Java17 --- SpringCloud之Nacos

一、下载nacos并运行

1.1、创建9001微服务作为提供者

1.2、创建80微服务作为消费者

二、naocs配置中心规则与动态刷新

2.1、创建3377微服务

2.2、在nacos中创建配置文件

三、nacos数据模型之Namespace-Group-Datald

3.1、DatalD方案

3.2、Group方案

3.3、Namespace方案

一、下载nacos并运行

下载官网：Nacos官网 | Nacos 官方社区 | Nacos 下载 | Nacos

运行并测试访问：startup.cmd -m standalone

1.1、创建9001微服务作为提供者

导入相关pom依赖并创建配置yml文件

<dependencies><!--nacos-discovery--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!--loadbalancer--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-loadbalancer</artifactId></dependency><!--web + actuator--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--lombok--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>

server:port: 9001spring:application:name: nacos-payment-providercloud:nacos:discovery:server-addr: localhost:8848 #配置Nacos地址

测试代码：

@SpringBootApplication
@EnableDiscoveryClient
public class Main9001 {public static void main(String[] args) {SpringApplication.run(Main9001.class,args);}
}

@RestController
public class PayAlibabaController {@Value("${server.port}")private String serverPort;@GetMapping(value = "/pay/nacos/{id}")public String getPayInfo(@PathVariable("id") Integer id){return "nacos registry, serverPort: "+ serverPort+"\t id"+id;}
}

1.2、创建80微服务作为消费者

导入相关pom依赖并创建配置yml文件

<dependencies><!--nacos-discovery--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!--loadbalancer--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-loadbalancer</artifactId></dependency><!--web + actuator--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--lombok--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>

server:port: 80spring:application:name: nacos-order-consumercloud:nacos:discovery:server-addr: localhost:8848
#消费者将要去访问的微服务名称(nacos微服务提供者叫什么你写什么)
service-url:nacos-user-service: http://nacos-payment-provider

测试代码：

@SpringBootApplication
@EnableDiscoveryClient
public class Main80 {public static void main(String[] args) {SpringApplication.run(Main80.class,args);}
}

@Configuration
public class RestTemplateConfig {@Bean@LoadBalanced //赋予RestTemplate负载均衡的能力public RestTemplate restTemplate(){return new RestTemplate();}
}

@RestController
public class OrderNacosController {@Resourceprivate RestTemplate restTemplate;@Value("${service-url.nacos-user-service}")private String serverURL;@GetMapping("/consumer/pay/nacos/{id}")public String paymentInfo(@PathVariable("id") Integer id){String result = restTemplate.getForObject(serverURL + "/pay/nacos/" + id, String.class);return result+"\t"+"    我是OrderNacosController80调用者。。。。。。";}
}

二、naocs配置中心规则与动态刷新

2.1、创建3377微服务

    <dependencies><!--bootstrap--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-bootstrap</artifactId></dependency><!--nacos-config--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId></dependency><!--nacos-discovery--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!--web + actuator--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--lombok--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>

创建配置文件bootstrap.yml

# nacos配置
spring:application:name: nacos-config-clientcloud:nacos:discovery:server-addr: localhost:8848 #Nacos服务注册中心地址config:server-addr: localhost:8848 #Nacos作为配置中心地址file-extension: yaml #指定yaml格式的配置# nacos端配置文件DataId的命名规则是：
# ${spring.application.name}-${spring.profile.active}.${spring.cloud.nacos.config.file-extension}
# 本案例的DataID是:nacos-config-client-dev.yaml

创建配置文件application.yml

server:port: 3377spring:profiles:active: dev # 表示开发环境#active: prod # 表示生产环境#active: test # 表示测试环境

测试代码：

@SpringBootApplication
@EnableDiscoveryClient
public class Main3377 {public static void main(String[] args) {SpringApplication.run(Main3377.class,args);}
}

@RestController
@RefreshScope //动态刷新
public class NacosConfigClientController {@Value("${config.info}")private String configInfo;@GetMapping("/config/info")public String getConfigInfo() {return configInfo;}
}