CookieValue (Spring Framework 4.3.30.RELEASE API)

```
@Target(PARAMETER)
@Retention(RUNTIME)
@Documented
public @interface CookieValue
```
Annotation which indicates that a method parameter should be bound to an HTTP cookie.
Supported for annotated handler methods in Servlet and Portlet environments.
The method parameter may be declared as type Cookie or as cookie value type (String, int, etc.).
从以下版本开始:
3.0
作者:
Juergen Hoeller, Sam Brannen
另请参阅:
RequestMapping, RequestParam, RequestHeader, RequestMapping, RequestMappingHandlerAdapter, AnnotationMethodHandlerAdapter, AnnotationMethodHandlerAdapter

可选元素概要

可选元素
修饰符和类型	可选元素	说明
`String`	`defaultValue`	The default value to use as a fallback.
`String`	`name`	The name of the cookie to bind to.
`boolean`	`required`	Whether the cookie is required.
`String`	`value`	Alias for `name()`.

- 元素详细资料
  - value
```
@AliasFor("name")
String value
```
    Alias for name().
    默认值:
    ""
- - name
```
@AliasFor("value")
String name
```
    The name of the cookie to bind to.
    从以下版本开始:
    4.2
    默认值:
    ""
- - required
```
boolean required
```
    Whether the cookie is required.
    Defaults to true, leading to an exception being thrown if the cookie is missing in the request. Switch this to false if you prefer a null value if the cookie is not present in the request.
    Alternatively, provide a defaultValue(), which implicitly sets this flag to false.
    默认值:
    true
- - defaultValue
```
String defaultValue
```
    The default value to use as a fallback.
    Supplying a default value implicitly sets required() to false.
    默认值:
    "\n\t\t\n\t\t\n\ue000\ue001\ue002\n\t\t\t\t\n"