SpringCloud alibaba 2.1.X (三) nacos1.X 配置中心客户端 (配置动态刷新命名空间配置多环境配置)

落日映苍穹つ 2023-06-21 07:16 15阅读 0赞

# 1.nacos安装 #

请参考 : [docker 安装 nacos 1.X][docker _ nacos 1.X]

# 2.项目父工程 #

请参考 : [SpringCloud H系列 alibaba 2.1.1 (一) nacos1.X 注册中心 服务端][SpringCloud H_ alibaba 2.1.1 _ nacos1.X _]

# 3.项目结构 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70][]

# 4.创建配置中心客户端子工程 #

pom.xml  工程文件

<parent>
            <groupId>com.alibaba</groupId>
            <artifactId>spring-cloud-hoxton</artifactId>
            <version>1.0</version>
        </parent>
        <artifactId>alibaba-nacos-config-client</artifactId>
        <version>1.0</version>
        <packaging>jar</packaging>
    
    
        <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>
        </dependencies>

在nacos web管理端创建 application-nacos.yml 配置文件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 2][]

指定端口号为 8000

bootstrap.yml  是优先级比 application.yml 高一档的配置文件 springboot 会优先读取

TestApplication.java  启动类

@SpringBootApplication
    public class TestApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(TestApplication.class, args);
        }
    
    }

TestController.java  测试接口 读取nacos中的配置文件中的端口号并返回

@Slf4j
    @RestController
    @RefreshScope // nacos 配置自动刷新
    public class TestController {
        // 从 nacos 获取端口号
        @Value("${server.port:}")
        private String port;
    
        @GetMapping("/test")
        public String test() {
            return "端口:"+port;
        }
    
    }

启动应用查看端口是否为nacos 中所配置的8000

![20191211161436359.png][]

访问测试接口读取配置文件中的端口

![20191211161514836.png][]

简单配置成功

这时更改 nacos 配置文件中的 端口为 9000

查看文件是否会动态刷新

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 3][]

刷新测试接口查看内容是否改变

![20191211162910915.png][]

动态刷新成功(虽然配置文件改成了9000,但项目启动时已经指定为8000,所以需要重启应用,方可生效)

# 5.命名空间 与 多环境配置 #

创建新命名空间 dev 记住命名空间ID

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 4][]

在 dev 空间下 创建 application-nacos-dev.yml  开发环境配置文件  与  application-nacos-prod.yml  正式环境配置文件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 5][]

application-nacos-dev.yml 配置端口为 8002

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 6][]

application-nacos-prod.yml 配置端口为 8012

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 7][]

修改 bootstrap.yml 配置 增加 多环境指定 与 命名空间ID

spring:
      application:
        # 应用名称
        name: alibaba-nacos-config-client
      cloud:
        nacos:
          config:
            # 配置中心地址
            server-addr: 192.168.1.141:8848
            # 文件后缀
            file-extension: yml
            # 文件前缀
            prefix: application-nacos
            # 命名空间ID
            namespace: 21c7d9a6-4b92-4313-b28b-7ba5a9328902
      profiles:
        # 环境指定为dev
        active: dev
        # 环境指定为prod
    #    active: prod

指定 环境为dev 启动应用查看 端口是否为 8002

![20191211162522641.png][]

指定 环境为prod 启动应用查看 端口是否为 8012

![20191211162551966.png][]

项目已上传到gitee

地址: [spring-cloud-alibaba-H-demo][]

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[docker _ nacos 1.X]: https://blog.csdn.net/weixin_40461281/article/details/103380530
[SpringCloud H_ alibaba 2.1.1 _ nacos1.X _]: https://blog.csdn.net/weixin_40461281/article/details/103384273
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[20191211161436359.png]: https://img-blog.csdnimg.cn/20191211161436359.png
[20191211161514836.png]: https://img-blog.csdnimg.cn/20191211161514836.png
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[20191211162910915.png]: https://img-blog.csdnimg.cn/20191211162910915.png
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[20191211162522641.png]: https://img-blog.csdnimg.cn/20191211162522641.png
[20191211162551966.png]: https://img-blog.csdnimg.cn/20191211162551966.png
[spring-cloud-alibaba-H-demo]: https://gitee.com/JavaLionLi/spring-cloud-alibaba-H-demo