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Nacos配置中心使用（Spring Cloud版）

news 2025/8/8 0:55:34

目标

向项目中集成Nacos配置。原项目是一个SpringBoot项目。这里假设我们无法修改原有项目的SpringBoot版本。

注意

在不动SpringBoot版本的前提下，根据SpringBoot的版本，确定Spring Cloud和Nacos版本。Nacos版本其实就是Spring Cloud Alibaba版本。在Nacos的文档里面有一个表格，确定应该使用的Nacos具体版本。

例如：我这里使用的是SpringBoot2.6.3，这应该使用Spring Cloud Alibaba2021.0.1.0版本。如果你使用的SpringBoot版本没有在Nacos官方文档里面出现，那就选一个与你使用的SpringBoot版本接近的Nacos版本吧。

步骤

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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.6.3</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>cn.com.xxx</groupId><artifactId>xxxx</artifactId><version>0.0.1-SNAPSHOT</version><name>xxx</name><description>xxxx project for Spring Boot</description><properties><java.version>1.8</java.version><spring-cloud.version>2021.0.1</spring-cloud.version><spring-cloud-alibaba.version>2021.0.1.0</spring-cloud-alibaba.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--配置中心 nacos--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId><version>${spring-cloud-alibaba.version}</version></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId><version>${spring-cloud-alibaba.version}</version></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-bootstrap</artifactId></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement>
</project>

bootstrap.yml

spring:application:name: myapp#nacos组件cloud:nacos:discovery:# 服务注册地址server-addr: ${NACOS_URL:https://xxx.xxxx.com.cn}namespace: ${NACOS_NAME_SPACE:123412437-2343-423d-sdads3-zw3r3}username: ${NACOS_NAME:xxx}password: ${NACOS_PASS:xxx}group: ${SPRING_PROFILES_ACTIVE:dev}config:# 配置中心地址server-addr: ${NACOS_URL:https://xxxx.xxxx.com.cn}namespace: ${NACOS_NAME_SPACE:123412437-2343-423d-sdads3-zw3r3}file-extension: yamlusername: ${NACOS_NAME:sss}password: ${NACOS_PASS:xxxx}group: ${SPRING_PROFILES_ACTIVE:dev}
server:port: 8080

HelloController.java

@RefreshScope
@RestController
@RequestMapping("/hello")
public class HelloController {@Value("${useLocalCache:false}")private boolean useLocalCache;@RequestMapping("/nacos/get")public boolean get() {return useLocalCache;}
}