Nacos概述：
全称Dynamic Naming and Configuration Service，是一个Nacos，全称Dynamic Naming and Configuration Service，是一个易于构建云原生应用的动态服务发现、配置管理和服务管理平台。其核心功能主要包括服务发现、健康检查、动态配置服务和动态DNS服务等。这些特性使得微服务的发现、管理、共享和组合更加容易。
具体来说，Nacos支持基于DNS和RPC的服务发现，可以实时检查服务的健康状态，实现动态配置服务，并提供了动态DNS服务等特性。此外，Nacos还与Spring Cloud Alibaba紧密集成，可以作为注册中心，实现服务的注册与发现。
官网：Releases · alibaba/nacos (github.com)
第一步：安装Nacos
这里，我就用Windows版本。
解压缩即可。
当然nacos也是用java写的，我们也可以直接运行这个jar包
是不是特别像springboot的配置文件。
第二步：启动nacos
startup.cmd -m standalone
当然，我这个是改了端口号的，我改回去即可。
正常运行（没改的情况下）的是8848端口号。
启动成功。访问Nacos
http://localhost:8848/nacos/#/login
默认用户名和密码都是nacos
第三步：配置管理
新建配置
然后发布即可
JavaSdk拉取配置
第一步：新建项目
pom文件
<dependencies><dependency><groupId>com.alibaba.nacos</groupId><artifactId>nacos-client</artifactId><version>2.2.1</version></dependency><dependency><groupId>com.google.sitebricks</groupId><artifactId>slf4j</artifactId><version>0.8.3</version></dependency></dependencies>第二步：编写代码
package org.cyl;import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.exception.NacosException;import java.util.Properties;public class Main {public static void main(String[] args) {try {String serverAddr="localhost:8848";String dataId="test";String group="DEFAULT_GROUP";Properties properties=new Properties();properties.put("serverAddr",serverAddr);ConfigService configService = NacosFactory.createConfigService(properties);String config = configService.getConfig(dataId, group, 5000);System.out.println(config);} catch (NacosException e) {throw new RuntimeException(e);}}
}第三步：运行结果
JavaSdk监听配置
第一步：编写代码
package org.cyl;import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.listener.Listener;
import com.alibaba.nacos.api.exception.NacosException;import java.io.IOException;
import java.util.Properties;
import java.util.concurrent.Executor;public class Main {public static void main(String[] args) {try {String serverAddr="localhost:8848";String dataId="test";String group="DEFAULT_GROUP";Properties properties=new Properties();properties.put("serverAddr",serverAddr);ConfigService configService = NacosFactory.createConfigService(properties);String config = configService.getConfig(dataId, group, 5000);System.out.println(config);configService.addListener(dataId, group, new Listener() {@Overridepublic Executor getExecutor() {return null;}@Overridepublic void receiveConfigInfo(String s) {System.out.println(s);}});System.in.read();} catch (NacosException e) {throw new RuntimeException(e);} catch (IOException e) {throw new RuntimeException(e);}}
}第二步：运行项目并修改nacos配置文件
之后看结果，已经监测到了：
Spring拉取配置
第一步：创建项目
pom文件
<?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.cyl</groupId><artifactId>test07</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><version>2.6.13</version></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId><version>2022.0.0.0-RC2</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId><version>2.6.13</version></dependency><dependency><groupId>com.google.sitebricks</groupId><artifactId>slf4j</artifactId><version>0.8.3</version></dependency><dependency><groupId>com.alibaba.nacos</groupId><artifactId>nacos-spring-context</artifactId><version>1.1.1</version></dependency></dependencies></project>MyApplication类
package org.cyl;import com.alibaba.nacos.api.annotation.NacosProperties;
import com.alibaba.nacos.spring.context.annotation.config.EnableNacosConfig;
import com.alibaba.nacos.spring.context.annotation.config.NacosPropertySource;
import org.cyl.service.MyService;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;@ComponentScan
@Configuration
@EnableNacosConfig(globalProperties = @NacosProperties(serverAddr = "127.0.0.1:8848"))
@NacosPropertySource(dataId = "test",autoRefreshed = true)
public class MyApplication {public static void main(String[] args) {AnnotationConfigApplicationContext annotationConfigApplicationContext=new AnnotationConfigApplicationContext(MyApplication.class);MyService myService = annotationConfigApplicationContext.getBean(MyService.class);myService.test();}
}
MyService类
package org.cyl.service;import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;@Component
public class MyService {@Value("${password}")public String username;public void test(){System.out.println(username);}
}
第二步：查看运行结果
Springboot拉取配置
pom文件
<?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.cyl</groupId><artifactId>test07</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><version>2.6.13</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId><version>2.6.13</version></dependency><dependency><groupId>com.google.sitebricks</groupId><artifactId>slf4j</artifactId><version>0.8.3</version></dependency><dependency><groupId>com.alibaba.boot</groupId><artifactId>nacos-config-spring-boot-starter</artifactId><version>0.2.12</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.15.3</version></dependency></dependencies></project>MyApplication类
package org.cyl;
import com.alibaba.nacos.spring.context.annotation.config.NacosPropertySource;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
@NacosPropertySource(dataId = "test",autoRefreshed = true)
public class MyApplication {public static void main(String[] args) {SpringApplication.run(MyApplication.class,args);}
}
application.properties
nacos.config.server-addr=127.0.0.1:8848
注意：如果想要全部写在properties里面应该这样写：
nacos.config.server-addr=127.0.0.1:8848
nacos.config.data-id=test
nacos.config.auto-refresh=true
nacos.config.bootstrap.enable=trueController
package org.cyl.controller;import com.alibaba.nacos.api.config.annotation.NacosValue;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
public class UserController {@NacosValue(value = "${password}",autoRefreshed = true)public String password;@GetMapping("/")public String test(){return password;}
}
第二步：运行结果，查看
SpringCloud拉取项目
注意：有的版本是会直接读取bootstrap.properties里面
算了，我还是直接写一个微服务系列吧
