@ConfigurationProperties (spring-boot the dependent), @ Value (spring-beans under dependent), @ PropertySource (spring-context dependent case)
@ConfigurationProperties use
get and set methods have to write
test
@Value use
Do not write to get and set methods
@PropertySource use
@PropertySouce used to reference a custom .properties properties file
Can be combined @ConfigurationProperties use, also you need to write the get and set methods
Can also be combined @Value use, no need to write the same get and set methods
