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Class java.net.HttpURLConnection - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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Class java.net.HttpURLConnection 

java.lang.Object
   |
   +----java.net.URLConnection
           |
           +----java.net.HttpURLConnection
public abstract class HttpURLConnection
extends URLConnection
A URLConnection with support for HTTP-specific features. See the spec for details.

Variable Index

o HTTP_ACCEPTED
o HTTP_BAD_GATEWAY
o HTTP_BAD_METHOD
o HTTP_BAD_REQUEST
4XX: client error
o HTTP_CLIENT_TIMEOUT
o HTTP_CONFLICT
o HTTP_CREATED
o HTTP_ENTITY_TOO_LARGE
o HTTP_FORBIDDEN
o HTTP_GATEWAY_TIMEOUT
o HTTP_GONE
o HTTP_INTERNAL_ERROR
o HTTP_LENGTH_REQUIRED
o HTTP_MOVED_PERM
o HTTP_MOVED_TEMP
o HTTP_MULT_CHOICE
3XX: relocation/redirect
o HTTP_NO_CONTENT
o HTTP_NOT_ACCEPTABLE
o HTTP_NOT_AUTHORITATIVE
o HTTP_NOT_FOUND
o HTTP_NOT_MODIFIED
o HTTP_OK
2XX: generally "OK"
o HTTP_PARTIAL
o HTTP_PAYMENT_REQUIRED
o HTTP_PRECON_FAILED
o HTTP_PROXY_AUTH
o HTTP_REQ_TOO_LONG
o HTTP_RESET
o HTTP_SEE_OTHER
o HTTP_SERVER_ERROR
5XX: server error
o HTTP_UNAUTHORIZED
o HTTP_UNAVAILABLE
o HTTP_UNSUPPORTED_TYPE
o HTTP_USE_PROXY
o HTTP_VERSION
o method
o responseCode
o responseMessage

Constructor Index

o HttpURLConnection(URL)
Constructor for the URLStreamHandler.

Method Index

o disconnect()
Close the connection to the server.
o getFollowRedirects()
o getRequestMethod()
Get the request method.
o getResponseCode()
Gets HTTP response status.
o getResponseMessage()
Gets the HTTP response message, if any, returned along with the response code from a server.
o setFollowRedirects(boolean)
Sets whether HTTP redirects (requests with response code 3xx) should be automatically followed by this class.
o setRequestMethod(String)
Set the method for the URL request, one of:
  • GET
  • POST
  • HEAD
  • OPTIONS
  • PUT
  • DELETE
  • TRACE
are legal, subject to protocol restrictions.
o usingProxy()
Indicates if the connection is going through a proxy.

Variables

o method 
 protected String method
o responseCode 
 protected int responseCode
o responseMessage 
 protected String responseMessage
o HTTP_OK 
 public static final int HTTP_OK
2XX: generally "OK"

o HTTP_CREATED 
 public static final int HTTP_CREATED
o HTTP_ACCEPTED 
 public static final int HTTP_ACCEPTED
o HTTP_NOT_AUTHORITATIVE 
 public static final int HTTP_NOT_AUTHORITATIVE
o HTTP_NO_CONTENT 
 public static final int HTTP_NO_CONTENT
o HTTP_RESET 
 public static final int HTTP_RESET
o HTTP_PARTIAL 
 public static final int HTTP_PARTIAL
o HTTP_MULT_CHOICE 
 public static final int HTTP_MULT_CHOICE
3XX: relocation/redirect

o HTTP_MOVED_PERM 
 public static final int HTTP_MOVED_PERM
o HTTP_MOVED_TEMP 
 public static final int HTTP_MOVED_TEMP
o HTTP_SEE_OTHER 
 public static final int HTTP_SEE_OTHER
o HTTP_NOT_MODIFIED 
 public static final int HTTP_NOT_MODIFIED
o HTTP_USE_PROXY 
 public static final int HTTP_USE_PROXY
o HTTP_BAD_REQUEST 
 public static final int HTTP_BAD_REQUEST
4XX: client error

