nacos在spring cloud环境中的使用

-- 有空再补充

先说结果，需要验证过程的可参看后面的代码和配置再次验证

• 1、nacos可同时加载多个配置，共享配置 spring.cloud.nacos.config.shared-configs 以数组的形式添加配置；
• 2、nacos配置生效的优先级。nacos加载的配置当中，由配置 spring.cloud.nacos.config.name 指定的配置为最高优先级，共享配置 spring.cloud.nacos.config.​​​​​​​shared-configs 当中配置的的加载按照添加的顺序加载，即相同的配置项，顺序靠后的覆盖顺序靠前的。

引入nacos依赖

        
            com.alibaba.cloud
            spring-cloud-starter-alibaba-nacos-config
            2.0.4.RELEASE
        

添加启动配置

spring:
  cloud:
    nacos:
      config:
        server-addr: 127.0.0.1:8848
        namespace: ee601b91-4269-4452-bd5f-5010e78b69d8
        name: nacos_service
        group: dev_nacos
        file-extension: yaml
        shared-configs:
          - data-id: mysql.yaml
            group: dev_nacos
            refresh: true
          - data-id: priority.yaml
            group: dev_nacos
            refresh: true

nacos配置内容

nacos_service.yaml：

service:
  name: nacos_service_test
config:
  priority: 1

mysql.yaml

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:336/nacos?characterEncoding=utf8
    username: root
    password: 123456

config:
  priority: 2
  priority2: 2

priority.yaml

config:
  priority: 3
  priority2: 3

接口代码

ConfigController.java

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

    @Value(value = "${service.name}")
    private String serviceName;
    @Value(value = "${spring.datasource.url}")
    private String dataSourceUrl;
    @Value(value = "${spring.datasource.username}")
    private String dataSourceUsername;
    @Value(value = "${spring.datasource.password}")
    private String dataSourcePassword;
    @Value(value = "${config.priority}")
    private Integer configPriority;
    @Value(value = "${config.priority2}")
    private Integer configPriority2;

    @GetMapping(value = "/get",produces = "application/json")
    public String get() {
        return toString();
    }

    @Override
    public String toString() {
        return "{" +
                ""serviceName": "" + serviceName + '"' +
                ", "dataSourceUrl": "" + dataSourceUrl + '"' +
                ", "dataSourceUsername": "" + dataSourceUsername + '"' +
                ", "dataSourcePassword": "" + dataSourcePassword + '"' +
                ", "configPriority": " + configPriority +
                ", "configPriority2": " + configPriority2 +
                "}";
    }
}

工程启动后，接口返回的结果