java.lang.Object
- org.springframework.http.HttpHeaders

所有已实现的接口:
Serializable, Map<String,List<String>>, MultiValueMap<String,String>
直接已知子类:
WebSocketHttpHeaders
```
public class HttpHeaders
extends Object
implements MultiValueMap<String,String>, Serializable
```
A data structure representing HTTP request or response headers, mapping String header names to a list of String values, also offering accessors for common application-level data types.
In addition to the regular methods defined by Map, this class offers many common convenience methods, for example:
- getFirst(String) returns the first value associated with a given header name
- add(String, String) adds a header value to the list of values for a header name
- set(String, String) sets the header value to a single string value
Note that HttpHeaders generally treats header names in a case-insensitive manner.
从以下版本开始:
3.0
作者:
Arjen Poutsma, Sebastien Deleuze, Brian Clozel, Juergen Hoeller, Josh Long, Sam Brannen
另请参阅:
序列化表格

嵌套类概要
- 从接口继承的嵌套类/接口 java.util.Map
  Map.Entry<K extends Object,V extends Object>

字段概要

字段
修饰符和类型	字段	说明
`static String`	`ACCEPT`	The HTTP `Accept` header field name.
`static String`	`ACCEPT_CHARSET`	The HTTP `Accept-Charset` header field name.
`static String`	`ACCEPT_ENCODING`	The HTTP `Accept-Encoding` header field name.
`static String`	`ACCEPT_LANGUAGE`	The HTTP `Accept-Language` header field name.
`static String`	`ACCEPT_RANGES`	The HTTP `Accept-Ranges` header field name.
`static String`	`ACCESS_CONTROL_ALLOW_CREDENTIALS`	The CORS `Access-Control-Allow-Credentials` response header field name.
`static String`	`ACCESS_CONTROL_ALLOW_HEADERS`	The CORS `Access-Control-Allow-Headers` response header field name.
`static String`	`ACCESS_CONTROL_ALLOW_METHODS`	The CORS `Access-Control-Allow-Methods` response header field name.
`static String`	`ACCESS_CONTROL_ALLOW_ORIGIN`	The CORS `Access-Control-Allow-Origin` response header field name.
`static String`	`ACCESS_CONTROL_EXPOSE_HEADERS`	The CORS `Access-Control-Expose-Headers` response header field name.
`static String`	`ACCESS_CONTROL_MAX_AGE`	The CORS `Access-Control-Max-Age` response header field name.
`static String`	`ACCESS_CONTROL_REQUEST_HEADERS`	The CORS `Access-Control-Request-Headers` request header field name.
`static String`	`ACCESS_CONTROL_REQUEST_METHOD`	The CORS `Access-Control-Request-Method` request header field name.
`static String`	`AGE`	The HTTP `Age` header field name.
`static String`	`ALLOW`	The HTTP `Allow` header field name.
`static String`	`AUTHORIZATION`	The HTTP `Authorization` header field name.
`static String`	`CACHE_CONTROL`	The HTTP `Cache-Control` header field name.
`static String`	`CONNECTION`	The HTTP `Connection` header field name.
`static String`	`CONTENT_DISPOSITION`	The HTTP `Content-Disposition` header field name.
`static String`	`CONTENT_ENCODING`	The HTTP `Content-Encoding` header field name.
`static String`	`CONTENT_LANGUAGE`	The HTTP `Content-Language` header field name.
`static String`	`CONTENT_LENGTH`	The HTTP `Content-Length` header field name.
`static String`	`CONTENT_LOCATION`	The HTTP `Content-Location` header field name.
`static String`	`CONTENT_RANGE`	The HTTP `Content-Range` header field name.
`static String`	`CONTENT_TYPE`	The HTTP `Content-Type` header field name.
`static String`	`COOKIE`	The HTTP `Cookie` header field name.
`static String`	`DATE`	The HTTP `Date` header field name.
`static HttpHeaders`	`EMPTY`	An empty `HttpHeaders` instance (immutable).
`static String`	`ETAG`	The HTTP `ETag` header field name.
`static String`	`EXPECT`	The HTTP `Expect` header field name.
`static String`	`EXPIRES`	The HTTP `Expires` header field name.
`static String`	`FROM`	The HTTP `From` header field name.
`static String`	`HOST`	The HTTP `Host` header field name.
`static String`	`IF_MATCH`	The HTTP `If-Match` header field name.
`static String`	`IF_MODIFIED_SINCE`	The HTTP `If-Modified-Since` header field name.
`static String`	`IF_NONE_MATCH`	The HTTP `If-None-Match` header field name.
`static String`	`IF_RANGE`	The HTTP `If-Range` header field name.
`static String`	`IF_UNMODIFIED_SINCE`	The HTTP `If-Unmodified-Since` header field name.
`static String`	`LAST_MODIFIED`	The HTTP `Last-Modified` header field name.
`static String`	`LINK`	The HTTP `Link` header field name.
`static String`	`LOCATION`	The HTTP `Location` header field name.
`static String`	`MAX_FORWARDS`	The HTTP `Max-Forwards` header field name.
`static String`	`ORIGIN`	The HTTP `Origin` header field name.
`static String`	`PRAGMA`	The HTTP `Pragma` header field name.
`static String`	`PROXY_AUTHENTICATE`	The HTTP `Proxy-Authenticate` header field name.
`static String`	`PROXY_AUTHORIZATION`	The HTTP `Proxy-Authorization` header field name.
`static String`	`RANGE`	The HTTP `Range` header field name.
`static String`	`REFERER`	The HTTP `Referer` header field name.
`static String`	`RETRY_AFTER`	The HTTP `Retry-After` header field name.
`static String`	`SERVER`	The HTTP `Server` header field name.
`static String`	`SET_COOKIE`	The HTTP `Set-Cookie` header field name.
`static String`	`SET_COOKIE2`	The HTTP `Set-Cookie2` header field name.
`static String`	`TE`	The HTTP `TE` header field name.
`static String`	`TRAILER`	The HTTP `Trailer` header field name.
`static String`	`TRANSFER_ENCODING`	The HTTP `Transfer-Encoding` header field name.
`static String`	`UPGRADE`	The HTTP `Upgrade` header field name.
`static String`	`USER_AGENT`	The HTTP `User-Agent` header field name.
`static String`	`VARY`	The HTTP `Vary` header field name.
`static String`	`VIA`	The HTTP `Via` header field name.
`static String`	`WARNING`	The HTTP `Warning` header field name.
`static String`	`WWW_AUTHENTICATE`	The HTTP `WWW-Authenticate` header field name.

构造器概要

构造器
构造器	说明
`HttpHeaders()`	Construct a new, empty instance of the `HttpHeaders` object.
`HttpHeaders(MultiValueMap<String,String> headers)`	Construct a new `HttpHeaders` instance backed by an existing map.

