@ -12,7 +12,7 @@ Properties are considered in the following order (with values from lower items o
. {spring-framework-api}/context/annotation/PropertySource.html[`@PropertySource`] annotations on your `@Configuration` classes.
Please note that such property sources are not added to the `Environment` until the application context is being refreshed.
This is too late to configure certain properties such as `+logging.*+` and `+spring.main.*+` which are read before refresh begins.
. Config data (such as `application.properties` files)
. Config data (such as `application.properties` files).
. A `RandomValuePropertySource` that has properties only in `+random.*+`.
. OS environment variables.
. Java System properties (`System.getProperties()`).
@ -56,7 +56,7 @@ See the "<<actuator#actuator.endpoints, Production ready features>>" section for
[[features.external-config.command-line-args]]
=== Accessing Command Line Properties
By default, `SpringApplication` converts any command line option arguments (that is, arguments starting with `--`, such as `--server.port=9000`) to a `property` and adds them to the Spring `Environment`.
As mentioned previously, command line properties always take precedence over filebased property sources.
As mentioned previously, command line properties always take precedence over file-based property sources.
If you do not want command line properties to be added to the `Environment`, you can disable them by using `SpringApplication.setAddCommandLineProperties(false)`.
@ -668,11 +668,11 @@ The preceding POJO defines the following properties:
* `my.service.enabled`, with a value of `false` by default.
* `my.service.remote-address`, with a type that can be coerced from `String`.
* `my.service.security.username`, with a nested "security" object whose name is determined by the name of the property.
In particular, the return type is not used at all there and could have been `SecurityProperties`.
In particular, the type is not used at all there and could have been `SecurityProperties`.
* `my.service.security.password`.
* `my.service.security.roles`, with a collection of `String` that defaults to `USER`.
NOTE: The properties that map to `@ConfigurationProperties` classes available in Spring Boot, which are configured via properties files, YAML files, environment variables etc., are public API but the accessors (getters/setters) of the class itself are not meant to be used directly.
NOTE: The properties that map to `@ConfigurationProperties` classes available in Spring Boot, which are configured via properties files, YAML files, environment variables, etc., are public API but the accessors (getters/setters) of the class itself are not meant to be used directly.
@ -274,7 +274,7 @@ You can configure global devtools settings by adding any of the following files
. `spring-boot-devtools.yaml`
. `spring-boot-devtools.yml`
Any properties added to these file apply to _all_ Spring Boot applications on your machine that use devtools.
Any properties added to these files apply to _all_ Spring Boot applications on your machine that use devtools.
For example, to configure restart to always use a <<using#using.devtools.restart.triggerfile, trigger file>>, you would add the following property to your `spring-boot-devtools` file:
@ -4,7 +4,7 @@ You are free to use any of the standard Spring Framework techniques to define yo
We generally recommend using constructor injection to wire up dependencies and `@ComponentScan` to find beans.
If you structure your code as suggested above (locating your application class in a top package), you can add `@ComponentScan` without any arguments or use the `@SpringBootApplication` annotation which implicitly includes it.
All of your application components (`@Component`, `@Service`, `@Repository`, `@Controller` etc.) are automatically registered as Spring Beans.
All of your application components (`@Component`, `@Service`, `@Repository`, `@Controller`, etc.) are automatically registered as Spring Beans.
The following example shows a `@Service` Bean that uses constructor injection to obtain a required `RiskAssessor` bean:
@ -443,7 +443,7 @@ To do so, set the `spring.security.filter.dispatcher-types` property to `async,
[[web.servlet.spring-mvc.cors]]
==== CORS Support
https://en.wikipedia.org/wiki/Cross-origin_resource_sharing[Cross-origin resource sharing] (CORS) is a https://www.w3.org/TR/cors/[W3C specification] implemented by https://caniuse.com/#feat=cors[most browsers] that lets you specify in a flexible way what kind of cross-domain requests are authorized., instead of using some less secure and less powerful approaches such as IFRAME or JSONP.
https://en.wikipedia.org/wiki/Cross-origin_resource_sharing[Cross-origin resource sharing] (CORS) is a https://www.w3.org/TR/cors/[W3C specification] implemented by https://caniuse.com/#feat=cors[most browsers] that lets you specify in a flexible way what kind of cross-domain requests are authorized, instead of using some less secure and less powerful approaches such as IFRAME or JSONP.
As of version 4.2, Spring MVC {spring-framework-docs}/web.html#mvc-cors[supports CORS].
Using {spring-framework-docs}/web.html#mvc-cors-controller[controller method CORS configuration] with {spring-framework-api}/web/bind/annotation/CrossOrigin.html[`@CrossOrigin`] annotations in your Spring Boot application does not require any specific configuration.