1.开发环境
java:17
springboot:2.7.5
springcloud:2021.0.4
springcloudalibaba:2021.0.4.0
2.maven依赖
<properties>
<java.version>17</java.version>
<spring-cloud-alibaba.version>2021.0.4.0</spring-cloud-alibaba.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring-cloud-alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement><build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
3.application.properties配置参数
server.port=9010
spring.application.name=ts-1
spring.cloud.nacos.config.group=DEFAULT_GROUP
spring.cloud.nacos.config.server-addr=10.21.10.8:8848
spring.config.import=optional:nacos:test.yml
4.编写nacos参数读取类
package com.example.kc1.config;
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
@ConfigurationProperties(prefix = "configdata.user")
public class UserConfig {
private String name;
private Integer age;
}5.nacos上新增test.yml配置文件，格式yaml
configdata:
user:
age: 21
name: freeman
6.启动类添加注解
@SpringBootApplication
@ConfigurationPropertiesScan("com.example.kc1.config")
public class Kc1Application {
public static void main(String[] args) {
SpringApplication.run(Kc1Application.class, args);
}
}7.使用
@RestController
@RequiredArgsConstructor
public class NacosController {
private final UserConfig userConfig;
@GetMapping("/user")
public ResponseEntity getUser(){
return ResponseEntity.ok("hi,"+userConfig.getName());
}
}参考文献：
Configuration Metadata
https://www.baeldung.com/configuration-properties-in-spring-boot
https://github.com/alibaba/spring-cloud-alibaba/tree/2021.x/spring-cloud-alibaba-examples/nacos-example/nacos-config-2.4.x-example