org.eclipse.jetty.server
类 Request

java.lang.Object
  org.eclipse.jetty.server.Request

所有已实现的接口：

HttpServletRequest, ServletRequest

直接已知子类：

Ajp13Request, NestedRequest

public class Request
extends Object
implements HttpServletRequest

Jetty Request.

Implements HttpServletRequest from the javax.servlet.http package.

The standard interface of mostly getters, is extended with setters so that the request is mutable by the handlers that it is passed to. This allows the request object to be as lightweight as possible and not actually implement any significant behavior. For example

• The getContextPath() method will return null, until the request has been passed to a ContextHandler which matches the getPathInfo() with a context path and calls setContextPath(String) as a result.
• the HTTP session methods will all return null sessions until such time as a request has been passed to a SessionHandler which checks for session cookies and enables the ability to create new sessions.
• The getServletPath() method will return null until the request has been passed to a org.eclipse.jetty.servlet.ServletHandler and the pathInfo matched against the servlet URL patterns and setServletPath(String) called as a result.

A request instance is created for each AbstractHttpConnection accepted by the server and recycled for each HTTP request received via that connection. An effort is made to avoid reparsing headers and cookies that are likely to be the same for requests from the same connection.

The form content that a request can process is limited to protect from Denial of Service attacks. The size in bytes is limited by ContextHandler.getMaxFormContentSize() or if there is no context then the "org.eclipse.jetty.server.Request.maxFormContentSize" Server attribute. The number of parameters keys is limited by ContextHandler.getMaxFormKeys() or if there is no context then the "org.eclipse.jetty.server.Request.maxFormKeys" Server attribute.

嵌套类摘要

static class

Request.MultiPartCleanerListener

字段摘要

static String	__MULTIPART_CONFIG_ELEMENT
static String	__MULTIPART_CONTEXT
static String	__MULTIPART_INPUT_STREAM
protected AsyncContinuation	_async
protected AbstractHttpConnection	_connection

从接口 javax.servlet.http.HttpServletRequest 继承的字段

BASIC_AUTH, CLIENT_CERT_AUTH, DIGEST_AUTH, FORM_AUTH

构造方法摘要

Request()

Request(AbstractHttpConnection connection)