方法概要

所有方法静态方法实例方法具体方法
修饰符和类型	方法	说明
`void`	`add(String headerName, String headerValue)`	Add the given, single header value under the given name.
`void`	`addAll(String key, List<? extends String> values)`	Add all the values of the given list to the current list of values for the given key.
`void`	`addAll(MultiValueMap<String,String> values)`	Add all the values of the given `MultiValueMap` to the current values.
`void`	`clear()`
`void`	`clearContentHeaders()`	Remove the well-known `"Content-*"` HTTP headers.
`boolean`	`containsKey(Object key)`
`boolean`	`containsValue(Object value)`
`static String`	`encodeBasicAuth(String username, String password, Charset charset)`	Encode the given username and password into Basic Authentication credentials.
`Set<Map.Entry<String,List<String>>>`	`entrySet()`
`boolean`	`equals(Object other)`
`static String`	`formatHeaders(MultiValueMap<String,String> headers)`	Helps to format HTTP header values, as HTTP header values themselves can contain comma-separated values, can become confusing with regular `Map` formatting that also uses commas between entries.
`List<String>`	`get(Object key)`
`List<MediaType>`	`getAccept()`	Return the list of acceptable media types, as specified by the `Accept` header.
`List<Charset>`	`getAcceptCharset()`	Return the list of acceptable charsets, as specified by the `Accept-Charset` header.
`List<Locale.LanguageRange>`	`getAcceptLanguage()`	Return the language ranges from the "Accept-Language" header.
`List<Locale>`	`getAcceptLanguageAsLocales()`	A variant of `getAcceptLanguage()` that converts each `Locale.LanguageRange` to a `Locale`.
`boolean`	`getAccessControlAllowCredentials()`	Return the value of the `Access-Control-Allow-Credentials` response header.
`List<String>`	`getAccessControlAllowHeaders()`	Return the value of the `Access-Control-Allow-Headers` response header.
`List<HttpMethod>`	`getAccessControlAllowMethods()`	Return the value of the `Access-Control-Allow-Methods` response header.
`String`	`getAccessControlAllowOrigin()`	Return the value of the `Access-Control-Allow-Origin` response header.
`List<String>`	`getAccessControlExposeHeaders()`	Return the value of the `Access-Control-Expose-Headers` response header.
`long`	`getAccessControlMaxAge()`	Return the value of the `Access-Control-Max-Age` response header.
`List<String>`	`getAccessControlRequestHeaders()`	Return the value of the `Access-Control-Request-Headers` request header.
`HttpMethod`	`getAccessControlRequestMethod()`	Return the value of the `Access-Control-Request-Method` request header.
`Set<HttpMethod>`	`getAllow()`	Return the set of allowed `HTTP methods`, as specified by the `Allow` header.
`String`	`getCacheControl()`	Return the value of the `Cache-Control` header.
`List<String>`	`getConnection()`	Return the value of the `Connection` header.
`ContentDisposition`	`getContentDisposition()`	Return a parsed representation of the Content-Disposition header.
`Locale`	`getContentLanguage()`	Get the first `Locale` of the content languages, as specified by the `Content-Language` header.
`long`	`getContentLength()`	Return the length of the body in bytes, as specified by the `Content-Length` header.
`MediaType`	`getContentType()`	Return the media type of the body, as specified by the `Content-Type` header.
`long`	`getDate()`	Return the date and time at which the message was created, as specified by the `Date` header.
`String`	`getETag()`	Return the entity tag of the body, as specified by the `ETag` header.
`protected List<String>`	`getETagValuesAsList(String headerName)`	Retrieve a combined result from the field values of the ETag header.
`long`	`getExpires()`	Return the date and time at which the message is no longer valid, as specified by the `Expires` header.
`protected String`	`getFieldValues(String headerName)`	Retrieve a combined result from the field values of multi-valued headers.
`String`	`getFirst(String headerName)`	Return the first header value for the given header name, if any.
`long`	`getFirstDate(String headerName)`	Parse the first header value for the given header name as a date, return -1 if there is no value, or raise `IllegalArgumentException` if the value cannot be parsed as a date.
`ZonedDateTime`	`getFirstZonedDateTime(String headerName)`	Parse the first header value for the given header name as a date, return `null` if there is no value, or raise `IllegalArgumentException` if the value cannot be parsed as a date.
`InetSocketAddress`	`getHost()`	Return the value of the `Host` header, if available.
`List<String>`	`getIfMatch()`	Return the value of the `If-Match` header.
`long`	`getIfModifiedSince()`	Return the value of the `If-Modified-Since` header.
`List<String>`	`getIfNoneMatch()`	Return the value of the `If-None-Match` header.
`long`	`getIfUnmodifiedSince()`	Return the value of the `If-Unmodified-Since` header.
`long`	`getLastModified()`	Return the time the resource was last changed, as specified by the `Last-Modified` header.
`URI`	`getLocation()`	Return the (new) location of a resource as specified by the `Location` header.
`List<String>`	`getOrEmpty(Object headerName)`	Get the list of header values for the given header name, if any.
`String`	`getOrigin()`	Return the value of the `Origin` header.
`String`	`getPragma()`	Return the value of the `Pragma` header.
`List<HttpRange>`	`getRange()`	Return the value of the `Range` header.
`String`	`getUpgrade()`	Return the value of the `Upgrade` header.
`List<String>`	`getValuesAsList(String headerName)`	Return all values of a given header name, even if this header is set multiple times.
`List<String>`	`getVary()`	Return the request header names subject to content negotiation.
`int`	`hashCode()`
`boolean`	`isEmpty()`
`Set<String>`	`keySet()`
`List<String>`	`put(String key, List<String> value)`
`void`	`putAll(Map<? extends String,? extends List<String>> map)`
`static HttpHeaders`	`readOnlyHttpHeaders(HttpHeaders headers)`	Apply a read-only `HttpHeaders` wrapper around the given headers, if necessary.
`List<String>`	`remove(Object key)`
`void`	`set(String headerName, String headerValue)`	Set the given, single header value under the given name.
`void`	`setAccept(List<MediaType> acceptableMediaTypes)`	Set the list of acceptable media types, as specified by the `Accept` header.
`void`	`setAcceptCharset(List<Charset> acceptableCharsets)`	Set the list of acceptable charsets, as specified by the `Accept-Charset` header.
`void`	`setAcceptLanguage(List<Locale.LanguageRange> languages)`	Set the acceptable language ranges, as specified by the Accept-Language header.
`void`	`setAcceptLanguageAsLocales(List<Locale> locales)`	Variant of `setAcceptLanguage(List)` using `Locale`'s.
`void`	`setAccessControlAllowCredentials(boolean allowCredentials)`	Set the (new) value of the `Access-Control-Allow-Credentials` response header.
`void`	`setAccessControlAllowHeaders(List<String> allowedHeaders)`	Set the (new) value of the `Access-Control-Allow-Headers` response header.
`void`	`setAccessControlAllowMethods(List<HttpMethod> allowedMethods)`	Set the (new) value of the `Access-Control-Allow-Methods` response header.
`void`	`setAccessControlAllowOrigin(String allowedOrigin)`	Set the (new) value of the `Access-Control-Allow-Origin` response header.
`void`	`setAccessControlExposeHeaders(List<String> exposedHeaders)`	Set the (new) value of the `Access-Control-Expose-Headers` response header.
`void`	`setAccessControlMaxAge(long maxAge)`	Set the (new) value of the `Access-Control-Max-Age` response header.
`void`	`setAccessControlMaxAge(Duration maxAge)`	Set the (new) value of the `Access-Control-Max-Age` response header.
`void`	`setAccessControlRequestHeaders(List<String> requestHeaders)`	Set the (new) value of the `Access-Control-Request-Headers` request header.
`void`	`setAccessControlRequestMethod(HttpMethod requestMethod)`	Set the (new) value of the `Access-Control-Request-Method` request header.
`void`	`setAll(Map<String,String> values)`	Set the given values under.
`void`	`setAllow(Set<HttpMethod> allowedMethods)`	Set the set of allowed `HTTP methods`, as specified by the `Allow` header.
`void`	`setBasicAuth(String encodedCredentials)`	Set the value of the Authorization header to Basic Authentication based on the given encoded credentials.
`void`	`setBasicAuth(String username, String password)`	Set the value of the Authorization header to Basic Authentication based on the given username and password.
`void`	`setBasicAuth(String username, String password, Charset charset)`	Set the value of the Authorization header to Basic Authentication based on the given username and password.
`void`	`setBearerAuth(String token)`	Set the value of the Authorization header to the given Bearer token.
`void`	`setCacheControl(String cacheControl)`	Set the (new) value of the `Cache-Control` header.
`void`	`setCacheControl(CacheControl cacheControl)`	Set a configured `CacheControl` instance as the new value of the `Cache-Control` header.
`void`	`setConnection(String connection)`	Set the (new) value of the `Connection` header.
`void`	`setConnection(List<String> connection)`	Set the (new) value of the `Connection` header.
`void`	`setContentDisposition(ContentDisposition contentDisposition)`	Set the Content-Disposition header.
`void`	`setContentDispositionFormData(String name, String filename)`	Set the `Content-Disposition` header when creating a `"multipart/form-data"` request.
`void`	`setContentLanguage(Locale locale)`	Set the `Locale` of the content language, as specified by the Content-Language header.
`void`	`setContentLength(long contentLength)`	Set the length of the body in bytes, as specified by the `Content-Length` header.
`void`	`setContentType(MediaType mediaType)`	Set the media type of the body, as specified by the `Content-Type` header.
`void`	`setDate(long date)`	Set the date and time at which the message was created, as specified by the `Date` header.
`void`	`setDate(String headerName, long date)`	Set the given date under the given header name after formatting it as a string using the RFC-1123 date-time formatter.
`void`	`setDate(Instant date)`	Set the date and time at which the message was created, as specified by the `Date` header.
`void`	`setDate(ZonedDateTime date)`	Set the date and time at which the message was created, as specified by the `Date` header.
`void`	`setETag(String etag)`	Set the (new) entity tag of the body, as specified by the `ETag` header.
`void`	`setExpires(long expires)`	Set the date and time at which the message is no longer valid, as specified by the `Expires` header.
`void`	`setExpires(Instant expires)`	Set the date and time at which the message is no longer valid, as specified by the `Expires` header.
`void`	`setExpires(ZonedDateTime expires)`	Set the duration after which the message is no longer valid, as specified by the `Expires` header.
`void`	`setHost(InetSocketAddress host)`	Set the (new) value of the `Host` header.
`void`	`setIfMatch(String ifMatch)`	Set the (new) value of the `If-Match` header.
`void`	`setIfMatch(List<String> ifMatchList)`	Set the (new) value of the `If-Match` header.
`void`	`setIfModifiedSince(long ifModifiedSince)`	Set the (new) value of the `If-Modified-Since` header.
`void`	`setIfModifiedSince(Instant ifModifiedSince)`	Set the time the resource was last changed, as specified by the `Last-Modified` header.
`void`	`setIfModifiedSince(ZonedDateTime ifModifiedSince)`	Set the time the resource was last changed, as specified by the `Last-Modified` header.
`void`	`setIfNoneMatch(String ifNoneMatch)`	Set the (new) value of the `If-None-Match` header.
`void`	`setIfNoneMatch(List<String> ifNoneMatchList)`	Set the (new) values of the `If-None-Match` header.
`void`	`setIfUnmodifiedSince(long ifUnmodifiedSince)`	Set the (new) value of the `If-Unmodified-Since` header.
`void`	`setIfUnmodifiedSince(Instant ifUnmodifiedSince)`	Set the time the resource was last changed, as specified by the `Last-Modified` header.
`void`	`setIfUnmodifiedSince(ZonedDateTime ifUnmodifiedSince)`	Set the time the resource was last changed, as specified by the `Last-Modified` header.
`void`	`setInstant(String headerName, Instant date)`	Set the given date under the given header name after formatting it as a string using the RFC-1123 date-time formatter.
`void`	`setLastModified(long lastModified)`	Set the time the resource was last changed, as specified by the `Last-Modified` header.
`void`	`setLastModified(Instant lastModified)`	Set the time the resource was last changed, as specified by the `Last-Modified` header.
`void`	`setLastModified(ZonedDateTime lastModified)`	Set the time the resource was last changed, as specified by the `Last-Modified` header.
`void`	`setLocation(URI location)`	Set the (new) location of a resource, as specified by the `Location` header.
`void`	`setOrigin(String origin)`	Set the (new) value of the `Origin` header.
`void`	`setPragma(String pragma)`	Set the (new) value of the `Pragma` header.
`void`	`setRange(List<HttpRange> ranges)`	Sets the (new) value of the `Range` header.
`void`	`setUpgrade(String upgrade)`	Set the (new) value of the `Upgrade` header.
`void`	`setVary(List<String> requestHeaders)`	Set the request header names (e.g.
`void`	`setZonedDateTime(String headerName, ZonedDateTime date)`	Set the given date under the given header name after formatting it as a string using the RFC-1123 date-time formatter.
`int`	`size()`
`protected String`	`toCommaDelimitedString(List<String> headerValues)`	Turn the given list of header values into a comma-delimited result.
`Map<String,String>`	`toSingleValueMap()`	Return a `Map` with the first values contained in this `MultiValueMap`.
`String`	`toString()`
`Collection<List<String>>`	`values()`
`static HttpHeaders`	`writableHttpHeaders(HttpHeaders headers)`	Remove any read-only wrapper that may have been previously applied around the given headers via `readOnlyHttpHeaders(HttpHeaders)`.

