SpringCloud + Eureka / Nacos

git：https://github.com/huanmsf/springCloudLearn.git

项目目录:

父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>spring.cloud.learn</groupId><artifactId>sc-learn</artifactId><packaging>pom</packaging><version>1.0-SNAPSHOT</version><modules><module>api</module><module>consumer-eureka</module><module>consumer-nacos</module><module>provider-eureka</module><module>provider-nacos</module><module>eureka-server</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><spring-boot.version>2.0.4.RELEASE</spring-boot.version><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target></properties><dependencyManagement><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>${spring-boot.version}</version><type>pom</type><scope>import</scope></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId><version>0.2.1.RELEASE</version></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId><version>0.2.1.RELEASE</version></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-server</artifactId><version>2.1.1.RELEASE</version></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</artifactId><version>2.0.0.RELEASE</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><version>2.0.3.RELEASE</version></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId><version>2.1.1.RELEASE</version></dependency></dependencies></dependencyManagement><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

基于Eureka的服务注册和发现 provider-eureka

目录

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><parent><groupId>spring.cloud.learn</groupId><artifactId>sc-learn</artifactId><version>1.0-SNAPSHOT</version><relativePath>../pom.xml</relativePath></parent><groupId>sc.learn.provider.eureka</groupId><artifactId>provider-eureka</artifactId><version>0.0.1-SNAPSHOT</version><name>provider-eureka</name><description>Demo project for Spring Boot</description><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>spring.cloud.learn.api</groupId><artifactId>api</artifactId><version>1.0-SNAPSHOT</version><scope>compile</scope></dependency><dependency><groupId>spring.cloud.learn.api</groupId><artifactId>api</artifactId><version>2.1.4.RELEASE</version><scope>compile</scope></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</artifactId></dependency></dependencies></project>

application.yml

server:port: 7070spring:application:name: provider-eurekaeureka:client:serviceUrl:defaultZone: http://localhost:8888/eureka/

ProviderEurekaApplication

@SpringBootApplication
@EnableEurekaClient
public class ProviderEurekaApplication {public static void main(String[] args) {SpringApplication.run(ProviderEurekaApplication.class, args);}}

EchoServiceController

@RestController
@RequestMapping("/pe")
public class EchoServiceController {@Autowiredprivate EchoService echoService;@GetMapping("/echo")public String echo(@RequestParam String name) {return echoService.echo(name);}
}

结果

基于Eureka的服务注册和发现 consumer-eureka

目录

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><parent><groupId>spring.cloud.learn</groupId><artifactId>sc-learn</artifactId><version>1.0-SNAPSHOT</version><relativePath>../pom.xml</relativePath></parent><groupId>sc.learn.consumer.eureka</groupId><artifactId>consumer-eureka</artifactId><version>0.0.1-SNAPSHOT</version><name>consumer-eureka</name><description>Demo project for Spring Boot</description><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><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><dependency><groupId>spring.cloud.learn.api</groupId><artifactId>api</artifactId><version>1.0-SNAPSHOT</version><scope>compile</scope></dependency><dependency><groupId>spring.cloud.learn.api</groupId><artifactId>api</artifactId><version>2.1.4.RELEASE</version><scope>compile</scope></dependency></dependencies></project>

application.yml

server:port: 7000spring:application:name: consumer-eurekaeureka:client:serviceUrl:defaultZone: http://localhost:8888/eureka/

ConsumerEurekaApplication

@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
@EnableDiscoveryClient
public class ConsumerEurekaApplication {public static void main(String[] args) {SpringApplication.run(ConsumerEurekaApplication.class, args);}}

InvokeEchoServiceController

@RestController
@RequestMapping("/ce")
public class InvokeEchoServiceController {@Autowiredprivate HelloController helloController;@GetMapping("/echo")public String echo(@RequestParam String name) {return helloController.hello(name);}}

HelloController

@FeignClient(value = "provider-eureka")
public interface HelloController {@GetMapping("/pe/echo")String hello(@RequestParam(value = "name") String name);
}

结果

基于Nacos的服务注册和发现和配置中心 provider-nacos

目录

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><parent><groupId>spring.cloud.learn</groupId><artifactId>sc-learn</artifactId><version>1.0-SNAPSHOT</version><relativePath>../pom.xml</relativePath></parent><groupId>sc.learn.provider.nacos</groupId><artifactId>provider-nacos</artifactId><version>0.0.1-SNAPSHOT</version><name>provider-nacos</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.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-alibaba-nacos-discovery</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId></dependency></dependencies></project>

bootstrap.properties

spring.application.name=provider-nacos
server.port=9090
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
spring.cloud.nacos.config.server-addr=127.0.0.1:8848

application.properties 空着,配置中心只能写在bootstrap.properties中,不然报错

ProviderNacosApplication

@SpringBootApplication
@EnableDiscoveryClient
public class ProviderNacosApplication {public static void main(String[] args) {SpringApplication.run(ProviderNacosApplication.class, args);}}

EchoController

@RestController
@RequestMapping("/pn")
@RefreshScope
public class EchoController {@Value("${sys.user.name:null}")private String user;@GetMapping(value = "/hello")public String hello(@RequestParam String name) {return user + "Hello : " + name;}@GetMapping(value = "/echo")public String echo(@RequestParam String name) {return user + "Echo : " + name;}
}

结果

基于Nacos的服务注册和发现和配置中心 consumer-nacos

目录

bootstrap.properties

server.port=9000
spring.application.name=consumer-nacos
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
spring.cloud.nacos.config.server-addr=127.0.0.1:8848

ConsumerNacosApplication

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class ConsumerNacosApplication {@LoadBalanced@Beanpublic RestTemplate restTemplate() {return new RestTemplate();}public static void main(String[] args) {SpringApplication.run(ConsumerNacosApplication.class, args);}}

EchoControllerCn

@RestController
@RequestMapping("/cn")
@RefreshScope
public class EchoControllerCn {private final RestTemplate restTemplate;@Value("${sys.user.name:null}")private String user;@Autowiredpublic EchoControllerCn(RestTemplate restTemplate) {this.restTemplate = restTemplate;}@GetMapping(value = "/hello")public String echo(@RequestParam String name) {return restTemplate.getForObject("http://nacos-provider/pn/hello?name=" + name, String.class);}@Autowiredprivate HelloController2 helloController2;@Autowiredprivate HelloController helloController1;@GetMapping(value = "/hello1")public String echo1(String name) {return user + helloController1.hello(name);}@GetMapping(value = "/hello2")public String echo2(String name) {return user + helloController2.hello(name);}
}

HelloController

@FeignClient(value = "provider-nacos")
public interface HelloController {@GetMapping("/pn/hello")String hello(@RequestParam(value = "name") String name);}

结果

Nacos 服务器

nacos多环境配置

参考：https://www.cnblogs.com/didispace/p/10340685.html#undefined

修改配置文件

nacos.config-dev.properties:

sys.user.name=user-dev

nacos.config-test.properties:

sys.user.name=user-test

指定配置文件前缀

spring.cloud.nacos.config.prefix=nacos.config

添加启动参数

-Dspring.profiles.active=test

结果：

Nacos配置