方法摘要

void	addEventListener(EventListener listener)
boolean	authenticate(HttpServletResponse response) Use the container login mechanism configured for the ServletContext to authenticate the user making this request.
void	extractParameters() Extract Parameters from query string and/or form _content.
AsyncContext	getAsyncContext() Gets the AsyncContext that was created or reinitialized by the most recent invocation of ServletRequest.startAsync() or ServletRequest.startAsync(ServletRequest,ServletResponse) on this request.
AsyncContinuation	getAsyncContinuation()
Object	getAttribute(String name) Returns the value of the named attribute as an Object, or null if no attribute of the given name exists.
Enumeration	getAttributeNames() Returns an Enumeration containing the names of the attributes available to this request.
Attributes	getAttributes()
Authentication	getAuthentication() Get the authentication.
String	getAuthType() Returns the name of the authentication scheme used to protect the servlet.
String	getCharacterEncoding() Returns the name of the character encoding used in the body of this request.
AbstractHttpConnection	getConnection()
int	getContentLength() Returns the length, in bytes, of the request body and made available by the input stream, or -1 if the length is not known.
long	getContentRead()
String	getContentType() Returns the MIME type of the body of the request, or null if the type is not known.
ContextHandler.Context	getContext()
String	getContextPath() Returns the portion of the request URI that indicates the context of the request.
Cookie[]	getCookies() Returns an array containing all of the Cookie objects the client sent with this request.
long	getDateHeader(String name) Returns the value of the specified request header as a long value that represents a Date object.
DispatcherType	getDispatcherType() Gets the dispatcher type of this request.
long	getDispatchTime() Get timestamp of the request dispatch
String	getHeader(String name) Returns the value of the specified request header as a String.
Enumeration	getHeaderNames() Returns an enumeration of all the header names this request contains.
Enumeration	getHeaders(String name) Returns all the values of the specified request header as an Enumeration of String objects.
int	getInputState()
ServletInputStream	getInputStream() Retrieves the body of the request as binary data using a ServletInputStream.
int	getIntHeader(String name) Returns the value of the specified request header as an int.
String	getLocalAddr() Returns the Internet Protocol (IP) address of the interface on which the request was received.
Locale	getLocale() Returns the preferred Locale that the client will accept content in, based on the Accept-Language header.
Enumeration	getLocales() Returns an Enumeration of Locale objects indicating, in decreasing order starting with the preferred locale, the locales that are acceptable to the client based on the Accept-Language header.
String	getLocalName() Returns the host name of the Internet Protocol (IP) interface on which the request was received.
int	getLocalPort() Returns the Internet Protocol (IP) port number of the interface on which the request was received.
String	getMethod() Returns the name of the HTTP method with which this request was made, for example, GET, POST, or PUT.
String	getParameter(String name) Returns the value of a request parameter as a String, or null if the parameter does not exist.
Map	getParameterMap() Returns a java.util.Map of the parameters of this request.
Enumeration	getParameterNames() Returns an Enumeration of String objects containing the names of the parameters contained in this request.
MultiMap<String>	getParameters()
String[]	getParameterValues(String name) Returns an array of String objects containing all of the values the given request parameter has, or null if the parameter does not exist.
Part	getPart(String name) Gets the Part with the given name.
Collection<Part>	getParts() Gets all the Part components of this request, provided that it is of type multipart/form-data.
String	getPathInfo() Returns any extra path information associated with the URL the client sent when it made this request.
String	getPathTranslated() Returns any extra path information after the servlet name but before the query string, and translates it to a real path.
String	getProtocol() Returns the name and version of the protocol the request uses in the form protocol/majorVersion.minorVersion, for example, HTTP/1.1.
String	getQueryEncoding()
String	getQueryString() Returns the query string that is contained in the request URL after the path.
BufferedReader	getReader() Retrieves the body of the request as character data using a BufferedReader.
String	getRealPath(String path)
String	getRemoteAddr() Returns the Internet Protocol (IP) address of the client or last proxy that sent the request.
String	getRemoteHost() Returns the fully qualified name of the client or the last proxy that sent the request.
int	getRemotePort() Returns the Internet Protocol (IP) source port of the client or last proxy that sent the request.
String	getRemoteUser() Returns the login of the user making this request, if the user has been authenticated, or null if the user has not been authenticated.
static Request	getRequest(HttpServletRequest request)
RequestDispatcher	getRequestDispatcher(String path) Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path.
String	getRequestedSessionId() Returns the session ID specified by the client.
String	getRequestURI() Returns the part of this request's URL from the protocol name up to the query string in the first line of the HTTP request.
StringBuffer	getRequestURL() Reconstructs the URL the client used to make the request.
UserIdentity	getResolvedUserIdentity()
Response	getResponse()
StringBuilder	getRootURL() Reconstructs the URL the client used to make the request.
String	getScheme() Returns the name of the scheme used to make this request, for example, http, https, or ftp.
String	getServerName() Returns the host name of the server to which the request was sent.
int	getServerPort() Returns the port number to which the request was sent.
ServletContext	getServletContext() Gets the servlet context to which this ServletRequest was last dispatched.
String	getServletName()
String	getServletPath() Returns the part of this request's URL that calls the servlet.
ServletResponse	getServletResponse()
HttpSession	getSession() Returns the current session associated with this request, or if the request does not have a session, creates one.
HttpSession	getSession(boolean create) Returns the current HttpSession associated with this request or, if there is no current session and create is true, returns a new session.
SessionManager	getSessionManager()
long	getTimeStamp() Get Request TimeStamp
Buffer	getTimeStampBuffer() Get Request TimeStamp
HttpURI	getUri()
UserIdentity	getUserIdentity()
UserIdentity.Scope	getUserIdentityScope()
Principal	getUserPrincipal() Returns a java.security.Principal object containing the name of the current authenticated user.
boolean	isAsyncStarted() Checks if this request has been put into asynchronous mode.
boolean	isAsyncSupported() Checks if this request supports asynchronous operation.
boolean	isHandled()
boolean	isRequestedSessionIdFromCookie() Checks whether the requested session ID came in as a cookie.
boolean	isRequestedSessionIdFromUrl()
boolean	isRequestedSessionIdFromURL() Checks whether the requested session ID came in as part of the request URL.
boolean	isRequestedSessionIdValid() Checks whether the requested session ID is still valid.
boolean	isSecure() Returns a boolean indicating whether this request was made using a secure channel, such as HTTPS.
boolean	isUserInRole(String role) Returns a boolean indicating whether the authenticated user is included in the specified logical "role".
void	login(String username, String password) Validate the provided username and password in the password validation realm used by the web container login mechanism configured for the ServletContext.
void	logout() Establish null as the value returned when getUserPrincipal, getRemoteUser, and getAuthType is called on the request.
void	mergeQueryString(String query) Merge in a new query string.
HttpSession	recoverNewSession(Object key)
protected void	recycle()
void	removeAttribute(String name) Removes an attribute from this request.
void	removeEventListener(EventListener listener)
void	saveNewSession(Object key, HttpSession session)
void	setAsyncSupported(boolean supported)
void	setAttribute(String name, Object value) Stores an attribute in this request.
void	setAttributes(Attributes attributes)
void	setAuthentication(Authentication authentication) Set the authentication.
void	setCharacterEncoding(String encoding) Overrides the name of the character encoding used in the body of this request.
void	setCharacterEncodingUnchecked(String encoding)
protected void	setConnection(AbstractHttpConnection connection)
void	setContentType(String contentType)
void	setContext(ContextHandler.Context context) Set request context
void	setContextPath(String contextPath) Sets the "context path" for this request
void	setCookies(Cookie[] cookies)
void	setDispatcherType(DispatcherType type)
void	setDispatchTime(long value) Set timetstamp of request dispatch
void	setHandled(boolean h)
void	setMethod(String method)
void	setParameters(MultiMap<String> parameters)
void	setPathInfo(String pathInfo)
void	setProtocol(String protocol)
void	setQueryEncoding(String queryEncoding) Set the character encoding used for the query string.
void	setQueryString(String queryString)
void	setRemoteAddr(String addr)
void	setRemoteHost(String host)
void	setRequestedSessionId(String requestedSessionId)
void	setRequestedSessionIdFromCookie(boolean requestedSessionIdCookie)
void	setRequestURI(String requestURI)
void	setScheme(String scheme)
void	setServerName(String host)
void	setServerPort(int port)
void	setServletPath(String servletPath)
void	setSession(HttpSession session)
void	setSessionManager(SessionManager sessionManager)
void	setTimeStamp(long ts)
void	setUri(HttpURI uri)
void	setUserIdentityScope(UserIdentity.Scope scope)
AsyncContext	startAsync() Puts this request into asynchronous mode, and initializes its AsyncContext with the original (unwrapped) ServletRequest and ServletResponse objects.
AsyncContext	startAsync(ServletRequest servletRequest, ServletResponse servletResponse) Puts this request into asynchronous mode, and initializes its AsyncContext with the given request and response objects.
boolean	takeNewContext()
String	toString()

从类 java.lang.Object 继承的方法

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

字段详细信息

__MULTIPART_CONFIG_ELEMENT

public static final String __MULTIPART_CONFIG_ELEMENT

另请参见：

常量字段值

__MULTIPART_INPUT_STREAM

public static final String __MULTIPART_INPUT_STREAM

另请参见：

常量字段值

__MULTIPART_CONTEXT

public static final String __MULTIPART_CONTEXT

另请参见：

常量字段值

_async

protected final AsyncContinuation _async

_connection

protected AbstractHttpConnection _connection

构造方法详细信息

Request

public Request()

Request

public Request(AbstractHttpConnection connection)

方法详细信息

getRequest

public static Request getRequest(HttpServletRequest request)

addEventListener

public void addEventListener(EventListener listener)

extractParameters

public void extractParameters()

Extract Parameters from query string and/or form _content.

getAsyncContext

public AsyncContext getAsyncContext()

从接口 ServletRequest 复制的描述

Gets the AsyncContext that was created or reinitialized by the most recent invocation of ServletRequest.startAsync() or ServletRequest.startAsync(ServletRequest,ServletResponse) on this request.

指定者：

接口 ServletRequest 中的 getAsyncContext

返回：

the AsyncContext that was created or reinitialized by the most recent invocation of ServletRequest.startAsync() or ServletRequest.startAsync(ServletRequest,ServletResponse) on this request

getAsyncContinuation

public AsyncContinuation getAsyncContinuation()

getAttribute

public Object getAttribute(String name)

从接口 ServletRequest 复制的描述

Returns the value of the named attribute as an Object, or null if no attribute of the given name exists.

Attributes can be set two ways. The servlet container may set attributes to make available custom information about a request. For example, for requests made using HTTPS, the attribute javax.servlet.request.X509Certificate can be used to retrieve information on the certificate of the client. Attributes can also be set programatically using ServletRequest.setAttribute(java.lang.String, java.lang.Object). This allows information to be embedded into a request before a RequestDispatcher call.

Attribute names should follow the same conventions as package names. This specification reserves names matching java.*, javax.*, and sun.*.