从类继承的方法 java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

从接口继承的方法 java.util.Map
compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

从接口继承的方法 org.springframework.util.MultiValueMap
addIfAbsent

- 字段详细资料
  - ACCEPT
```
public static final String ACCEPT
```
    The HTTP Accept header field name.
    另请参阅:
    Section 5.3.2 of RFC 7231, 常量字段值
  - ACCEPT_CHARSET
```
public static final String ACCEPT_CHARSET
```
    The HTTP Accept-Charset header field name.
    另请参阅:
    Section 5.3.3 of RFC 7231, 常量字段值
  - ACCEPT_ENCODING
```
public static final String ACCEPT_ENCODING
```
    The HTTP Accept-Encoding header field name.
    另请参阅:
    Section 5.3.4 of RFC 7231, 常量字段值
  - ACCEPT_LANGUAGE
```
public static final String ACCEPT_LANGUAGE
```
    The HTTP Accept-Language header field name.
    另请参阅:
    Section 5.3.5 of RFC 7231, 常量字段值
  - ACCEPT_RANGES
```
public static final String ACCEPT_RANGES
```
    The HTTP Accept-Ranges header field name.
    另请参阅:
    Section 5.3.5 of RFC 7233, 常量字段值
  - ACCESS_CONTROL_ALLOW_CREDENTIALS
```
public static final String ACCESS_CONTROL_ALLOW_CREDENTIALS
```
    The CORS Access-Control-Allow-Credentials response header field name.
    另请参阅:
    CORS W3C recommendation, 常量字段值
  - ACCESS_CONTROL_ALLOW_HEADERS
```
public static final String ACCESS_CONTROL_ALLOW_HEADERS
```
    The CORS Access-Control-Allow-Headers response header field name.
    另请参阅:
    CORS W3C recommendation, 常量字段值
  - ACCESS_CONTROL_ALLOW_METHODS
```
public static final String ACCESS_CONTROL_ALLOW_METHODS
```
    The CORS Access-Control-Allow-Methods response header field name.
    另请参阅:
    CORS W3C recommendation, 常量字段值
  - ACCESS_CONTROL_ALLOW_ORIGIN
```
public static final String ACCESS_CONTROL_ALLOW_ORIGIN
```
    The CORS Access-Control-Allow-Origin response header field name.
    另请参阅:
    CORS W3C recommendation, 常量字段值
  - ACCESS_CONTROL_EXPOSE_HEADERS
```
public static final String ACCESS_CONTROL_EXPOSE_HEADERS
```
    The CORS Access-Control-Expose-Headers response header field name.
    另请参阅:
    CORS W3C recommendation, 常量字段值
  - ACCESS_CONTROL_MAX_AGE
```
public static final String ACCESS_CONTROL_MAX_AGE
```
    The CORS Access-Control-Max-Age response header field name.
    另请参阅:
    CORS W3C recommendation, 常量字段值
  - ACCESS_CONTROL_REQUEST_HEADERS
```
public static final String ACCESS_CONTROL_REQUEST_HEADERS
```
    The CORS Access-Control-Request-Headers request header field name.
    另请参阅:
    CORS W3C recommendation, 常量字段值
  - ACCESS_CONTROL_REQUEST_METHOD
```
public static final String ACCESS_CONTROL_REQUEST_METHOD
```
    The CORS Access-Control-Request-Method request header field name.
    另请参阅:
    CORS W3C recommendation, 常量字段值
  - AGE
```
public static final String AGE
```
    The HTTP Age header field name.
    另请参阅:
    Section 5.1 of RFC 7234, 常量字段值
  - ALLOW
```
public static final String ALLOW
```
    The HTTP Allow header field name.
    另请参阅:
    Section 7.4.1 of RFC 7231, 常量字段值
  - AUTHORIZATION
```
public static final String AUTHORIZATION
```
    The HTTP Authorization header field name.
    另请参阅:
    Section 4.2 of RFC 7235, 常量字段值
  - CACHE_CONTROL
```
public static final String CACHE_CONTROL
```
    The HTTP Cache-Control header field name.
    另请参阅:
    Section 5.2 of RFC 7234, 常量字段值
  - CONNECTION
```
public static final String CONNECTION
```
    The HTTP Connection header field name.
    另请参阅:
    Section 6.1 of RFC 7230, 常量字段值
  - CONTENT_ENCODING
```
public static final String CONTENT_ENCODING
```
    The HTTP Content-Encoding header field name.
    另请参阅:
    Section 3.1.2.2 of RFC 7231, 常量字段值
  - CONTENT_DISPOSITION
```
public static final String CONTENT_DISPOSITION
```
    The HTTP Content-Disposition header field name.
    另请参阅:
    RFC 6266, 常量字段值
  - CONTENT_LANGUAGE
```
public static final String CONTENT_LANGUAGE
```
    The HTTP Content-Language header field name.
    另请参阅:
    Section 3.1.3.2 of RFC 7231, 常量字段值
  - CONTENT_LENGTH
```
public static final String CONTENT_LENGTH
```
    The HTTP Content-Length header field name.
    另请参阅:
    Section 3.3.2 of RFC 7230, 常量字段值
  - CONTENT_LOCATION
```
public static final String CONTENT_LOCATION
```
    The HTTP Content-Location header field name.
    另请参阅:
    Section 3.1.4.2 of RFC 7231, 常量字段值
  - CONTENT_RANGE
```
public static final String CONTENT_RANGE
```
    The HTTP Content-Range header field name.
    另请参阅:
    Section 4.2 of RFC 7233, 常量字段值
  - CONTENT_TYPE
```
public static final String CONTENT_TYPE
```
    The HTTP Content-Type header field name.
    另请参阅:
    Section 3.1.1.5 of RFC 7231, 常量字段值
  - COOKIE
```
public static final String COOKIE
```
    The HTTP Cookie header field name.
    另请参阅:
    Section 4.3.4 of RFC 2109, 常量字段值
  - DATE
```
public static final String DATE
```
    The HTTP Date header field name.
    另请参阅:
    Section 7.1.1.2 of RFC 7231, 常量字段值
  - ETAG
```
public static final String ETAG
```
    The HTTP ETag header field name.
    另请参阅:
    Section 2.3 of RFC 7232, 常量字段值
  - EXPECT
```
public static final String EXPECT
```
    The HTTP Expect header field name.
    另请参阅:
    Section 5.1.1 of RFC 7231, 常量字段值
  - EXPIRES
```
public static final String EXPIRES
```
    The HTTP Expires header field name.
    另请参阅:
    Section 5.3 of RFC 7234, 常量字段值
  - FROM
```
public static final String FROM
```
    The HTTP From header field name.
    另请参阅:
    Section 5.5.1 of RFC 7231, 常量字段值
  - HOST
```
public static final String HOST
```
    The HTTP Host header field name.
    另请参阅:
    Section 5.4 of RFC 7230, 常量字段值
  - IF_MATCH
```
public static final String IF_MATCH
```
    The HTTP If-Match header field name.
    另请参阅:
    Section 3.1 of RFC 7232, 常量字段值
  - IF_MODIFIED_SINCE
```
public static final String IF_MODIFIED_SINCE
```
    The HTTP If-Modified-Since header field name.
    另请参阅:
    Section 3.3 of RFC 7232, 常量字段值
  - IF_NONE_MATCH
```
public static final String IF_NONE_MATCH
```
    The HTTP If-None-Match header field name.
    另请参阅:
    Section 3.2 of RFC 7232, 常量字段值
  - IF_RANGE
```
public static final String IF_RANGE
```
    The HTTP If-Range header field name.
    另请参阅:
    Section 3.2 of RFC 7233, 常量字段值
  - IF_UNMODIFIED_SINCE
```
public static final String IF_UNMODIFIED_SINCE
```
    The HTTP If-Unmodified-Since header field name.
    另请参阅:
    Section 3.4 of RFC 7232, 常量字段值
  - LAST_MODIFIED
```
public static final String LAST_MODIFIED
```
    The HTTP Last-Modified header field name.
    另请参阅:
    Section 2.2 of RFC 7232, 常量字段值
  - LINK
```
public static final String LINK
```
    The HTTP Link header field name.
    另请参阅:
    RFC 5988, 常量字段值
  - LOCATION
```
public static final String LOCATION
```
    The HTTP Location header field name.
    另请参阅:
    Section 7.1.2 of RFC 7231, 常量字段值
  - MAX_FORWARDS
```
public static final String MAX_FORWARDS
```
    The HTTP Max-Forwards header field name.
    另请参阅:
    Section 5.1.2 of RFC 7231, 常量字段值
  - ORIGIN
```
public static final String ORIGIN
```
    The HTTP Origin header field name.
    另请参阅:
    RFC 6454, 常量字段值
  - PRAGMA
```
public static final String PRAGMA
```
    The HTTP Pragma header field name.
    另请参阅:
    Section 5.4 of RFC 7234, 常量字段值
  - PROXY_AUTHENTICATE
```
public static final String PROXY_AUTHENTICATE
```
    The HTTP Proxy-Authenticate header field name.
    另请参阅:
    Section 4.3 of RFC 7235, 常量字段值
  - PROXY_AUTHORIZATION
```
public static final String PROXY_AUTHORIZATION
```
    The HTTP Proxy-Authorization header field name.
    另请参阅:
    Section 4.4 of RFC 7235, 常量字段值
  - RANGE
```
public static final String RANGE
```
    The HTTP Range header field name.
    另请参阅:
    Section 3.1 of RFC 7233, 常量字段值
  - REFERER
```
public static final String REFERER
```
    The HTTP Referer header field name.
    另请参阅:
    Section 5.5.2 of RFC 7231, 常量字段值
  - RETRY_AFTER
```
public static final String RETRY_AFTER
