Spring Http ----HttpHeaders类

HttpHeaders类：是一个Map(MultiValueMap )

/**
* 1.定义了所有httpHead字段名
* 2.httpHead信息是一个MultiValueMap
*/
public class HttpHeaders implements MultiValueMap, Serializable {

  /**
    * The HTTP {@code Accept} header field name.
    */
   public static final String ACCEPT = "Accept";
   /**
    * The HTTP {@code Accept-Charset} header field name.
    */
   public static final String ACCEPT_CHARSET = "Accept-Charset";
 
}