指定者：

接口 ServletRequest 中的 getAttribute

参数：

name - a String specifying the name of the attribute

返回：

an Object containing the value of the attribute, or null if the attribute does not exist

getAttributeNames

public Enumeration getAttributeNames()

从接口 ServletRequest 复制的描述

Returns an Enumeration containing the names of the attributes available to this request. This method returns an empty Enumeration if the request has no attributes available to it.

指定者：

接口 ServletRequest 中的 getAttributeNames

返回：

an Enumeration of strings containing the names of the request's attributes

getAttributes

public Attributes getAttributes()

getAuthentication

public Authentication getAuthentication()

Get the authentication.

返回：

the authentication

getAuthType

public String getAuthType()

从接口 HttpServletRequest 复制的描述

Returns the name of the authentication scheme used to protect the servlet. All servlet containers support basic, form and client certificate authentication, and may additionally support digest authentication. If the servlet is not authenticated null is returned.

Same as the value of the CGI variable AUTH_TYPE.

指定者：

接口 HttpServletRequest 中的 getAuthType

返回：

one of the static members BASIC_AUTH, FORM_AUTH, CLIENT_CERT_AUTH, DIGEST_AUTH (suitable for == comparison) or the container-specific string indicating the authentication scheme, or null if the request was not authenticated.

getCharacterEncoding

public String getCharacterEncoding()

从接口 ServletRequest 复制的描述

Returns the name of the character encoding used in the body of this request. This method returns null if the request does not specify a character encoding

指定者：

接口 ServletRequest 中的 getCharacterEncoding

返回：

a String containing the name of the character encoding, or null if the request does not specify a character encoding

getConnection

public AbstractHttpConnection getConnection()

返回：

Returns the connection.

getContentLength

public int getContentLength()

从接口 ServletRequest 复制的描述

Returns the length, in bytes, of the request body and made available by the input stream, or -1 if the length is not known. For HTTP servlets, same as the value of the CGI variable CONTENT_LENGTH.

指定者：

接口 ServletRequest 中的 getContentLength

返回：

an integer containing the length of the request body or -1 if the length is not known

getContentRead

public long getContentRead()

getContentType

public String getContentType()

从接口 ServletRequest 复制的描述

Returns the MIME type of the body of the request, or null if the type is not known. For HTTP servlets, same as the value of the CGI variable CONTENT_TYPE.

指定者：

接口 ServletRequest 中的 getContentType

返回：

a String containing the name of the MIME type of the request, or null if the type is not known

getContext

public ContextHandler.Context getContext()

返回：

The current context used for this request, or null if setContext(org.eclipse.jetty.server.handler.ContextHandler.Context) has not yet been called.

getContextPath

public String getContextPath()

从接口 HttpServletRequest 复制的描述

Returns the portion of the request URI that indicates the context of the request. The context path always comes first in a request URI. The path starts with a "/" character but does not end with a "/" character. For servlets in the default (root) context, this method returns "". The container does not decode this string.

It is possible that a servlet container may match a context by more than one context path. In such cases this method will return the actual context path used by the request and it may differ from the path returned by the ServletContext.getContextPath() method. The context path returned by ServletContext.getContextPath() should be considered as the prime or preferred context path of the application.

指定者：

接口 HttpServletRequest 中的 getContextPath

返回：

a String specifying the portion of the request URI that indicates the context of the request

另请参见：

ServletContext.getContextPath()

getCookies

public Cookie[] getCookies()

从接口 HttpServletRequest 复制的描述

Returns an array containing all of the Cookie objects the client sent with this request. This method returns null if no cookies were sent.

指定者：

接口 HttpServletRequest 中的 getCookies

返回：

an array of all the Cookies included with this request, or null if the request has no cookies

getDateHeader

public long getDateHeader(String name)

从接口 HttpServletRequest 复制的描述

Returns the value of the specified request header as a long value that represents a Date object. Use this method with headers that contain dates, such as If-Modified-Since.

The date is returned as the number of milliseconds since January 1, 1970 GMT. The header name is case insensitive.

If the request did not have a header of the specified name, this method returns -1. If the header can't be converted to a date, the method throws an IllegalArgumentException.

指定者：

接口 HttpServletRequest 中的 getDateHeader

参数：

name - a String specifying the name of the header

返回：

a long value representing the date specified in the header expressed as the number of milliseconds since January 1, 1970 GMT, or -1 if the named header was not included with the request

getDispatcherType

public DispatcherType getDispatcherType()

从接口 ServletRequest 复制的描述

Gets the dispatcher type of this request.

The dispatcher type of a request is used by the container to select the filters that need to be applied to the request: Only filters with matching dispatcher type and url patterns will be applied.

Allowing a filter that has been configured for multiple dispatcher types to query a request for its dispatcher type allows the filter to process the request differently depending on its dispatcher type.

The initial dispatcher type of a request is defined as DispatcherType.REQUEST. The dispatcher type of a request dispatched via RequestDispatcher.forward(ServletRequest, ServletResponse) or RequestDispatcher.include(ServletRequest, ServletResponse) is given as DispatcherType.FORWARD or DispatcherType.INCLUDE, respectively, while the dispatcher type of an asynchronous request dispatched via one of the AsyncContext.dispatch() methods is given as DispatcherType.ASYNC. Finally, the dispatcher type of a request dispatched to an error page by the container's error handling mechanism is given as DispatcherType.ERROR.

指定者：

接口 ServletRequest 中的 getDispatcherType

返回：

the dispatcher type of this request

另请参见：

DispatcherType

getHeader

public String getHeader(String name)

从接口 HttpServletRequest 复制的描述

Returns the value of the specified request header as a String. If the request did not include a header of the specified name, this method returns null. If there are multiple headers with the same name, this method returns the first head in the request. The header name is case insensitive. You can use this method with any request header.

指定者：

接口 HttpServletRequest 中的 getHeader

参数：

name - a String specifying the header name

返回：

a String containing the value of the requested header, or null if the request does not have a header of that name

getHeaderNames

public Enumeration getHeaderNames()

从接口 HttpServletRequest 复制的描述

Returns an enumeration of all the header names this request contains. If the request has no headers, this method returns an empty enumeration.

Some servlet containers do not allow servlets to access headers using this method, in which case this method returns null

指定者：

接口 HttpServletRequest 中的 getHeaderNames

返回：

an enumeration of all the header names sent with this request; if the request has no headers, an empty enumeration; if the servlet container does not allow servlets to use this method, null

getHeaders

public Enumeration getHeaders(String name)

从接口 HttpServletRequest 复制的描述

Returns all the values of the specified request header as an Enumeration of String objects.

Some headers, such as Accept-Language can be sent by clients as several headers each with a different value rather than sending the header as a comma separated list.