```
    The HTTP Retry-After header field name.
    另请参阅:
    Section 7.1.3 of RFC 7231, 常量字段值
  - SERVER
```
public static final String SERVER
```
    The HTTP Server header field name.
    另请参阅:
    Section 7.4.2 of RFC 7231, 常量字段值
  - SET_COOKIE
```
public static final String SET_COOKIE
```
    The HTTP Set-Cookie header field name.
    另请参阅:
    Section 4.2.2 of RFC 2109, 常量字段值
  - SET_COOKIE2
```
public static final String SET_COOKIE2
```
    The HTTP Set-Cookie2 header field name.
    另请参阅:
    RFC 2965, 常量字段值
  - TE
```
public static final String TE
```
    The HTTP TE header field name.
    另请参阅:
    Section 4.3 of RFC 7230, 常量字段值
  - TRAILER
```
public static final String TRAILER
```
    The HTTP Trailer header field name.
    另请参阅:
    Section 4.4 of RFC 7230, 常量字段值
  - TRANSFER_ENCODING
```
public static final String TRANSFER_ENCODING
```
    The HTTP Transfer-Encoding header field name.
    另请参阅:
    Section 3.3.1 of RFC 7230, 常量字段值
  - UPGRADE
```
public static final String UPGRADE
```
    The HTTP Upgrade header field name.
    另请参阅:
    Section 6.7 of RFC 7230, 常量字段值
  - USER_AGENT
```
public static final String USER_AGENT
```
    The HTTP User-Agent header field name.
    另请参阅:
    Section 5.5.3 of RFC 7231, 常量字段值
  - VARY
```
public static final String VARY
```
    The HTTP Vary header field name.
    另请参阅:
    Section 7.1.4 of RFC 7231, 常量字段值
  - VIA
```
public static final String VIA
```
    The HTTP Via header field name.
    另请参阅:
    Section 5.7.1 of RFC 7230, 常量字段值
  - WARNING
```
public static final String WARNING
```
    The HTTP Warning header field name.
    另请参阅:
    Section 5.5 of RFC 7234, 常量字段值
  - WWW_AUTHENTICATE
```
public static final String WWW_AUTHENTICATE
```
    The HTTP WWW-Authenticate header field name.
    另请参阅:
    Section 4.1 of RFC 7235, 常量字段值
  - EMPTY
```
public static final HttpHeaders EMPTY
```
    An empty HttpHeaders instance (immutable).
    从以下版本开始:
    5.0
- 构造器详细资料
  - HttpHeaders
```
public HttpHeaders()
```
    Construct a new, empty instance of the HttpHeaders object.
    This is the common constructor, using a case-insensitive map structure.
  - HttpHeaders
```
public HttpHeaders(MultiValueMap<String,String> headers)
```
    Construct a new HttpHeaders instance backed by an existing map.
    This constructor is available as an optimization for adapting to existing headers map structures, primarily for internal use within the framework.
    参数:
    headers - the headers map (expected to operate with case-insensitive keys)
    从以下版本开始:
    5.1
- 方法详细资料
  - getOrEmpty
```
public List<String> getOrEmpty(Object headerName)
```
    Get the list of header values for the given header name, if any.
    参数:
    headerName - the header name
    返回:
    the list of header values, or an empty list
    从以下版本开始:
    5.2
  - setAccept
```
public void setAccept(List<MediaType> acceptableMediaTypes)
```
    Set the list of acceptable media types, as specified by the Accept header.
  - getAccept
```
public List<MediaType> getAccept()
```
    Return the list of acceptable media types, as specified by the Accept header.
    Returns an empty list when the acceptable media types are unspecified.
  - setAcceptLanguage
```
public void setAcceptLanguage(List<Locale.LanguageRange> languages)
```
    Set the acceptable language ranges, as specified by the Accept-Language header.
    从以下版本开始:
    5.0
  - getAcceptLanguage
```
public List<Locale.LanguageRange> getAcceptLanguage()
```
    Return the language ranges from the "Accept-Language" header.
    If you only need sorted, preferred locales only use getAcceptLanguageAsLocales() or if you need to filter based on a list of supported locales you can pass the returned list to Locale.filter(List, Collection).
    抛出:
    IllegalArgumentException - if the value cannot be converted to a language range
    从以下版本开始:
    5.0
  - setAcceptLanguageAsLocales
```
public void setAcceptLanguageAsLocales(List<Locale> locales)
```
    Variant of setAcceptLanguage(List) using Locale's.
    从以下版本开始:
    5.0
  - getAcceptLanguageAsLocales
```
public List<Locale> getAcceptLanguageAsLocales()
```
    A variant of getAcceptLanguage() that converts each Locale.LanguageRange to a Locale.
    返回:
    the locales or an empty list
    抛出:
    IllegalArgumentException - if the value cannot be converted to a locale
    从以下版本开始:
    5.0
  - setAccessControlAllowCredentials
```
public void setAccessControlAllowCredentials(boolean allowCredentials)
```
    Set the (new) value of the Access-Control-Allow-Credentials response header.
  - getAccessControlAllowCredentials
```
public boolean getAccessControlAllowCredentials()
```
    Return the value of the Access-Control-Allow-Credentials response header.
  - setAccessControlAllowHeaders
```
public void setAccessControlAllowHeaders(List<String> allowedHeaders)
```
    Set the (new) value of the Access-Control-Allow-Headers response header.
  - getAccessControlAllowHeaders
```
public List<String> getAccessControlAllowHeaders()
```
    Return the value of the Access-Control-Allow-Headers response header.
  - setAccessControlAllowMethods
```
public void setAccessControlAllowMethods(List<HttpMethod> allowedMethods)
```
    Set the (new) value of the Access-Control-Allow-Methods response header.
  - getAccessControlAllowMethods
```
public List<HttpMethod> getAccessControlAllowMethods()
```
    Return the value of the Access-Control-Allow-Methods response header.
  - setAccessControlAllowOrigin
```
public void setAccessControlAllowOrigin(@Nullable
                                        String allowedOrigin)
```
    Set the (new) value of the Access-Control-Allow-Origin response header.
  - getAccessControlAllowOrigin
```
@Nullable
public String getAccessControlAllowOrigin()
```
    Return the value of the Access-Control-Allow-Origin response header.
  - setAccessControlExposeHeaders
```
public void setAccessControlExposeHeaders(List<String> exposedHeaders)
```
    Set the (new) value of the Access-Control-Expose-Headers response header.
  - getAccessControlExposeHeaders
```
public List<String> getAccessControlExposeHeaders()
```
    Return the value of the Access-Control-Expose-Headers response header.
  - setAccessControlMaxAge
```
public void setAccessControlMaxAge(Duration maxAge)
```
    Set the (new) value of the Access-Control-Max-Age response header.
    从以下版本开始:
    5.2
  - setAccessControlMaxAge
```
public void setAccessControlMaxAge(long maxAge)
```
    Set the (new) value of the Access-Control-Max-Age response header.
  - getAccessControlMaxAge
```
public long getAccessControlMaxAge()
```
    Return the value of the Access-Control-Max-Age response header.
    Returns -1 when the max age is unknown.
  - setAccessControlRequestHeaders
```
public void setAccessControlRequestHeaders(List<String> requestHeaders)
```
    Set the (new) value of the Access-Control-Request-Headers request header.
  - getAccessControlRequestHeaders
```
public List<String> getAccessControlRequestHeaders()
```
    Return the value of the Access-Control-Request-Headers request header.
  - setAccessControlRequestMethod
```
public void setAccessControlRequestMethod(@Nullable
                                          HttpMethod requestMethod)
```
    Set the (new) value of the Access-Control-Request-Method request header.
  - getAccessControlRequestMethod
```
@Nullable
public HttpMethod getAccessControlRequestMethod()
```
    Return the value of the Access-Control-Request-Method request header.
  - setAcceptCharset
```
public void setAcceptCharset(List<Charset> acceptableCharsets)
```
    Set the list of acceptable charsets, as specified by the Accept-Charset header.
  - getAcceptCharset
```
public List<Charset> getAcceptCharset()
```
    Return the list of acceptable charsets, as specified by the Accept-Charset header.
