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: 7070

spring:

  application:

    name: provider-eureka

eureka:

  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 {

    @Autowired

    private 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: 7000

spring:

  application:

    name: consumer-eureka

eureka:

  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 {

    @Autowired

    private 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

    @Bean

    public 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;

    @Autowired

    public 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);

    }

    @Autowired

    private HelloController2 helloController2;

    @Autowired

    private 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

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