If the request did not include any headers of the specified name, this method returns an empty Enumeration. The header name is case insensitive. You can use this method with any request header.

指定者：

接口 HttpServletRequest 中的 getHeaders

参数：

name - a String specifying the header name

返回：

an Enumeration containing the values of the requested header. If the request does not have any headers of that name return an empty enumeration. If the container does not allow access to header information, return null

getInputState

public int getInputState()

返回：

Returns the inputState.

getInputStream

public ServletInputStream getInputStream()
                                  throws IOException

从接口 ServletRequest 复制的描述

Retrieves the body of the request as binary data using a ServletInputStream. Either this method or ServletRequest.getReader() may be called to read the body, not both.

指定者：

接口 ServletRequest 中的 getInputStream

返回：

a ServletInputStream object containing the body of the request

抛出：

IOException - if an input or output exception occurred

getIntHeader

public int getIntHeader(String name)

从接口 HttpServletRequest 复制的描述

Returns the value of the specified request header as an int. If the request does not have a header of the specified name, this method returns -1. If the header cannot be converted to an integer, this method throws a NumberFormatException.

The header name is case insensitive.

指定者：

接口 HttpServletRequest 中的 getIntHeader

参数：

name - a String specifying the name of a request header

返回：

an integer expressing the value of the request header or -1 if the request doesn't have a header of this name

getLocalAddr

public String getLocalAddr()

从接口 ServletRequest 复制的描述

Returns the Internet Protocol (IP) address of the interface on which the request was received.

指定者：

接口 ServletRequest 中的 getLocalAddr

返回：

a String containing the IP address on which the request was received.

getLocale

public Locale getLocale()

从接口 ServletRequest 复制的描述

Returns the preferred Locale that the client will accept content in, based on the Accept-Language header. If the client request doesn't provide an Accept-Language header, this method returns the default locale for the server.

指定者：

接口 ServletRequest 中的 getLocale

返回：

the preferred Locale for the client

getLocales

public Enumeration getLocales()

从接口 ServletRequest 复制的描述

Returns an Enumeration of Locale objects indicating, in decreasing order starting with the preferred locale, the locales that are acceptable to the client based on the Accept-Language header. If the client request doesn't provide an Accept-Language header, this method returns an Enumeration containing one Locale, the default locale for the server.

指定者：

接口 ServletRequest 中的 getLocales

返回：

an Enumeration of preferred Locale objects for the client

getLocalName

public String getLocalName()

从接口 ServletRequest 复制的描述

Returns the host name of the Internet Protocol (IP) interface on which the request was received.

指定者：

接口 ServletRequest 中的 getLocalName

返回：

a String containing the host name of the IP on which the request was received.

getLocalPort

public int getLocalPort()

从接口 ServletRequest 复制的描述

Returns the Internet Protocol (IP) port number of the interface on which the request was received.

指定者：

接口 ServletRequest 中的 getLocalPort

返回：

an integer specifying the port number

getMethod

public String getMethod()

从接口 HttpServletRequest 复制的描述

Returns the name of the HTTP method with which this request was made, for example, GET, POST, or PUT. Same as the value of the CGI variable REQUEST_METHOD.

指定者：

接口 HttpServletRequest 中的 getMethod

返回：

a String specifying the name of the method with which this request was made

getParameter

public String getParameter(String name)

从接口 ServletRequest 复制的描述

Returns the value of a request parameter as a String, or null if the parameter does not exist. Request parameters are extra information sent with the request. For HTTP servlets, parameters are contained in the query string or posted form data.

You should only use this method when you are sure the parameter has only one value. If the parameter might have more than one value, use ServletRequest.getParameterValues(java.lang.String).

If you use this method with a multivalued parameter, the value returned is equal to the first value in the array returned by getParameterValues.

If the parameter data was sent in the request body, such as occurs with an HTTP POST request, then reading the body directly via ServletRequest.getInputStream() or ServletRequest.getReader() can interfere with the execution of this method.

指定者：

接口 ServletRequest 中的 getParameter

参数：

name - a String specifying the name of the parameter

返回：

a String representing the single value of the parameter

另请参见：

ServletRequest.getParameterValues(java.lang.String)

getParameterMap

public Map getParameterMap()

从接口 ServletRequest 复制的描述

Returns a java.util.Map of the parameters of this request.

Request parameters are extra information sent with the request. For HTTP servlets, parameters are contained in the query string or posted form data.

指定者：

接口 ServletRequest 中的 getParameterMap

返回：

an immutable java.util.Map containing parameter names as keys and parameter values as map values. The keys in the parameter map are of type String. The values in the parameter map are of type String array.

getParameterNames

public Enumeration getParameterNames()

从接口 ServletRequest 复制的描述

Returns an Enumeration of String objects containing the names of the parameters contained in this request. If the request has no parameters, the method returns an empty Enumeration.

指定者：

接口 ServletRequest 中的 getParameterNames

返回：

an Enumeration of String objects, each String containing the name of a request parameter; or an empty Enumeration if the request has no parameters

getParameters

public MultiMap<String> getParameters()

返回：

Returns the parameters.

getParameterValues

public String[] getParameterValues(String name)

从接口 ServletRequest 复制的描述

Returns an array of String objects containing all of the values the given request parameter has, or null if the parameter does not exist.

If the parameter has a single value, the array has a length of 1.

指定者：

接口 ServletRequest 中的 getParameterValues

参数：

name - a String containing the name of the parameter whose value is requested

返回：

an array of String objects containing the parameter's values

另请参见：

ServletRequest.getParameter(java.lang.String)

getPathInfo

public String getPathInfo()

从接口 HttpServletRequest 复制的描述

Returns any extra path information associated with the URL the client sent when it made this request. The extra path information follows the servlet path but precedes the query string and will start with a "/" character.

This method returns null if there was no extra path information.

Same as the value of the CGI variable PATH_INFO.

指定者：

接口 HttpServletRequest 中的 getPathInfo

返回：

a String, decoded by the web container, specifying extra path information that comes after the servlet path but before the query string in the request URL; or null if the URL does not have any extra path information

getPathTranslated

public String getPathTranslated()

从接口 HttpServletRequest 复制的描述

Returns any extra path information after the servlet name but before the query string, and translates it to a real path. Same as the value of the CGI variable PATH_TRANSLATED.

If the URL does not have any extra path information, this method returns null or the servlet container cannot translate the virtual path to a real path for any reason (such as when the web application is executed from an archive). The web container does not decode this string.