  - setAllow
```
public void setAllow(Set<HttpMethod> allowedMethods)
```
    Set the set of allowed HTTP methods, as specified by the Allow header.
  - getAllow
```
public Set<HttpMethod> getAllow()
```
    Return the set of allowed HTTP methods, as specified by the Allow header.
    Returns an empty set when the allowed methods are unspecified.
  - setBasicAuth
```
public void setBasicAuth(String username,
                         String password)
```
    Set the value of the Authorization header to Basic Authentication based on the given username and password.
    Note that this method only supports characters in the ISO-8859-1 character set.
    参数:
    username - the username
    password - the password
    抛出:
    IllegalArgumentException - if either user or password contain characters that cannot be encoded to ISO-8859-1
    从以下版本开始:
    5.1
    另请参阅:
    setBasicAuth(String), setBasicAuth(String, String, Charset), encodeBasicAuth(String, String, Charset), RFC 7617
  - setBasicAuth
```
public void setBasicAuth(String username,
                         String password,
                         @Nullable
                         Charset charset)
```
    Set the value of the Authorization header to Basic Authentication based on the given username and password.
    参数:
    username - the username
    password - the password
    charset - the charset to use to convert the credentials into an octet sequence. Defaults to ISO-8859-1.
    抛出:
    IllegalArgumentException - if username or password contains characters that cannot be encoded to the given charset
    从以下版本开始:
    5.1
    另请参阅:
    setBasicAuth(String), setBasicAuth(String, String), encodeBasicAuth(String, String, Charset), RFC 7617
  - setBasicAuth
```
public void setBasicAuth(String encodedCredentials)
```
    Set the value of the Authorization header to Basic Authentication based on the given encoded credentials.
    Favor this method over setBasicAuth(String, String) and setBasicAuth(String, String, Charset) if you wish to cache the encoded credentials.
    参数:
    encodedCredentials - the encoded credentials
    抛出:
    IllegalArgumentException - if supplied credentials string is null or blank
    从以下版本开始:
    5.2
    另请参阅:
    setBasicAuth(String, String), setBasicAuth(String, String, Charset), encodeBasicAuth(String, String, Charset), RFC 7617
  - setBearerAuth
```
public void setBearerAuth(String token)
```
    Set the value of the Authorization header to the given Bearer token.
    参数:
    token - the Base64 encoded token
    从以下版本开始:
    5.1
    另请参阅:
    RFC 6750
  - setCacheControl
```
public void setCacheControl(CacheControl cacheControl)
```
    Set a configured CacheControl instance as the new value of the Cache-Control header.
    从以下版本开始:
    5.0.5
  - setCacheControl
```
public void setCacheControl(@Nullable
                            String cacheControl)
```
    Set the (new) value of the Cache-Control header.
  - getCacheControl
```
@Nullable
public String getCacheControl()
```
    Return the value of the Cache-Control header.
  - setConnection
```
public void setConnection(String connection)
```
    Set the (new) value of the Connection header.
  - setConnection
```
public void setConnection(List<String> connection)
```
    Set the (new) value of the Connection header.
  - getConnection
```
public List<String> getConnection()
```
    Return the value of the Connection header.
  - setContentDispositionFormData
```
public void setContentDispositionFormData(String name,
                                          @Nullable
                                          String filename)
```
    Set the Content-Disposition header when creating a "multipart/form-data" request.
    Applications typically would not set this header directly but rather prepare a MultiValueMap<String, Object>, containing an Object or a Resource for each part, and then pass that to the RestTemplate or WebClient.
    参数:
    name - the control name
    filename - the filename (may be null)
    另请参阅:
    getContentDisposition()
  - setContentDisposition
```
public void setContentDisposition(ContentDisposition contentDisposition)
```
    Set the Content-Disposition header.
    This could be used on a response to indicate if the content is expected to be displayed inline in the browser or as an attachment to be saved locally.
    It can also be used for a "multipart/form-data" request. For more details see notes on setContentDispositionFormData(java.lang.String, java.lang.String).
    从以下版本开始:
    5.0
    另请参阅:
    getContentDisposition()
  - getContentDisposition
```
public ContentDisposition getContentDisposition()
```
    Return a parsed representation of the Content-Disposition header.
    从以下版本开始:
    5.0
    另请参阅:
    setContentDisposition(ContentDisposition)
  - setContentLanguage
```
public void setContentLanguage(@Nullable
                               Locale locale)
```
    Set the Locale of the content language, as specified by the Content-Language header.
    Use put(CONTENT_LANGUAGE, list) if you need to set multiple content languages.
    从以下版本开始:
    5.0
  - getContentLanguage
```
@Nullable
public Locale getContentLanguage()
```
    Get the first Locale of the content languages, as specified by the Content-Language header.
    Use getValuesAsList(String) if you need to get multiple content languages.
    返回:
    the first Locale of the content languages, or null if unknown
    从以下版本开始:
    5.0
  - setContentLength
```
public void setContentLength(long contentLength)
```
    Set the length of the body in bytes, as specified by the Content-Length header.
  - getContentLength
```
public long getContentLength()
```
    Return the length of the body in bytes, as specified by the Content-Length header.
    Returns -1 when the content-length is unknown.
  - setContentType
```
public void setContentType(@Nullable
                           MediaType mediaType)
```
    Set the media type of the body, as specified by the Content-Type header.
  - getContentType
```
@Nullable
public MediaType getContentType()
```
    Return the media type of the body, as specified by the Content-Type header.
    Returns null when the content-type is unknown.
  - setDate
```
public void setDate(ZonedDateTime date)
```
    Set the date and time at which the message was created, as specified by the Date header.
    从以下版本开始:
    5.2
  - setDate
```
public void setDate(Instant date)
```
    Set the date and time at which the message was created, as specified by the Date header.
    从以下版本开始:
    5.2
  - setDate
```
public void setDate(long date)
```
    Set the date and time at which the message was created, as specified by the Date header.
    The date should be specified as the number of milliseconds since January 1, 1970 GMT.
  - getDate
```
public long getDate()
```
    Return the date and time at which the message was created, as specified by the Date header.
    The date is returned as the number of milliseconds since January 1, 1970 GMT. Returns -1 when the date is unknown.
    抛出:
    IllegalArgumentException - if the value cannot be converted to a date
  - setETag
```
public void setETag(@Nullable
                    String etag)
```
    Set the (new) entity tag of the body, as specified by the ETag header.
  - getETag
```
@Nullable
public String getETag()
```
    Return the entity tag of the body, as specified by the ETag header.
  - setExpires
```
public void setExpires(ZonedDateTime expires)
```
    Set the duration after which the message is no longer valid, as specified by the Expires header.
    从以下版本开始:
    5.0.5
  - setExpires
```
public void setExpires(Instant expires)
```
    Set the date and time at which the message is no longer valid, as specified by the Expires header.
    从以下版本开始:
    5.2
  - setExpires
```
