本篇主要介绍Eureka 实现服务的发现与注册,所有内容全部来自于互联网,仅供参考

1 创建parent工程

新建maven工程,配置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.could.shj</groupId>
    <artifactId>parent-clould</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/>
    </parent>

    <modules>
        <module>eureka-server</module>
        <module>eureka-client</module>
    </modules>

    <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.RELEASE</spring-cloud.version>
    </properties>

    <dependencies>
        <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>

请注意

<modules>
    <module>eureka-server</module>
    <module>eureka-client</module>
</modules>

分别代表着两个模块

2 创建服务注册中心 eureka-server

右键项目,在新建中选择模块,

选择 spring initialir

然后输入相关信息

然后选择下图内容

创建完成之后配置其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.clould.shj</groupId>
	<artifactId>eureka-server</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>eureka-server</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>com.could.shj</groupId>
		<artifactId>parent-clould</artifactId>
		<version>1.0-SNAPSHOT</version>
	</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.RELEASE</spring-cloud.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
		</dependency>


	</dependencies>




</project>

配置启动文件的注解

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {

	public static void main(String[] args) {
		SpringApplication.run(EurekaServerApplication.class, args);
	}
}

配置application.properties

server.port=8761
eureka.instance.hostname=127.0.0.1
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/
spring.application.name=eureka-server

然后可以启动项目

然后在浏览器中输入 http://127.0.0.1:8761/

3 创建服务提供者 eureka-client

当client向server注册时，它会提供一些元数据，例如主机和端口，URL，主页等

Eureka server 从每个client实例接收心跳消息。如果心跳超时，则通常将该实例从注册server中删除。

创建步骤参考server 的创建,创建完成之后,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.could.shj</groupId>
	<artifactId>eureka-client</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>eureka-client</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>com.could.shj</groupId>
		<artifactId>parent-clould</artifactId>
		<version>1.0-SNAPSHOT</version>
	</parent>



	<dependencies>
		<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-web</artifactId>
		</dependency>
	</dependencies>



	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>

然后在启动类中增加注解

@SpringBootApplication
@EnableEurekaClient
@RestController
public class EurekaClientApplication {

	public static void main(String[] args) {

		SpringApplication.run(EurekaClientApplication.class, args);
	}

	@Value("${server.port}")
	String port;

	@RequestMapping("/hello")
	public String home(@RequestParam(value = "name", defaultValue = "shj") String name) {
		return "hello " + name + " ,i am from port:" + port;
	}

}

配置application.properties

server.port=8762
spring.application.name=eureka-client
eureka.client.service-url.defaultZone=http://127.0.0.1:8761/eureka/

然后启动项目

刷新http://127.0.0.1:8761/

此时在浏览器中输入: http://127.0.0.1:8762/hello

springcloud ( 1 Eureka的使用 )

1 创建parent工程

请注意

2 创建服务注册中心 eureka-server

3 创建服务提供者 eureka-client

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