指定者：

接口 HttpServletRequest 中的 getPathTranslated

返回：

a String specifying the real path, or null if the URL does not have any extra path information

getProtocol

public String getProtocol()

从接口 ServletRequest 复制的描述

Returns the name and version of the protocol the request uses in the form protocol/majorVersion.minorVersion, for example, HTTP/1.1. For HTTP servlets, the value returned is the same as the value of the CGI variable SERVER_PROTOCOL.

指定者：

接口 ServletRequest 中的 getProtocol

返回：

a String containing the protocol name and version number

getQueryEncoding

public String getQueryEncoding()

getQueryString

public String getQueryString()

从接口 HttpServletRequest 复制的描述

Returns the query string that is contained in the request URL after the path. This method returns null if the URL does not have a query string. Same as the value of the CGI variable QUERY_STRING.

指定者：

接口 HttpServletRequest 中的 getQueryString

返回：

a String containing the query string or null if the URL contains no query string. The value is not decoded by the container.

getReader

public BufferedReader getReader()
                         throws IOException

从接口 ServletRequest 复制的描述

Retrieves the body of the request as character data using a BufferedReader. The reader translates the character data according to the character encoding used on the body. Either this method or ServletRequest.getInputStream() may be called to read the body, not both.

指定者：

接口 ServletRequest 中的 getReader

返回：

a BufferedReader containing the body of the request

抛出：

UnsupportedEncodingException - if the character set encoding used is not supported and the text cannot be decoded

IOException - if an input or output exception occurred

另请参见：

ServletRequest.getInputStream()

getRealPath

public String getRealPath(String path)

指定者：

接口 ServletRequest 中的 getRealPath

getRemoteAddr

public String getRemoteAddr()

从接口 ServletRequest 复制的描述

Returns the Internet Protocol (IP) address of the client or last proxy that sent the request. For HTTP servlets, same as the value of the CGI variable REMOTE_ADDR.

指定者：

接口 ServletRequest 中的 getRemoteAddr

返回：

a String containing the IP address of the client that sent the request

getRemoteHost

public String getRemoteHost()

从接口 ServletRequest 复制的描述

Returns the fully qualified name of the client or the last proxy that sent the request. If the engine cannot or chooses not to resolve the hostname (to improve performance), this method returns the dotted-string form of the IP address. For HTTP servlets, same as the value of the CGI variable REMOTE_HOST.

指定者：

接口 ServletRequest 中的 getRemoteHost

返回：

a String containing the fully qualified name of the client

getRemotePort

public int getRemotePort()

从接口 ServletRequest 复制的描述

Returns the Internet Protocol (IP) source port of the client or last proxy that sent the request.

指定者：

接口 ServletRequest 中的 getRemotePort

返回：

an integer specifying the port number

getRemoteUser

public String getRemoteUser()

从接口 HttpServletRequest 复制的描述

Returns the login of the user making this request, if the user has been authenticated, or null if the user has not been authenticated. Whether the user name is sent with each subsequent request depends on the browser and type of authentication. Same as the value of the CGI variable REMOTE_USER.

指定者：

接口 HttpServletRequest 中的 getRemoteUser

返回：

a String specifying the login of the user making this request, or null if the user login is not known

getRequestDispatcher

public RequestDispatcher getRequestDispatcher(String path)

从接口 ServletRequest 复制的描述

Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path. A RequestDispatcher object can be used to forward a request to the resource or to include the resource in a response. The resource can be dynamic or static.

The pathname specified may be relative, although it cannot extend outside the current servlet context. If the path begins with a "/" it is interpreted as relative to the current context root. This method returns null if the servlet container cannot return a RequestDispatcher.

The difference between this method and ServletContext.getRequestDispatcher(java.lang.String) is that this method can take a relative path.

指定者：

接口 ServletRequest 中的 getRequestDispatcher

参数：

path - a String specifying the pathname to the resource. If it is relative, it must be relative against the current servlet.

返回：

a RequestDispatcher object that acts as a wrapper for the resource at the specified path, or null if the servlet container cannot return a RequestDispatcher

另请参见：

RequestDispatcher, ServletContext.getRequestDispatcher(java.lang.String)

getRequestedSessionId

public String getRequestedSessionId()

从接口 HttpServletRequest 复制的描述

Returns the session ID specified by the client. This may not be the same as the ID of the current valid session for this request. If the client did not specify a session ID, this method returns null.

指定者：

接口 HttpServletRequest 中的 getRequestedSessionId

返回：

a String specifying the session ID, or null if the request did not specify a session ID

另请参见：

HttpServletRequest.isRequestedSessionIdValid()

getRequestURI

public String getRequestURI()

从接口 HttpServletRequest 复制的描述

Returns the part of this request's URL from the protocol name up to the query string in the first line of the HTTP request. The web container does not decode this String. For example:

First line of HTTP request	Returned Value
POST /some/path.html HTTP/1.1		/some/path.html
GET http://foo.bar/a.html HTTP/1.0		/a.html
HEAD /xyz?a=b HTTP/1.1		/xyz

To reconstruct an URL with a scheme and host, use HttpUtils.getRequestURL(javax.servlet.http.HttpServletRequest).

指定者：

接口 HttpServletRequest 中的 getRequestURI

返回：

a String containing the part of the URL from the protocol name up to the query string

另请参见：

HttpUtils.getRequestURL(javax.servlet.http.HttpServletRequest)

getRequestURL

public StringBuffer getRequestURL()

从接口 HttpServletRequest 复制的描述

Reconstructs the URL the client used to make the request. The returned URL contains a protocol, server name, port number, and server path, but it does not include query string parameters.

If this request has been forwarded using RequestDispatcher.forward(javax.servlet.ServletRequest, javax.servlet.ServletResponse), the server path in the reconstructed URL must reflect the path used to obtain the RequestDispatcher, and not the server path specified by the client.

Because this method returns a StringBuffer, not a string, you can modify the URL easily, for example, to append query parameters.

This method is useful for creating redirect messages and for reporting errors.

指定者：

接口 HttpServletRequest 中的 getRequestURL

返回：

a StringBuffer object containing the reconstructed URL

getResponse

public Response getResponse()

getRootURL

public StringBuilder getRootURL()

Reconstructs the URL the client used to make the request. The returned URL contains a protocol, server name, port number, and, but it does not include a path.

Because this method returns a StringBuffer, not a string, you can modify the URL easily, for example, to append path and query parameters. This method is useful for creating redirect messages and for reporting errors.

返回：

"scheme://host:port"

getScheme

public String getScheme()

从接口 ServletRequest 复制的描述

Returns the name of the scheme used to make this request, for example, http, https, or ftp. Different schemes have different rules for constructing URLs, as noted in RFC 1738.