public void setExpires(long expires)
```
    Set the date and time at which the message is no longer valid, as specified by the Expires header.
    The date should be specified as the number of milliseconds since January 1, 1970 GMT.
  - getExpires
```
public long getExpires()
```
    Return the date and time at which the message is no longer valid, as specified by the Expires header.
    The date is returned as the number of milliseconds since January 1, 1970 GMT. Returns -1 when the date is unknown.
    另请参阅:
    getFirstZonedDateTime(String)
  - setHost
```
public void setHost(@Nullable
                    InetSocketAddress host)
```
    Set the (new) value of the Host header.
    If the given port is 0, the host header will only contain the host name.
    从以下版本开始:
    5.0
  - getHost
```
@Nullable
public InetSocketAddress getHost()
```
    Return the value of the Host header, if available.
    If the header value does not contain a port, the port in the returned address will be 0.
    从以下版本开始:
    5.0
  - setIfMatch
```
public void setIfMatch(String ifMatch)
```
    Set the (new) value of the If-Match header.
    从以下版本开始:
    4.3
  - setIfMatch
```
public void setIfMatch(List<String> ifMatchList)
```
    Set the (new) value of the If-Match header.
    从以下版本开始:
    4.3
  - getIfMatch
```
public List<String> getIfMatch()
```
    Return the value of the If-Match header.
    抛出:
    IllegalArgumentException - if parsing fails
    从以下版本开始:
    4.3
  - setIfModifiedSince
```
public void setIfModifiedSince(ZonedDateTime ifModifiedSince)
```
    Set the time the resource was last changed, as specified by the Last-Modified header.
    从以下版本开始:
    5.1.4
  - setIfModifiedSince
```
public void setIfModifiedSince(Instant ifModifiedSince)
```
    Set the time the resource was last changed, as specified by the Last-Modified header.
    从以下版本开始:
    5.1.4
  - setIfModifiedSince
```
public void setIfModifiedSince(long ifModifiedSince)
```
    Set the (new) value of the If-Modified-Since header.
    The date should be specified as the number of milliseconds since January 1, 1970 GMT.
  - getIfModifiedSince
```
public long getIfModifiedSince()
```
    Return the value of the If-Modified-Since header.
    The date is returned as the number of milliseconds since January 1, 1970 GMT. Returns -1 when the date is unknown.
    另请参阅:
    getFirstZonedDateTime(String)
  - setIfNoneMatch
```
public void setIfNoneMatch(String ifNoneMatch)
```
    Set the (new) value of the If-None-Match header.
  - setIfNoneMatch
```
public void setIfNoneMatch(List<String> ifNoneMatchList)
```
    Set the (new) values of the If-None-Match header.
  - getIfNoneMatch
```
public List<String> getIfNoneMatch()
```
    Return the value of the If-None-Match header.
    抛出:
    IllegalArgumentException - if parsing fails
  - setIfUnmodifiedSince
```
public void setIfUnmodifiedSince(ZonedDateTime ifUnmodifiedSince)
```
    Set the time the resource was last changed, as specified by the Last-Modified header.
    从以下版本开始:
    5.1.4
  - setIfUnmodifiedSince
```
public void setIfUnmodifiedSince(Instant ifUnmodifiedSince)
```
    Set the time the resource was last changed, as specified by the Last-Modified header.
    从以下版本开始:
    5.1.4
  - setIfUnmodifiedSince
```
public void setIfUnmodifiedSince(long ifUnmodifiedSince)
```
    Set the (new) value of the If-Unmodified-Since header.
    The date should be specified as the number of milliseconds since January 1, 1970 GMT.
    从以下版本开始:
    4.3
  - getIfUnmodifiedSince
```
public long getIfUnmodifiedSince()
```
    Return the value of the If-Unmodified-Since header.
    The date is returned as the number of milliseconds since January 1, 1970 GMT. Returns -1 when the date is unknown.
    从以下版本开始:
    4.3
    另请参阅:
    getFirstZonedDateTime(String)
  - setLastModified
```
public void setLastModified(ZonedDateTime lastModified)
```
    Set the time the resource was last changed, as specified by the Last-Modified header.
    从以下版本开始:
    5.1.4
  - setLastModified
```
public void setLastModified(Instant lastModified)
```
    Set the time the resource was last changed, as specified by the Last-Modified header.
    从以下版本开始:
    5.1.4
  - setLastModified
```
public void setLastModified(long lastModified)
```
    Set the time the resource was last changed, as specified by the Last-Modified header.
    The date should be specified as the number of milliseconds since January 1, 1970 GMT.
  - getLastModified
```
public long getLastModified()
```
    Return the time the resource was last changed, as specified by the Last-Modified header.
    The date is returned as the number of milliseconds since January 1, 1970 GMT. Returns -1 when the date is unknown.
    另请参阅:
    getFirstZonedDateTime(String)
  - setLocation
```
public void setLocation(@Nullable
                        URI location)
```
    Set the (new) location of a resource, as specified by the Location header.
  - getLocation
```
@Nullable
public URI getLocation()
```
    Return the (new) location of a resource as specified by the Location header.
    Returns null when the location is unknown.
  - setOrigin
```
public void setOrigin(@Nullable
                      String origin)
```
    Set the (new) value of the Origin header.
  - getOrigin
```
@Nullable
public String getOrigin()
```
    Return the value of the Origin header.
  - setPragma
```
public void setPragma(@Nullable
                      String pragma)
```
    Set the (new) value of the Pragma header.
  - getPragma
```
@Nullable
public String getPragma()
```
    Return the value of the Pragma header.
  - setRange
```
public void setRange(List<HttpRange> ranges)
```
    Sets the (new) value of the Range header.
  - getRange
```
public List<HttpRange> getRange()
```
    Return the value of the Range header.
    Returns an empty list when the range is unknown.
  - setUpgrade
```
public void setUpgrade(@Nullable
                       String upgrade)
```
    Set the (new) value of the Upgrade header.
  - getUpgrade
```
@Nullable
public String getUpgrade()
```
    Return the value of the Upgrade header.
  - setVary
```
public void setVary(List<String> requestHeaders)
```
    Set the request header names (e.g. "Accept-Language") for which the response is subject to content negotiation and variances based on the value of those request headers.
    参数:
    requestHeaders - the request header names
    从以下版本开始:
    4.3
  - getVary
```
public List<String> getVary()
```
    Return the request header names subject to content negotiation.
    从以下版本开始:
    4.3
  - setZonedDateTime
```
public void setZonedDateTime(String headerName,
                             ZonedDateTime date)
```
    Set the given date under the given header name after formatting it as a string using the RFC-1123 date-time formatter. The equivalent of set(String, String) but for date headers.
    从以下版本开始:
    5.0
  - setInstant
```
public void setInstant(String headerName,
                       Instant date)
```
    Set the given date under the given header name after formatting it as a string using the RFC-1123 date-time formatter. The equivalent of set(String, String) but for date headers.
    从以下版本开始:
    5.1.4
  - setDate
```
public void setDate(String headerName,
                    long date)
```
    Set the given date under the given header name after formatting it as a string using the RFC-1123 date-time formatter. The equivalent of set(String, String) but for date headers.
    从以下版本开始:
    3.2.4
    另请参阅:
    setZonedDateTime(String, ZonedDateTime)
  - getFirstDate
```
public long getFirstDate(String headerName)
```
    Parse the first header value for the given header name as a date, return -1 if there is no value, or raise IllegalArgumentException if the value cannot be parsed as a date.
    参数:
    headerName - the header name
