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: yaml
        username: ${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;
    }
}