指定者：

接口 ServletRequest 中的 getScheme

返回：

a String containing the name of the scheme used to make this request

getServerName

public String getServerName()

从接口 ServletRequest 复制的描述

Returns the host name of the server to which the request was sent. It is the value of the part before ":" in the Host header value, if any, or the resolved server name, or the server IP address.

指定者：

接口 ServletRequest 中的 getServerName

返回：

a String containing the name of the server

getServerPort

public int getServerPort()

从接口 ServletRequest 复制的描述

Returns the port number to which the request was sent. It is the value of the part after ":" in the Host header value, if any, or the server port where the client connection was accepted on.

指定者：

接口 ServletRequest 中的 getServerPort

返回：

an integer specifying the port number

getServletContext

public ServletContext getServletContext()

从接口 ServletRequest 复制的描述

Gets the servlet context to which this ServletRequest was last dispatched.

指定者：

接口 ServletRequest 中的 getServletContext

返回：

the servlet context to which this ServletRequest was last dispatched

getServletName

public String getServletName()

getServletPath

public String getServletPath()

从接口 HttpServletRequest 复制的描述

Returns the part of this request's URL that calls the servlet. This path starts with a "/" character and includes either the servlet name or a path to the servlet, but does not include any extra path information or a query string. Same as the value of the CGI variable SCRIPT_NAME.

This method will return an empty string ("") if the servlet used to process this request was matched using the "/*" pattern.

指定者：

接口 HttpServletRequest 中的 getServletPath

返回：

a String containing the name or path of the servlet being called, as specified in the request URL, decoded, or an empty string if the servlet used to process the request is matched using the "/*" pattern.

getServletResponse

public ServletResponse getServletResponse()

getSession

public HttpSession getSession()

从接口 HttpServletRequest 复制的描述

Returns the current session associated with this request, or if the request does not have a session, creates one.

指定者：

接口 HttpServletRequest 中的 getSession

返回：

the HttpSession associated with this request

另请参见：

HttpServletRequest.getSession(boolean)

getSession

public HttpSession getSession(boolean create)

从接口 HttpServletRequest 复制的描述

Returns the current HttpSession associated with this request or, if there is no current session and create is true, returns a new session.

If create is false and the request has no valid HttpSession, this method returns null.

To make sure the session is properly maintained, you must call this method before the response is committed. If the container is using cookies to maintain session integrity and is asked to create a new session when the response is committed, an IllegalStateException is thrown.

指定者：

接口 HttpServletRequest 中的 getSession

参数：

create - true to create a new session for this request if necessary; false to return null if there's no current session

返回：

the HttpSession associated with this request or null if create is false and the request has no valid session

另请参见：

HttpServletRequest.getSession()

getSessionManager

public SessionManager getSessionManager()

返回：

Returns the sessionManager.

getTimeStamp

public long getTimeStamp()

Get Request TimeStamp

返回：

The time that the request was received.

getTimeStampBuffer

public Buffer getTimeStampBuffer()

Get Request TimeStamp

返回：

The time that the request was received.

getUri

public HttpURI getUri()

返回：

Returns the uri.

getUserIdentity

public UserIdentity getUserIdentity()

getResolvedUserIdentity

public UserIdentity getResolvedUserIdentity()

返回：

The resolved user Identity, which may be null if the Authentication is not Authentication.User (eg. Authentication.Deferred).

getUserIdentityScope

public UserIdentity.Scope getUserIdentityScope()

getUserPrincipal

public Principal getUserPrincipal()

从接口 HttpServletRequest 复制的描述

Returns a java.security.Principal object containing the name of the current authenticated user. If the user has not been authenticated, the method returns null.

指定者：

接口 HttpServletRequest 中的 getUserPrincipal

返回：

a java.security.Principal containing the name of the user making this request; null if the user has not been authenticated

getDispatchTime

public long getDispatchTime()

Get timestamp of the request dispatch

返回：

timestamp

isHandled

public boolean isHandled()

isAsyncStarted

public boolean isAsyncStarted()

从接口 ServletRequest 复制的描述

Checks if this request has been put into asynchronous mode.

A ServletRequest is put into asynchronous mode by calling ServletRequest.startAsync() or ServletRequest.startAsync(ServletRequest,ServletResponse) on it.

This method returns false if this request was put into asynchronous mode, but has since been dispatched using one of the AsyncContext.dispatch() methods or released from asynchronous mode via a call to AsyncContext.complete().

指定者：

接口 ServletRequest 中的 isAsyncStarted

返回：

true if this request has been put into asynchronous mode, false otherwise

isAsyncSupported

public boolean isAsyncSupported()

从接口 ServletRequest 复制的描述

Checks if this request supports asynchronous operation.

Asynchronous operation is disabled for this request if this request is within the scope of a filter or servlet that has not been annotated or flagged in the deployment descriptor as being able to support asynchronous handling.

指定者：

接口 ServletRequest 中的 isAsyncSupported

返回：

true if this request supports asynchronous operation, false otherwise

isRequestedSessionIdFromCookie

public boolean isRequestedSessionIdFromCookie()

从接口 HttpServletRequest 复制的描述

Checks whether the requested session ID came in as a cookie.

指定者：

接口 HttpServletRequest 中的 isRequestedSessionIdFromCookie

返回：

true if the session ID came in as a cookie; otherwise, false

另请参见：

HttpServletRequest.getSession(boolean)

isRequestedSessionIdFromUrl

public boolean isRequestedSessionIdFromUrl()

指定者：

接口 HttpServletRequest 中的 isRequestedSessionIdFromUrl

isRequestedSessionIdFromURL

public boolean isRequestedSessionIdFromURL()

从接口 HttpServletRequest 复制的描述

Checks whether the requested session ID came in as part of the request URL.

指定者：

接口 HttpServletRequest 中的 isRequestedSessionIdFromURL

返回：

true if the session ID came in as part of a URL; otherwise, false

另请参见：

HttpServletRequest.getSession(boolean)

isRequestedSessionIdValid

public boolean isRequestedSessionIdValid()

从接口 HttpServletRequest 复制的描述

Checks whether the requested session ID is still valid.

If the client did not specify any session ID, this method returns false.

指定者：

接口 HttpServletRequest 中的 isRequestedSessionIdValid

返回：

true if this request has an id for a valid session in the current session context; false otherwise

另请参见：

HttpServletRequest.getRequestedSessionId(), HttpServletRequest.getSession(boolean), HttpSessionContext

isSecure

public boolean isSecure()

从接口 ServletRequest 复制的描述

Returns a boolean indicating whether this request was made using a secure channel, such as HTTPS.

指定者：

接口 ServletRequest 中的 isSecure

返回：

a boolean indicating if the request was made using a secure channel

isUserInRole

public boolean isUserInRole(String role)

从接口 HttpServletRequest 复制的描述

Returns a boolean indicating whether the authenticated user is included in the specified logical "role". Roles and role membership can be defined using deployment descriptors. If the user has not been authenticated, the method returns false.

