spring RequestBody 源码
spring RequestBody 代码
文件路径：/spring-web/src/main/java/org/springframework/web/bind/annotation/RequestBody.java
/*
* Copyright 2002-2018 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.http.converter.HttpMessageConverter;
/**
* Annotation indicating a method parameter should be bound to the body of the web request.
* The body of the request is passed through an {@link HttpMessageConverter} to resolve the
* method argument depending on the content type of the request. Optionally, automatic
* validation can be applied by annotating the argument with {@code @Valid}.
*
* <p>Supported for annotated handler methods.
*
* @author Arjen Poutsma
* @since 3.0
* @see RequestHeader
* @see ResponseBody
* @see org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter
*/
@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface RequestBody {
/**
* Whether body content is required.
* <p>Default is {@code true}, leading to an exception thrown in case
* there is no body content. Switch this to {@code false} if you prefer
* {@code null} to be passed when the body content is {@code null}.
* @since 3.2
*/
boolean required() default true;
}
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