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() {
@Override
public Executor getExecutor() {
return null;
}
@Override
public 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=true
Controller
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