HttpHeaders (Spring Framework 4.0.3.RELEASE API)

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

All Implemented Interfaces:

Serializable, Map<String,List<String>>, MultiValueMap<String,String>

Direct Known Subclasses:

WebSocketHttpHeaders
```
public class HttpHeaders
extends Object
implements MultiValueMap<String,String>, Serializable
```
Represents HTTP request and response headers, mapping string header names to list of string values.
In addition to the normal methods defined by Map, this class offers the following convenience methods:
- 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
Inspired by Headers.
Since:

3.0

Author:

Arjen Poutsma

See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from interface java.util.Map
  Map.Entry<K,V>

Constructor Summary

Constructors
Constructor and Description

HttpHeaders()
Constructs a new, empty instance of the HttpHeaders object.

Constructors
Constructor and Description
`HttpHeaders()` Constructs a new, empty instance of the `HttpHeaders` object.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`void`	`add(String headerName, String headerValue)` Add the given, single header value under the given name.
`void`	`clear()`
`boolean`	`containsKey(Object key)`
`boolean`	`containsValue(Object value)`
`Set<Map.Entry<String,List<String>>>`	`entrySet()`
`boolean`	`equals(Object other)`
`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.
`Set<HttpMethod>`	`getAllow()` Return the set of allowed `HTTP methods`, as specified by the `Allow` header.
`String`	`getCacheControl()` Returns the value of the `Cache-Control` header.
`List<String>`	`getConnection()` Returns the value of the `Connection` 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()` Returns the date and time at which the message was created, as specified by the `Date` header.
`String`	`getETag()` Returns the entity tag of the body, as specified by the `ETag` header.
`long`	`getExpires()` Returns the date and time at which the message is no longer valid, as specified by the `Expires` header.
`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.
`protected List<String>`	`getFirstValueAsList(String header)`
`long`	`getIfModifiedSince()` Returns the value of the `If-Modified-Since` header.
`List<String>`	`getIfNoneMatch()` Returns the value of the `If-None-Match` header.
`long`	`getIfNotModifiedSince()` Deprecated. use `getIfModifiedSince()`
`long`	`getLastModified()` Returns 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.
`String`	`getOrigin()` Returns the value of the `Origin` header.
`String`	`getPragma()` Returns the value of the `Pragma` header.
`String`	`getUpgrade()` Returns the value of the `Upgrade` header.
`int`	`hashCode()`
`boolean`	`isEmpty()`
`Set<String>`	`keySet()`
`List<String>`	`put(String key, List<String> value)`
`void`	`putAll(Map<? extends String,? extends List<String>> m)`
`static HttpHeaders`	`readOnlyHttpHeaders(HttpHeaders headers)` Returns `HttpHeaders` object that can only be read, not written to.
`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`	`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`	`setCacheControl(String cacheControl)` Sets the (new) value of the `Cache-Control` header.
`void`	`setConnection(List<String> connection)` Sets the (new) value of the `Connection` header.
`void`	`setConnection(String connection)` Sets the (new) value of the `Connection` header.
`void`	`setContentDispositionFormData(String name, String filename)` Sets the (new) value of the `Content-Disposition` header for `form-data`.
`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)` Sets 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 pattern `"EEE, dd MMM yyyy HH:mm:ss zzz"`.
`void`	`setETag(String eTag)` Sets the (new) entity tag of the body, as specified by the `ETag` header.
`void`	`setExpires(long expires)` Sets the date and time at which the message is no longer valid, as specified by the `Expires` header.
`void`	`setIfModifiedSince(long ifModifiedSince)` Sets the (new) value of the `If-Modified-Since` header.
`void`	`setIfNoneMatch(List<String> ifNoneMatchList)` Sets the (new) values of the `If-None-Match` header.
`void`	`setIfNoneMatch(String ifNoneMatch)` Sets the (new) value of the `If-None-Match` header.
`void`	`setLastModified(long lastModified)` Sets 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)` Sets the (new) value of the `Origin` header.
`void`	`setPragma(String pragma)` Sets the (new) value of the `Pragma` header.
`void`	`setUpgrade(String upgrade)` Sets the (new) value of the `Upgrade` header.
`int`	`size()`
`protected String`	`toCommaDelimitedString(List<String> list)`
`Map<String,String>`	`toSingleValueMap()` Returns the first values contained in this `MultiValueMap`.
`String`	`toString()`
`Collection<List<String>>`	`values()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