    返回:
    the parsed date header, or -1 if none
    从以下版本开始:
    3.2.4
    另请参阅:
    getFirstZonedDateTime(String)
  - getFirstZonedDateTime
```
@Nullable
public ZonedDateTime getFirstZonedDateTime(String headerName)
```
    Parse the first header value for the given header name as a date, return null if there is no value, or raise IllegalArgumentException if the value cannot be parsed as a date.
    参数:
    headerName - the header name
    返回:
    the parsed date header, or null if none
    从以下版本开始:
    5.0
  - getValuesAsList
```
public List<String> getValuesAsList(String headerName)
```
    Return all values of a given header name, even if this header is set multiple times.
    参数:
    headerName - the header name
    返回:
    all associated values
    从以下版本开始:
    4.3
  - clearContentHeaders
```
public void clearContentHeaders()
```
    Remove the well-known "Content-*" HTTP headers.
    Such headers should be cleared from the response if the intended body can't be written due to errors.
    从以下版本开始:
    5.2.3
  - getETagValuesAsList
```
protected List<String> getETagValuesAsList(String headerName)
```
    Retrieve a combined result from the field values of the ETag header.
    参数:
    headerName - the header name
    返回:
    the combined result
    抛出:
    IllegalArgumentException - if parsing fails
    从以下版本开始:
    4.3
  - getFieldValues
```
@Nullable
protected String getFieldValues(String headerName)
```
    Retrieve a combined result from the field values of multi-valued headers.
    参数:
    headerName - the header name
    返回:
    the combined result
    从以下版本开始:
    4.3
  - toCommaDelimitedString
```
protected String toCommaDelimitedString(List<String> headerValues)
```
    Turn the given list of header values into a comma-delimited result.
    参数:
    headerValues - the list of header values
    返回:
    a combined result with comma delimitation
  - getFirst
```
@Nullable
public String getFirst(String headerName)
```
    Return the first header value for the given header name, if any.
    指定者:
    getFirst 在接口中 MultiValueMap<String,String>
    参数:
    headerName - the header name
    返回:
    the first header value, or null if none
  - add
```
public void add(String headerName,
                @Nullable
                String headerValue)
```
    Add the given, single header value under the given name.
    指定者:
    add 在接口中 MultiValueMap<String,String>
    参数:
    headerName - the header name
    headerValue - the header value
    抛出:
    UnsupportedOperationException - if adding headers is not supported
    另请参阅:
    put(String, List), set(String, String)
  - addAll
```
public void addAll(String key,
                   List<? extends String> values)
```
    从接口复制的说明: MultiValueMap
    Add all the values of the given list to the current list of values for the given key.
    指定者:
    addAll 在接口中 MultiValueMap<String,String>
    参数:
    key - they key
    values - the values to be added
  - addAll
```
public void addAll(MultiValueMap<String,String> values)
```
    从接口复制的说明: MultiValueMap
    Add all the values of the given MultiValueMap to the current values.
    指定者:
    addAll 在接口中 MultiValueMap<String,String>
    参数:
    values - the values to be added
  - set
```
public void set(String headerName,
                @Nullable
                String headerValue)
```
    Set the given, single header value under the given name.
    指定者:
    set 在接口中 MultiValueMap<String,String>
    参数:
    headerName - the header name
    headerValue - the header value
    抛出:
    UnsupportedOperationException - if adding headers is not supported
    另请参阅:
    put(String, List), add(String, String)
  - setAll
```
public void setAll(Map<String,String> values)
```
    从接口复制的说明: MultiValueMap
    Set the given values under.
    指定者:
    setAll 在接口中 MultiValueMap<String,String>
    参数:
    values - the values.
  - toSingleValueMap
```
public Map<String,String> toSingleValueMap()
```
    从接口复制的说明: MultiValueMap
    Return a Map with the first values contained in this MultiValueMap.
    指定者:
    toSingleValueMap 在接口中 MultiValueMap<String,String>
    返回:
    a single value representation of this map
  - size
```
public int size()
```
    指定者:
    size 在接口中 Map<String,List<String>>
  - isEmpty
```
public boolean isEmpty()
```
    指定者:
    isEmpty 在接口中 Map<String,List<String>>
  - containsKey
```
public boolean containsKey(Object key)
```
    指定者:
    containsKey 在接口中 Map<String,List<String>>
  - containsValue
```
public boolean containsValue(Object value)
```
    指定者:
    containsValue 在接口中 Map<String,List<String>>
  - get
```
@Nullable
public List<String> get(Object key)
```
    指定者:
    get 在接口中 Map<String,List<String>>
  - put
```
public List<String> put(String key,
                        List<String> value)
```
    指定者:
    put 在接口中 Map<String,List<String>>
  - remove
```
public List<String> remove(Object key)
```
    指定者:
    remove 在接口中 Map<String,List<String>>
  - putAll
```
public void putAll(Map<? extends String,? extends List<String>> map)
```
    指定者:
    putAll 在接口中 Map<String,List<String>>
  - clear
```
public void clear()
```
    指定者:
    clear 在接口中 Map<String,List<String>>
  - keySet
```
public Set<String> keySet()
```
    指定者:
    keySet 在接口中 Map<String,List<String>>
  - values
```
public Collection<List<String>> values()
```
    指定者:
    values 在接口中 Map<String,List<String>>
  - entrySet
```
public Set<Map.Entry<String,List<String>>> entrySet()
```
    指定者:
    entrySet 在接口中 Map<String,List<String>>
  - equals
```
public boolean equals(@Nullable
                      Object other)
```
    指定者:
    equals 在接口中 Map<String,List<String>>
    覆盖:
    equals 在类中 Object
  - hashCode
```
public int hashCode()
```
    指定者:
    hashCode 在接口中 Map<String,List<String>>
    覆盖:
    hashCode 在类中 Object
  - toString
```
public String toString()
```
    覆盖:
    toString 在类中 Object
  - readOnlyHttpHeaders
```
public static HttpHeaders readOnlyHttpHeaders(HttpHeaders headers)
```
    Apply a read-only HttpHeaders wrapper around the given headers, if necessary.
    参数:
    headers - the headers to expose
    返回:
    a read-only variant of the headers, or the original headers as-is
  - writableHttpHeaders
```
public static HttpHeaders writableHttpHeaders(HttpHeaders headers)
```
    Remove any read-only wrapper that may have been previously applied around the given headers via readOnlyHttpHeaders(HttpHeaders).
    参数:
    headers - the headers to expose
    返回:
    a writable variant of the headers, or the original headers as-is
    从以下版本开始:
    5.1.1
  - formatHeaders
```
public static String formatHeaders(MultiValueMap<String,String> headers)
```
    Helps to format HTTP header values, as HTTP header values themselves can contain comma-separated values, can become confusing with regular Map formatting that also uses commas between entries.
    参数:
    headers - the headers to format
    返回:
    the headers to a String
    从以下版本开始:
    5.1.4
  - encodeBasicAuth
```
public static String encodeBasicAuth(String username,
                                     String password,
                                     @Nullable
                                     Charset charset)
```
    Encode the given username and password into Basic Authentication credentials.
    The encoded credentials returned by this method can be supplied to setBasicAuth(String) to set the Basic Authentication header.
    参数:
    username - the username
    password - the password
    charset - the charset to use to convert the credentials into an octet sequence. Defaults to ISO-8859-1.
    抛出:
    IllegalArgumentException - if username or password contains characters that cannot be encoded to the given charset
    从以下版本开始:
    5.2
    另请参阅:
    setBasicAuth(String), setBasicAuth(String, String), setBasicAuth(String, String, Charset), RFC 7617

