| Package | Description | 
|---|---|
| org.springframework.boot.context.properties | Support for external configuration properties. | 
| org.springframework.boot.context.properties.bind | Support for  @ConfigurationPropertiesbinding. | 
| org.springframework.boot.context.properties.bind.handler | General  BindHandlerimplementations. | 
| org.springframework.boot.context.properties.bind.validation | Binding validation support. | 
| Class and Description | 
|---|
| BindHandler Callback interface that can be used to handle additional logic during element
  binding. | 
| Class and Description | 
|---|
| Bindable Source that can be bound by a  Binder. | 
| BindContext Context information for use by  BindHandlers. | 
| Binder A container object which Binds objects from one or more
  ConfigurationPropertySources. | 
| BindHandler Callback interface that can be used to handle additional logic during element
  binding. | 
| BindResult A container object to return the result of a  Binderbind operation. | 
| PlaceholdersResolver Optional strategy that used by a  Binderto resolve property placeholders. | 
| Class and Description | 
|---|
| AbstractBindHandler Abstract base class for  BindHandlerimplementations. | 
| Bindable Source that can be bound by a  Binder. | 
| BindContext Context information for use by  BindHandlers. | 
| BindHandler Callback interface that can be used to handle additional logic during element
  binding. | 
| Class and Description | 
|---|
| AbstractBindHandler Abstract base class for  BindHandlerimplementations. | 
| Bindable Source that can be bound by a  Binder. | 
| BindContext Context information for use by  BindHandlers. | 
| BindHandler Callback interface that can be used to handle additional logic during element
  binding. | 
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