SpringCloudAlibaba【三】SpringBoot整合Nacos Config

背景

前面，我们将网店的微服务注册到了Nacos，并实现了服务的注册与集群搭建，下面我们来看看SpringBoot如何整合Nacos Config的

环境

Windows10
JDK1.8
IDEA2021
Maven2.6
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下载安装Nacos

Windows安装Nacos

搭建Maven项目

IDEA中创建一个新的Maven工程，项目目录如下

项目文件配置

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>org.example</groupId>
    <artifactId>nacos-config</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <!--add-->

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.2.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--nacos-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.5.RELEASE</version>
                <scope>import</scope>
                <type>pom</type>
            </dependency>
        </dependencies>
    </dependencyManagement>

</project>
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YML

spring:
  application:
    name: nacos-config
  cloud:
    nacos:
      config:
        server-addr: localhost:8848
        file-extension: yml
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NacosConfigApplication

package com.nacos;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class NacosConfigApplication {

    public static void main(String[] args) {
        SpringApplication.run(NacosConfigApplication.class);
    }

}

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NacosConfigController

package com.nacos.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RefreshScope
public class NacosConfigController {

    @Value("${str}")
    private String str;

    @GetMapping("/")
    public String getConfig() {
        return str;
    }

}

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测试Nacos动态配置

启动服务，查看Nacos

注：spring.application.name要和Data Id一致

编辑配置文件

浏览器输入接口地址

修改配置文件，不重启服务，即可动态获取配置信息，自测