SessionAttributeStore (Spring Framework 4.3.30.RELEASE API)

所有已知实现类:
DefaultSessionAttributeStore
```
public interface SessionAttributeStore
```
Strategy interface for storing model attributes in a backend session.
从以下版本开始:
2.5
作者:
Juergen Hoeller
另请参阅:
SessionAttributes

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`void`	`cleanupAttribute(WebRequest request, String attributeName)`	Clean up the specified attribute in the backend session.
`Object`	`retrieveAttribute(WebRequest request, String attributeName)`	Retrieve the specified attribute from the backend session.
`void`	`storeAttribute(WebRequest request, String attributeName, Object attributeValue)`	Store the supplied attribute in the backend session.

- 方法详细资料
  - storeAttribute
```
void storeAttribute(WebRequest request,
                    String attributeName,
                    Object attributeValue)
```
    Store the supplied attribute in the backend session.
    Can be called for new attributes as well as for existing attributes. In the latter case, this signals that the attribute value may have been modified.
    参数:
    request - the current request
    attributeName - the name of the attribute
    attributeValue - the attribute value to store
  - retrieveAttribute
```
Object retrieveAttribute(WebRequest request,
                         String attributeName)
```
    Retrieve the specified attribute from the backend session.
    This will typically be called with the expectation that the attribute is already present, with an exception to be thrown if this method returns null.
    参数:
    request - the current request
    attributeName - the name of the attribute
    返回:
    the current attribute value, or null if none
  - cleanupAttribute
```
void cleanupAttribute(WebRequest request,
                      String attributeName)
```
    Clean up the specified attribute in the backend session.
    Indicates that the attribute name will not be used anymore.
    参数:
    request - the current request
    attributeName - the name of the attribute