- Constructor Detail
  - HttpHeaders
```
public HttpHeaders()
```
    Constructs a new, empty instance of the HttpHeaders object.
- Method Detail
  - readOnlyHttpHeaders
```
public static HttpHeaders readOnlyHttpHeaders(HttpHeaders headers)
```
    Returns HttpHeaders object that can only be read, not written to.
  - setAccept
```
public void setAccept(List<MediaType> acceptableMediaTypes)
```
    Set the list of acceptable media types, as specified by the Accept header.
    
    Parameters:
    
    acceptableMediaTypes - the acceptable media types
  - 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.
    
    Returns:
    
    the acceptable media types
  - setAcceptCharset
```
public void setAcceptCharset(List<Charset> acceptableCharsets)
```
    Set the list of acceptable charsets, as specified by the Accept-Charset header.
    
    Parameters:
    
    acceptableCharsets - the acceptable charsets
  - getAcceptCharset
```
public List<Charset> getAcceptCharset()
```
    Return the list of acceptable charsets, as specified by the Accept-Charset header.
    
    Returns:
    
    the acceptable charsets
  - setAllow
```
public void setAllow(Set<HttpMethod> allowedMethods)
```
    Set the set of allowed HTTP methods, as specified by the Allow header.
    
    Parameters:
    
    allowedMethods - the allowed methods
  - 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.
    
    Returns:
    
    the allowed methods
  - setCacheControl
```
public void setCacheControl(String cacheControl)
```
    Sets the (new) value of the Cache-Control header.
    
    Parameters:
    
    cacheControl - the value of the header
  - getCacheControl
```
public String getCacheControl()
```
    Returns the value of the Cache-Control header.
    
    Returns:
    
    the value of the header
  - setConnection
```
public void setConnection(String connection)
```
    Sets the (new) value of the Connection header.
    
    Parameters:
    
    connection - the value of the header
  - setConnection
```
public void setConnection(List<String> connection)
```
    Sets the (new) value of the Connection header.
    
    Parameters:
    
    connection - the value of the header
  - getConnection
```
public List<String> getConnection()
```
    Returns the value of the Connection header.
    
    Returns:
    
    the value of the header
  - setContentDispositionFormData
```
public void setContentDispositionFormData(String name,
                                          String filename)
```
    Sets the (new) value of the Content-Disposition header for form-data.
    
    Parameters:
    
    name - the control name
    
    filename - the filename, may be null
  - setContentLength
```
public void setContentLength(long contentLength)
```
    Set the length of the body in bytes, as specified by the Content-Length header.
    
    Parameters:
    
    contentLength - the content length
  - 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.
    
    Returns:
    
    the content length
  - setContentType
```
public void setContentType(MediaType mediaType)
```
    Set the media type of the body, as specified by the Content-Type header.
    
    Parameters:
    