类 HttpHeaders

嵌套类概要

从接口继承的嵌套类/接口 java.util.Map

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

从接口继承的方法 java.util.Map

从接口继承的方法 org.springframework.util.MultiValueMap

字段详细资料

ACCEPT

ACCEPT_CHARSET

ACCEPT_ENCODING

ACCEPT_LANGUAGE

ACCEPT_RANGES

ACCESS_CONTROL_ALLOW_CREDENTIALS

ACCESS_CONTROL_ALLOW_HEADERS

ACCESS_CONTROL_ALLOW_METHODS

ACCESS_CONTROL_ALLOW_ORIGIN

ACCESS_CONTROL_EXPOSE_HEADERS

ACCESS_CONTROL_MAX_AGE

ACCESS_CONTROL_REQUEST_HEADERS

ACCESS_CONTROL_REQUEST_METHOD

AGE

ALLOW

AUTHORIZATION

CACHE_CONTROL

CONNECTION

CONTENT_ENCODING

CONTENT_DISPOSITION

CONTENT_LANGUAGE

CONTENT_LENGTH

CONTENT_LOCATION

CONTENT_RANGE

CONTENT_TYPE

COOKIE

DATE

ETAG

EXPECT

EXPIRES

FROM

HOST

IF_MATCH

IF_MODIFIED_SINCE

IF_NONE_MATCH

IF_RANGE

IF_UNMODIFIED_SINCE

LAST_MODIFIED

LINK

LOCATION

MAX_FORWARDS

ORIGIN

PRAGMA

PROXY_AUTHENTICATE

PROXY_AUTHORIZATION

RANGE

REFERER

RETRY_AFTER

SERVER

SET_COOKIE

SET_COOKIE2

TE

TRAILER

TRANSFER_ENCODING

UPGRADE

USER_AGENT

VARY

VIA

WARNING

WWW_AUTHENTICATE

EMPTY

构造器详细资料

HttpHeaders

HttpHeaders

方法详细资料

getOrEmpty

setAccept

getAccept

setAcceptLanguage

getAcceptLanguage