指定者：

接口 HttpServletRequest 中的 isUserInRole

参数：

role - a String specifying the name of the role

返回：

a boolean indicating whether the user making this request belongs to a given role; false if the user has not been authenticated

recoverNewSession

public HttpSession recoverNewSession(Object key)

recycle

protected void recycle()

removeAttribute

public void removeAttribute(String name)

从接口 ServletRequest 复制的描述

Removes an attribute from this request. This method is not generally needed as attributes only persist as long as the request is being handled.

Attribute names should follow the same conventions as package names. Names beginning with java.*, javax.*, and com.sun.*, are reserved for use by Sun Microsystems.

指定者：

接口 ServletRequest 中的 removeAttribute

参数：

name - a String specifying the name of the attribute to remove

removeEventListener

public void removeEventListener(EventListener listener)

saveNewSession

public void saveNewSession(Object key,
                           HttpSession session)

setAsyncSupported

public void setAsyncSupported(boolean supported)

setAttribute

public void setAttribute(String name,
                         Object value)

从接口 ServletRequest 复制的描述

Stores an attribute in this request. Attributes are reset between requests. This method is most often used in conjunction with RequestDispatcher.

Attribute names should follow the same conventions as package names. Names beginning with java.*, javax.*, and com.sun.*, are reserved for use by Sun Microsystems.
If the object passed in is null, the effect is the same as calling ServletRequest.removeAttribute(java.lang.String).
It is warned that when the request is dispatched from the servlet resides in a different web application by RequestDispatcher, the object set by this method may not be correctly retrieved in the caller servlet.

指定者：

接口 ServletRequest 中的 setAttribute

参数：

name - a String specifying the name of the attribute

value - the Object to be stored

setAttributes

public void setAttributes(Attributes attributes)

setAuthentication

public void setAuthentication(Authentication authentication)

Set the authentication.

参数：

authentication - the authentication to set

setCharacterEncoding

public void setCharacterEncoding(String encoding)
                          throws UnsupportedEncodingException

从接口 ServletRequest 复制的描述

Overrides the name of the character encoding used in the body of this request. This method must be called prior to reading request parameters or reading input using getReader(). Otherwise, it has no effect.

指定者：

接口 ServletRequest 中的 setCharacterEncoding

参数：

encoding - String containing the name of the character encoding.

抛出：

UnsupportedEncodingException - if this ServletRequest is still in a state where a character encoding may be set, but the specified encoding is invalid

setCharacterEncodingUnchecked

public void setCharacterEncodingUnchecked(String encoding)

setConnection

protected final void setConnection(AbstractHttpConnection connection)

setContentType

public void setContentType(String contentType)

setContext

public void setContext(ContextHandler.Context context)

Set request context

参数：

context - context object

takeNewContext

public boolean takeNewContext()

返回：

True if this is the first call of takeNewContext() since the last setContext(org.eclipse.jetty.server.handler.ContextHandler.Context) call.

setContextPath

public void setContextPath(String contextPath)

Sets the "context path" for this request

另请参见：

HttpServletRequest.getContextPath()

setCookies

public void setCookies(Cookie[] cookies)

参数：

cookies - The cookies to set.

setDispatcherType

public void setDispatcherType(DispatcherType type)

setHandled

public void setHandled(boolean h)

setMethod

public void setMethod(String method)

参数：

method - The method to set.

setParameters

public void setParameters(MultiMap<String> parameters)

参数：

parameters - The parameters to set.

setPathInfo

public void setPathInfo(String pathInfo)

参数：

pathInfo - The pathInfo to set.

setProtocol

public void setProtocol(String protocol)

参数：

protocol - The protocol to set.

setQueryEncoding

public void setQueryEncoding(String queryEncoding)

Set the character encoding used for the query string. This call will effect the return of getQueryString and getParamaters. It must be called before any geParameter methods. The request attribute "org.eclipse.jetty.server.server.Request.queryEncoding" may be set as an alternate method of calling setQueryEncoding.

参数：

queryEncoding -

setQueryString

public void setQueryString(String queryString)

参数：

queryString - The queryString to set.

setRemoteAddr

public void setRemoteAddr(String addr)

参数：

addr - The address to set.

setRemoteHost

public void setRemoteHost(String host)

参数：

host - The host to set.

setRequestedSessionId

public void setRequestedSessionId(String requestedSessionId)

参数：

requestedSessionId - The requestedSessionId to set.

setRequestedSessionIdFromCookie

public void setRequestedSessionIdFromCookie(boolean requestedSessionIdCookie)

参数：

requestedSessionIdCookie - The requestedSessionIdCookie to set.

setRequestURI

public void setRequestURI(String requestURI)

参数：

requestURI - The requestURI to set.

setScheme

public void setScheme(String scheme)

参数：

scheme - The scheme to set.

setServerName

public void setServerName(String host)

参数：

host - The host to set.

setServerPort

public void setServerPort(int port)

参数：

port - The port to set.

setServletPath

public void setServletPath(String servletPath)

参数：

servletPath - The servletPath to set.

setSession

public void setSession(HttpSession session)

参数：

session - The session to set.

setSessionManager

public void setSessionManager(SessionManager sessionManager)

参数：

sessionManager - The sessionManager to set.

setTimeStamp

public void setTimeStamp(long ts)

setUri

public void setUri(HttpURI uri)

参数：

uri - The uri to set.

setUserIdentityScope

public void setUserIdentityScope(UserIdentity.Scope scope)

setDispatchTime

public void setDispatchTime(long value)

Set timetstamp of request dispatch

参数：

value - timestamp

startAsync

public AsyncContext startAsync()
                        throws IllegalStateException

从接口 ServletRequest 复制的描述

Puts this request into asynchronous mode, and initializes its AsyncContext with the original (unwrapped) ServletRequest and ServletResponse objects.

Calling this method will cause committal of the associated response to be delayed until AsyncContext.complete() is called on the returned AsyncContext, or the asynchronous operation has timed out.

Calling AsyncContext.hasOriginalRequestAndResponse() on the returned AsyncContext will return true. Any filters invoked in the outbound direction after this request was put into asynchronous mode may use this as an indication that any request and/or response wrappers that they added during their inbound invocation need not stay around for the duration of the asynchronous operation, and therefore any of their associated resources may be released.

This method clears the list of AsyncListener instances (if any) that were registered with the AsyncContext returned by the previous call to one of the startAsync methods, after calling each AsyncListener at its onStartAsync method.

Subsequent invocations of this method, or its overloaded variant, will return the same AsyncContext instance, reinitialized as appropriate.

