[configuration related]

One [email protected]&@ImportResource&@Bean

@PropertySource： Load the specified configuration file ;
@ImportResource： Import Spring Configuration file for , Let the content in the configuration file take effect ;
SpringBoot Recommended ways to add components to a container ; It is recommended to use full annotation
1、 Configuration class @Configuration------>Spring The configuration file 2、 Use @Bean Add components to the container

Two . Profile

1、 many Profile file
When we write the main configuration file , The filename can be application-{profile}.properties/yml
By default application.properties Configuration of ;
2、yml Support multi document block mode
active: prod // Activate assignment profile

server:
  port: 8081
spring:
  profiles:
    active: prod
---
server:
  port: 8083
spring:
  profiles: dev
---
server:
  port: 8084
spring:
  profiles: prod

3、 Activate assignment profile
①、 Specified in the configuration file spring.profiles.active=dev
②、 Command line ：
java -jar spring-boot-02-config-0.0.1-SNAPSHOT.jar --spring.profiles.active=dev;
You can test it directly , Configure the incoming command line parameters
③、 Virtual machine parameters ;
-Dspring.profiles.active=dev

3、 ... and . Configuration file loading location

springboot Startup will scan the following locations application.properties perhaps application.yml File as Spring boot Default configuration file
–file:./config/
–file:./
–classpath:/config/
–classpath:/
Priority from high to low , High priority configuration overrides low priority configuration ;
SpringBoot The main configuration file will be loaded from all four locations ; Complementary configuration ;

Four . External configuration loading order

SpringBoot You can also load the configuration from ; Priority from high to low ; The high priority configuration covers the low priority configuration , All configurations form complementary configurations
Spring Boot Support multiple external configuration modes
The priority of these methods is as follows ：
https://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#boot-features-external-config

5、 ... and . Auto configuration principle

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