    mediaType - the media type
  - getContentType
```
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.
    
    Returns:
    
    the content type
  - setDate
```
public void setDate(long date)
```
    Sets 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.
    
    Parameters:
    
    date - the date
  - getDate
```
public long getDate()
```
    Returns 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.
    
    Returns:
    
    the creation date/time
    
    Throws:
    
    IllegalArgumentException - if the value can't be converted to a date
  - setETag
```
public void setETag(String eTag)
```
    Sets the (new) entity tag of the body, as specified by the ETag header.
    
    Parameters:
    
    eTag - the new entity tag
  - getETag
```
public String getETag()
```
    Returns the entity tag of the body, as specified by the ETag header.
    
    Returns:
    
    the entity tag
  - setExpires
```
public void setExpires(long expires)
```
    Sets 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.
    
    Parameters:
    
    expires - the new expires header value
  - getExpires
```
public long getExpires()
```
    Returns 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.
    
    Returns:
    
    the expires value
  - setIfModifiedSince
```
public void setIfModifiedSince(long ifModifiedSince)
```
    Sets the (new) value of the If-Modified-Since header.
    The date should be specified as the number of milliseconds since January 1, 1970 GMT.
    
    Parameters:
    
    ifModifiedSince - the new value of the header
  - getIfNotModifiedSince
```
@Deprecated
public long getIfNotModifiedSince()
```
    Deprecated. use getIfModifiedSince()
    
    Returns the value of the IfModifiedSince header.
    The date is returned as the number of milliseconds since January 1, 1970 GMT. Returns -1 when the date is unknown.
    
    Returns:
    
    the header value
  - getIfModifiedSince
```
public long getIfModifiedSince()
```
    Returns 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.
    
    Returns:
    
    the header value
  - setIfNoneMatch
```
public void setIfNoneMatch(String ifNoneMatch)
```
    Sets the (new) value of the If-None-Match header.
    
    Parameters:
    
    ifNoneMatch - the new value of the header
  - setIfNoneMatch
```
public void setIfNoneMatch(List<String> ifNoneMatchList)
```
    Sets the (new) values of the If-None-Match header.
    
    Parameters:
    
    ifNoneMatchList - the new value of the header
  - toCommaDelimitedString
```
protected String toCommaDelimitedString(List<String> list)
```
  - getIfNoneMatch
```
public List<String> getIfNoneMatch()
```
    Returns the value of the If-None-Match header.
    
    Returns:
    
    the header value
  - getFirstValueAsList
```
protected List<String> getFirstValueAsList(String header)
```
  - setLastModified
```
public void setLastModified(long lastModified)
```
    Sets 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.
    
    Parameters:
    
    lastModified - the last modified date
  - getLastModified
```
public long getLastModified()
```
    Returns 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.
    
    Returns:
    
    the last modified date
  - setLocation
```
public void setLocation(URI location)
```
    Set the (new) location of a resource, as specified by the Location header.
    
    Parameters:
    
    location - the location
  - getLocation
```
public URI getLocation()
```
    Return the (new) location of a resource, as specified by the Location header.
    Returns null when the location is unknown.
    
    Returns:
    
    the location
  - setOrigin
```
public void setOrigin(String origin)
```
    Sets the (new) value of the Origin header.
    
    Parameters:
    
    origin - the value of the header
  - getOrigin
```
public String getOrigin()
```
    Returns the value of the Origin header.
    
    Returns:
    
    the value of the header
  - setPragma
```
public void setPragma(String pragma)
```
    Sets the (new) value of the Pragma header.
    
    Parameters:
    
    pragma - the value of the header
  - getPragma
```
public String getPragma()
```
    Returns the value of the Pragma header.
    
    Returns:
    
    the value of the header
  - setUpgrade
```
public void setUpgrade(String upgrade)
```
    Sets the (new) value of the Upgrade header.
    
    Parameters:
    
    upgrade - the value of the header
  - getUpgrade
```
public String getUpgrade()
```
    Returns the value of the Upgrade header.
    
    Returns:
    
    the value of the header
  - 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.
  - 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 pattern "EEE, dd MMM yyyy HH:mm:ss zzz". The equivalent of set(String, String) but for date headers.
