SpringCloud2020版本配置与环境搭建教程详解
1、maven父子工程搭建
项目使用maven工程搭建,下面是工程的结构图。SpringCloud2020是父工程,仅负责依赖的管理,eureka是注册中心的服务端,testclient是测试的客户端。
1.1 父工程pom
<?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>org.example</groupId> <artifactId>SpringCloud2020</artifactId> <packaging>pom</packaging> <version>1.0-SNAPSHOT</version> <modules> <module>eureka</module> <module>testclient</module> </modules> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.4.1</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> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <!-- Provide the latest stable Spring Cloud release train version (e.g. 2020.0.0) --> <version>2020.0.0</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>
1.2 eureka子工程pom
<?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"> <parent> <artifactId>SpringCloud2020</artifactId> <groupId>org.example</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>eureka</artifactId> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> </dependencies> </project>
1.3 testclient子工程pom
<?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"> <parent> <artifactId>SpringCloud2020</artifactId> <groupId>org.example</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>testclient</artifactId> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <!--引入WebStart--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies> </project>
2、配置application
2.1 eureka 配置
server: port: 20001 #eureka运行的端口号 address: 127.0.0.1 #注册中心运行地址 servlet: context-path: /server #eureka注册中心管理界面地址 eureka: client: register-with-eureka: false #是否加入eureka注册表 fetch-registry: false #还是向eureka请求注册信息表 service-url: defaultZone: http://${server.address}:${server.port}/eureka #注册中心地址,其它服务需要注册到该地址
2.1 testclient 配置
server: port: 20002 # Spring spring: application: name: test_service # Eureka eureka: client: service-url: defaultZone: http://127.0.0.1:20001/eureka #这里的port与eureka的端口对应 instance: lease-renewal-interval-in-seconds: 5 # 每隔5秒发送一次心跳 lease-expiration-duration-in-seconds: 10 # 10秒不发送就过期 prefer-ip-address: true instance-id: ${spring.application.name}:${server.port}
3、启动类
3.1 Eureka启动类EurekaApplication
package org.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @SpringBootApplication @EnableEurekaServer public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } }
3.2 TestClient启动类TestClientApplication
package org.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @SpringBootApplication @EnableEurekaClient public class TestClientApplication { public static void main(String[] args) { SpringApplication.run(TestClientApplication.class, args); } }
4、运行结果
如果没有意外,那么你将看到
如果启动testclient时报错
请检查testclient工程的依赖中是否存在下面的依赖项,如果没有,请添加。原因可能是eureka-client依赖spring-boot-starter-web
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>
如果没有出现TEST_SERVICE,并且testclient出现以下报错
请检查testclient配置的defaultZone是否与eureka配置对应,并清空已经构建的内容,再重新启动eureka,testclient。
在testclient控制台看到以下日志信息,说明注册成功。
访问管理界面默认使用127.0.0.1:port
,如果要改变它,请按照下面的提示配置
server: port: 20001 #eureka运行的端口号 address: 127.0.0.1 #管理界面的地址 servlet: context-path: /eureka-ui#管理界面的context-path eureka: client: register-with-eureka: false #是否加入eureka注册表 fetch-registry: false #是否向eureka请求注册信息表 service-url: defaultZone: http://127.0.0.1:${server.port}/eureka # 配置注册中心的地址,其它服务注册的时候使用。
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