spring CookieValue 源码
spring CookieValue 代码
文件路径：/spring-web/src/main/java/org/springframework/web/bind/annotation/CookieValue.java
/*
* Copyright 2002-2021 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.bind.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.core.annotation.AliasFor;
/**
* Annotation to indicate that a method parameter is bound to an HTTP cookie.
*
* <p>The method parameter may be declared as type {@link jakarta.servlet.http.Cookie}
* or as cookie value type (String, int, etc.).
*
* <p>Note that with spring-webmvc 5.3.x and earlier, the cookie value is URL
* decoded. This will be changed in 6.0 but in the meantime, applications can
* also declare parameters of type {@link jakarta.servlet.http.Cookie} to access
* the raw value.
*
* @author Juergen Hoeller
* @author Sam Brannen
* @since 3.0
* @see RequestMapping
* @see RequestParam
* @see RequestHeader
* @see org.springframework.web.bind.annotation.RequestMapping
*/
@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface CookieValue {
/**
* Alias for {@link #name}.
*/
@AliasFor("name")
String value() default "";
/**
* The name of the cookie to bind to.
* @since 4.2
*/
@AliasFor("value")
String name() default "";
/**
* Whether the cookie is required.
* <p>Defaults to {@code true}, leading to an exception being thrown
* if the cookie is missing in the request. Switch this to
* {@code false} if you prefer a {@code null} value if the cookie is
* not present in the request.
* <p>Alternatively, provide a {@link #defaultValue}, which implicitly
* sets this flag to {@code false}.
*/
boolean required() default true;
/**
* The default value to use as a fallback.
* <p>Supplying a default value implicitly sets {@link #required} to
* {@code false}.
*/
String defaultValue() default ValueConstants.DEFAULT_NONE;
}
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