指定者：

接口 ServletRequest 中的 startAsync

返回：

the (re)initialized AsyncContext

抛出：

IllegalStateException - if this request is within the scope of a filter or servlet that does not support asynchronous operations (that is, ServletRequest.isAsyncSupported() returns false), or if this method is called again without any asynchronous dispatch (resulting from one of the AsyncContext.dispatch() methods), is called outside the scope of any such dispatch, or is called again within the scope of the same dispatch, or if the response has already been closed

startAsync

public AsyncContext startAsync(ServletRequest servletRequest,
                               ServletResponse servletResponse)
                        throws IllegalStateException

从接口 ServletRequest 复制的描述

Puts this request into asynchronous mode, and initializes its AsyncContext with the given request and response objects.

The ServletRequest and ServletResponse arguments must be the same instances, or instances of ServletRequestWrapper and ServletResponseWrapper that wrap them, that were passed to the service method of the Servlet or the doFilter method of the Filter, respectively, in whose scope this method is being called.

Calling this method will cause committal of the associated response to be delayed until AsyncContext.complete() is called on the returned AsyncContext, or the asynchronous operation has timed out.

Calling AsyncContext.hasOriginalRequestAndResponse() on the returned AsyncContext will return false, unless the passed in ServletRequest and ServletResponse arguments are the original ones or do not carry any application-provided wrappers. Any filters invoked in the outbound direction after this request was put into asynchronous mode may use this as an indication that some of the request and/or response wrappers that they added during their inbound invocation may need to stay in place for the duration of the asynchronous operation, and their associated resources may not be released. A ServletRequestWrapper applied during the inbound invocation of a filter may be released by the outbound invocation of the filter only if the given servletRequest, which is used to initialize the AsyncContext and will be returned by a call to AsyncContext.getRequest(), does not contain said ServletRequestWrapper. The same holds true for ServletResponseWrapper instances.

This method clears the list of AsyncListener instances (if any) that were registered with the AsyncContext returned by the previous call to one of the startAsync methods, after calling each AsyncListener at its onStartAsync method.

Subsequent invocations of this method, or its zero-argument variant, will return the same AsyncContext instance, reinitialized as appropriate. If a call to this method is followed by a call to its zero-argument variant, the specified (and possibly wrapped) request and response objects will remain locked in on the returned AsyncContext.

指定者：

接口 ServletRequest 中的 startAsync

参数：

servletRequest - the ServletRequest used to initialize the AsyncContext

servletResponse - the ServletResponse used to initialize the AsyncContext

返回：

the (re)initialized AsyncContext

抛出：

IllegalStateException - if this request is within the scope of a filter or servlet that does not support asynchronous operations (that is, ServletRequest.isAsyncSupported() returns false), or if this method is called again without any asynchronous dispatch (resulting from one of the AsyncContext.dispatch() methods), is called outside the scope of any such dispatch, or is called again within the scope of the same dispatch, or if the response has already been closed

toString

public String toString()

覆盖：

类 Object 中的 toString

authenticate

public boolean authenticate(HttpServletResponse response)
                     throws IOException,
                            ServletException

从接口 HttpServletRequest 复制的描述

Use the container login mechanism configured for the ServletContext to authenticate the user making this request.

This method may modify and commit the argument HttpServletResponse.

指定者：

接口 HttpServletRequest 中的 authenticate

参数：

response - The HttpServletResponse associated with this HttpServletRequest

返回：

true when non-null values were or have been established as the values returned by getUserPrincipal, getRemoteUser, and getAuthType. Return false if authentication is incomplete and the underlying login mechanism has committed, in the response, the message (e.g., challenge) and HTTP status code to be returned to the user.

抛出：

IOException - if an input or output error occurred while reading from this request or writing to the given response

ServletException - if the authentication failed and the caller is responsible for handling the error (i.e., the underlying login mechanism did NOT establish the message and HTTP status code to be returned to the user)

getPart

public Part getPart(String name)
             throws IOException,
                    ServletException

从接口 HttpServletRequest 复制的描述

Gets the Part with the given name.

指定者：

接口 HttpServletRequest 中的 getPart

参数：

name - the name of the requested Part

返回：

The Part with the given name, or null if this request is of type multipart/form-data, but does not contain the requested Part

抛出：

IOException - if an I/O error occurred during the retrieval of the requested Part

ServletException - if this request is not of type multipart/form-data

另请参见：

MultipartConfig.maxFileSize(), MultipartConfig.maxRequestSize()

getParts

public Collection<Part> getParts()
                          throws IOException,
                                 ServletException

从接口 HttpServletRequest 复制的描述

Gets all the Part components of this request, provided that it is of type multipart/form-data.

If this request is of type multipart/form-data, but does not contain any Part components, the returned Collection will be empty.

Any changes to the returned Collection must not affect this HttpServletRequest.

指定者：

接口 HttpServletRequest 中的 getParts

返回：

a (possibly empty) Collection of the Part components of this request

抛出：

IOException - if an I/O error occurred during the retrieval of the Part components of this request

ServletException - if this request is not of type multipart/form-data

另请参见：

MultipartConfig.maxFileSize(), MultipartConfig.maxRequestSize()

login

public void login(String username,
                  String password)
           throws ServletException

从接口 HttpServletRequest 复制的描述

Validate the provided username and password in the password validation realm used by the web container login mechanism configured for the ServletContext.

This method returns without throwing a ServletException when the login mechanism configured for the ServletContext supports username password validation, and when, at the time of the call to login, the identity of the caller of the request had not been established (i.e, all of getUserPrincipal, getRemoteUser, and getAuthType return null), and when validation of the provided credentials is successful. Otherwise, this method throws a ServletException as described below.

When this method returns without throwing an exception, it must have established non-null values as the values returned by getUserPrincipal, getRemoteUser, and getAuthType.

指定者：

接口 HttpServletRequest 中的 login

参数：

username - The String value corresponding to the login identifier of the user.

password - The password String corresponding to the identified user.

抛出：

ServletException - if the configured login mechanism does not support username password authentication, or if a non-null caller identity had already been established (prior to the call to login), or if validation of the provided username and password fails.

logout

public void logout()
            throws ServletException

从接口 HttpServletRequest 复制的描述

Establish null as the value returned when getUserPrincipal, getRemoteUser, and getAuthType is called on the request.

指定者：

接口 HttpServletRequest 中的 logout

抛出：

ServletException - if logout fails

mergeQueryString

public void mergeQueryString(String query)

Merge in a new query string. The query string is merged with the existing parameters and setParameters(MultiMap) and setQueryString(String) are called with the result. The merge is according to the rules of the servlet dispatch forward method.

参数：

query - The query string to merge into the request.