Nacos 2.0.1 Spring Cloud 2020.0.2 项目快速启用配置服务

nacos server 安装

参考Linux 下部署 nacos 1.4，此处需要安装nacos 2.0.1

环境说明

依赖	版本
spring boot	2.4.5
spring cloud	2020.0.2
Spring Cloud Alibaba	2021.1
nacos server	2.0.1

添加POM依赖

	<properties>
		<alibaba.cloud.version>2021.1</alibaba.cloud.version>
		<nacos.client.version>2.0.1</nacos.client.version>
	</properties>
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>com.alibaba.cloud</groupId>
				<artifactId>spring-cloud-alibaba-dependencies</artifactId>
				<version>${alibaba.cloud.version}</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<dependencies>
	    <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.alibaba.nacos</groupId>
                    <artifactId>nacos-client</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
	    <dependency>
			<groupId>com.alibaba.nacos</groupId>
			<artifactId>nacos-client</artifactId>
			<version>${nacos.client.version}</version>
		</dependency>
	    <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
        </dependency>
	</dependencies>

bootstrap.properties 添加如下配置

spring.cloud.nacos.config.server-addr=127.0.0.1:8848
# Nacos 控制台添加配置：
# Data ID：spring-cloud-legends-nacos-example.properties
# Group：DEFAULT_GROUP
# 配置内容：useLocalCache=true
spring.application.name=spring-cloud-legends-nacos-example
# 指定配置的后缀，支持 properties、yaml、yml，默认为 properties
spring.cloud.nacos.config.file-extension=properties
#spring.cloud.nacos.config.file-extension=yaml

nacos 控制台中添加配置

nacos 控制台点击创建

新建配置

• Data ID：spring-cloud-legends-nacos-example.properties
• Group：DEFAULT_GROUP
• 配置内容：useLocalCache=true

测试代码

@RestController
@RequestMapping("/config")
@RefreshScope
public class ConfigController {

    @Value("${useLocalCache:false}")
    private boolean useLocalCache;

    /**
     * http://localhost:8080/config/get
     */
    @RequestMapping("/get")
    public boolean get() {
        return useLocalCache;
    }
}

测试验证

注意

• Spring Cloud Alibaba 2021.1 默认nacos client 为1.4.1，需要配置nacos client 2.01，否则读取不到配置
• 需在bootstrap.properties 中配置spring.main.allow-bean-definition-overriding=true
• 需依赖 spring-cloud-starter-bootstrap，否则读取不到bootstrap 中配置

 <dependency>
     <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-bootstrap</artifactId>
   </dependency>

源码地址

https://github.com/herionZhang/nacos-config-test