nacos-springboot配置中心使用-蒲公英云

nacos-springboot配置中心使用

先启动nacos服务

案例如下：

结合springboot，application.properties配置：

nacos.config.server-addr=127.0.0.1:8848

endpoint http://localhost:8080/actuator/nacos-config
health http://localhost:8080/actuator/health
management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always

pom配置：

2.0.3.RELEASE

0.2.1

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>${spring-boot.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
        <version>${spring-boot.version}</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba.boot</groupId>
        <artifactId>nacos-config-spring-boot-starter</artifactId>
        <version>${nacos-config-spring-boot.version}</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba.boot</groupId>
        <artifactId>nacos-config-spring-boot-actuator</artifactId>
        <version>${nacos-config-spring-boot.version}</version>
    </dependency>
</dependencies>

启动主类：NacosConfigApplication.java

@SpringBootApplication
@NacosPropertySource(dataId = “example”, autoRefreshed = true)
public class NacosConfigApplication {
```
public static void main(String[] args) {
    SpringApplication.run(NacosConfigApplication.class, args);
}
```
}

测试demo：ConfigController.java

import com.alibaba.nacos.api.annotation.NacosInjected;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.annotation.NacosValue;
import com.alibaba.nacos.api.exception.NacosException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import static org.springframework.web.bind.annotation.RequestMethod.GET;

@Controller
@RequestMapping(“config”)
public class ConfigController {

private static final Logger log = LoggerFactory.getLogger(ConfigController.class);
@NacosInjected
ConfigService configService;
@NacosValue(value = "${useLocalCache:xxx}", autoRefreshed = true)
private String useLocalCache;
@RequestMapping(value = "/get", method = GET)
@ResponseBody
public String get() {
// http://localhost:8080/config/get
    return useLocalCache;
}
@RequestMapping(value = "/publish", method = GET)
@ResponseBody
public String doPublish() {
// http://localhost:8080/config/publish
    try {
        log.info("原始值{}", configService.getConfig("example", "DEFAULT_GROUP", 20000));
        configService.publishConfig("example", "DEFAULT_GROUP", "useLocalCache=api更改");
        log.info("更改后的值{}", configService.getConfig("example", "DEFAULT_GROUP", 20000));
        return "SUCESS";
    } catch (NacosException e) {
        e.printStackTrace();
        return "FALSE";
    }
}

此时我们访问http://localhost:8080/config/get，得到的值是默认值：xxx
自定义配置，登陆nacos控制台//127.0.0.1:8848/nacos/
在配置列表中，打开dateId为example的配置，编辑。如果没有这个dateId，就点击“+”，自行添加

添加配置：
useLocalCache=ssss

再次访问http://localhost:8080/config/get，得到结果：ssss，配置实时生效。