  - getFirst
```
public String getFirst(String headerName)
```
    Return the first header value for the given header name, if any.
    
    Specified by:
    
    getFirst in interface MultiValueMap<String,String>
    
    Parameters:
    
    headerName - the header name
    
    Returns:
    
    the first header value; or null
  - add
```
public void add(String headerName,
                String headerValue)
```
    Add the given, single header value under the given name.
    
    Specified by:
    
    add in interface MultiValueMap<String,String>
    
    Parameters:
    
    headerName - the header name
    
    headerValue - the header value
    
    Throws:
    
    UnsupportedOperationException - if adding headers is not supported
    
    See Also:
    
    put(String, List), set(String, String)
  - set
```
public void set(String headerName,
                String headerValue)
```
    Set the given, single header value under the given name.
    
    Specified by:
    
    set in interface MultiValueMap<String,String>
    
    Parameters:
    
    headerName - the header name
    
    headerValue - the header value
    
    Throws:
    
    UnsupportedOperationException - if adding headers is not supported
    
    See Also:
    
    put(String, List), add(String, String)
  - setAll
```
public void setAll(Map<String,String> values)
```
    Description copied from interface: MultiValueMap
    
    Set the given values under.
    
    Specified by:
    
    setAll in interface MultiValueMap<String,String>
    
    Parameters:
    
    values - the values.
  - toSingleValueMap
```
public Map<String,String> toSingleValueMap()
```
    Description copied from interface: MultiValueMap
    
    Returns the first values contained in this MultiValueMap.
    
    Specified by:
    
    toSingleValueMap in interface MultiValueMap<String,String>
    
    Returns:
    
    a single value representation of this map
  - size
```
public int size()
```
    Specified by:
    
    size in interface Map<String,List<String>>
  - isEmpty
```
public boolean isEmpty()
```
    Specified by:
    
    isEmpty in interface Map<String,List<String>>
  - containsKey
```
public boolean containsKey(Object key)
```
    Specified by:
    
    containsKey in interface Map<String,List<String>>
  - containsValue
```
public boolean containsValue(Object value)
```
    Specified by:
    
    containsValue in interface Map<String,List<String>>
  - get
```
public List<String> get(Object key)
```
    Specified by:
    
    get in interface Map<String,List<String>>
  - put
```
public List<String> put(String key,
                        List<String> value)
```
    Specified by:
    
    put in interface Map<String,List<String>>
  - remove
```
public List<String> remove(Object key)
```
    Specified by:
    
    remove in interface Map<String,List<String>>
  - putAll
```
public void putAll(Map<? extends String,? extends List<String>> m)
```
    Specified by:
    
    putAll in interface Map<String,List<String>>
  - clear
```
public void clear()
```
    Specified by:
    
    clear in interface Map<String,List<String>>
  - keySet
```
public Set<String> keySet()
```
    Specified by:
    
    keySet in interface Map<String,List<String>>
  - values
```
public Collection<List<String>> values()
```
    Specified by:
    
    values in interface Map<String,List<String>>
  - entrySet
```
public Set<Map.Entry<String,List<String>>> entrySet()
```
    Specified by:
    
    entrySet in interface Map<String,List<String>>
  - equals
```
public boolean equals(Object other)
```
    Specified by:
    
    equals in interface Map<String,List<String>>
    
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Specified by:
    
    hashCode in interface Map<String,List<String>>
    
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class HttpHeaders

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Map

Constructor Detail

HttpHeaders

Method Detail

readOnlyHttpHeaders

setAccept

getAccept

setAcceptCharset

getAcceptCharset

setAllow

getAllow

setCacheControl

getCacheControl

setConnection

setConnection

getConnection

setContentDispositionFormData

setContentLength

getContentLength

setContentType

getContentType

setDate

getDate

setETag

getETag

setExpires

getExpires

setIfModifiedSince

getIfNotModifiedSince

getIfModifiedSince

setIfNoneMatch

setIfNoneMatch

toCommaDelimitedString

getIfNoneMatch

getFirstValueAsList

setLastModified

getLastModified

setLocation

getLocation

setOrigin

getOrigin

setPragma

getPragma

setUpgrade

getUpgrade

getFirstDate

setDate

getFirst

add

set

setAll

toSingleValueMap

size

isEmpty

containsKey

containsValue

get

put

remove

putAll

clear

keySet

values

entrySet

equals

hashCode

toString