| Package | Description | 
|---|---|
| org.springframework.core.env | Spring's environment abstraction consisting of bean definition
 profile and hierarchical property source support. | 
| org.springframework.core.io.support | Support classes for Spring's resource abstraction. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | PropertiesPropertySourcePropertySourceimplementation that extracts properties from aPropertiesobject. | 
| class  | SystemEnvironmentPropertySourceSpecialization of  MapPropertySourcedesigned for use with
 system environment variables. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ResourcePropertySourceSubclass of  PropertiesPropertySourcethat loads aPropertiesobject
 from a givenResourceor resource location such as"classpath:/com/myco/foo.properties"or"file:/path/to/file.xml". |