://www.yiibai.com/spring-boot/spring_boot_eureka_server.html )。
首先，需要在构建配置文件中添加以下依赖项，以便向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 文件中 -
compile('org.springframework.cloud:spring-cloud-starter-eureka')
现在，在主Spring Boot应用程序类文件中添加@EnableEurekaClient注解。 @EnableEurekaClient注解用于指示Spring Boot应用程序充当Eureka客户端。
Spring Boot主应用程序如下所示 -
package com.yiibai.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，需要在application.properties 文件或application.yml 文件中添加以下配置，并在配置中指定Eureka Server URL。
application.yml 文件的代码如下 -
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka
instance:
preferIpAddress: true
spring:
application:
name: eurekaclient
application.properties 文件的代码如下 -
eureka.client.serviceUrl.defaultZone = http://localhost:8761/eureka
eureka.client.instance.preferIpAddress = true
spring.application.name = eurekaclient
现在，添加Rest Endpoint以在Spring Boot应用程序中返回String，并在构建配置文件中返回Spring Boot Starter Web依赖项。如下给出的代码 -
package com.yiibai.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。
Maven构建文件 - pom.xml 的内容如下:
<?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.yiibai</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>