o HTTP_UNAUTHORIZED 
 public static final int HTTP_UNAUTHORIZED
o HTTP_PAYMENT_REQUIRED 
 public static final int HTTP_PAYMENT_REQUIRED
o HTTP_FORBIDDEN 
 public static final int HTTP_FORBIDDEN
o HTTP_NOT_FOUND 
 public static final int HTTP_NOT_FOUND
o HTTP_BAD_METHOD 
 public static final int HTTP_BAD_METHOD
o HTTP_NOT_ACCEPTABLE 
 public static final int HTTP_NOT_ACCEPTABLE
o HTTP_PROXY_AUTH 
 public static final int HTTP_PROXY_AUTH
o HTTP_CLIENT_TIMEOUT 
 public static final int HTTP_CLIENT_TIMEOUT
o HTTP_CONFLICT 
 public static final int HTTP_CONFLICT
o HTTP_GONE 
 public static final int HTTP_GONE
o HTTP_LENGTH_REQUIRED 
 public static final int HTTP_LENGTH_REQUIRED
o HTTP_PRECON_FAILED 
 public static final int HTTP_PRECON_FAILED
o HTTP_ENTITY_TOO_LARGE 
 public static final int HTTP_ENTITY_TOO_LARGE
o HTTP_REQ_TOO_LONG 
 public static final int HTTP_REQ_TOO_LONG
o HTTP_UNSUPPORTED_TYPE 
 public static final int HTTP_UNSUPPORTED_TYPE
o HTTP_SERVER_ERROR 
 public static final int HTTP_SERVER_ERROR
5XX: server error

o HTTP_INTERNAL_ERROR 
 public static final int HTTP_INTERNAL_ERROR
o HTTP_BAD_GATEWAY 
 public static final int HTTP_BAD_GATEWAY
o HTTP_UNAVAILABLE 
 public static final int HTTP_UNAVAILABLE
o HTTP_GATEWAY_TIMEOUT 
 public static final int HTTP_GATEWAY_TIMEOUT
o HTTP_VERSION 
 public static final int HTTP_VERSION

Constructors

o HttpURLConnection 
 protected HttpURLConnection(URL u)
Constructor for the URLStreamHandler.

Methods

o setFollowRedirects 
 public static void setFollowRedirects(boolean set)
Sets whether HTTP redirects (requests with response code 3xx) should be automatically followed by this class. True by default. Applets cannot change this variable.

o getFollowRedirects 
 public static boolean getFollowRedirects()
o setRequestMethod 
 public void setRequestMethod(String method) throws ProtocolException
Set the method for the URL request, one of:
  • GET
  • POST
  • HEAD
  • OPTIONS
  • PUT
  • DELETE
  • TRACE
are legal, subject to protocol restrictions. The default method is GET.

Throws: ProtocolException
if the method cannot be reset or if the requested method isn't valid for HTTP.
o getRequestMethod 
 public String getRequestMethod()
Get the request method.

o getResponseCode 
 public int getResponseCode() throws IOException
Gets HTTP response status. From responses like: 
 HTTP/1.0 200 OK
 HTTP/1.0 401 Unauthorized
Extracts the ints 200 and 401 respectively. Returns -1 if none can be discerned from the response (i.e., the response is not valid HTTP).

o getResponseMessage 
 public String getResponseMessage() throws IOException
Gets the HTTP response message, if any, returned along with the response code from a server. From responses like: 
 HTTP/1.0 200 OK
 HTTP/1.0 404 Not Found
Extracts the Strings "OK" and "Not Found" respectively. Returns null if none could be discerned from the responses (the result was not valid HTTP).

o disconnect 
 public abstract void disconnect()
Close the connection to the server.

o usingProxy 
 public abstract boolean usingProxy()
Indicates if the connection is going through a proxy. 

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