javax.servlet.http
类 HttpServletRequestWrapper

java.lang.Object
  javax.servlet.ServletRequestWrapper
      javax.servlet.http.HttpServletRequestWrapper

所有已实现的接口：

HttpServletRequest, ServletRequest

直接已知子类：

FormAuthenticator.FormRequest

public class HttpServletRequestWrapper
extends ServletRequestWrapper
implements HttpServletRequest

Provides a convenient implementation of the HttpServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet.

This class implements the Wrapper or Decorator pattern. Methods default to calling through to the wrapped request object.

从以下版本开始：

Servlet 2.3

另请参见：

HttpServletRequest

字段摘要

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

HttpServletRequestWrapper(HttpServletRequest request)
Constructs a request object wrapping the given request.

方法摘要

boolean	authenticate(HttpServletResponse response) The default behavior of this method is to call authenticate on the wrapped request object.
String	getAuthType() The default behavior of this method is to return getAuthType() on the wrapped request object.
String	getContextPath() The default behavior of this method is to return getContextPath() on the wrapped request object.
Cookie[]	getCookies() The default behavior of this method is to return getCookies() on the wrapped request object.
long	getDateHeader(String name) The default behavior of this method is to return getDateHeader(String name) on the wrapped request object.
String	getHeader(String name) The default behavior of this method is to return getHeader(String name) on the wrapped request object.
Enumeration<String>	getHeaderNames() The default behavior of this method is to return getHeaderNames() on the wrapped request object.
Enumeration<String>	getHeaders(String name) The default behavior of this method is to return getHeaders(String name) on the wrapped request object.
int	getIntHeader(String name) The default behavior of this method is to return getIntHeader(String name) on the wrapped request object.
String	getMethod() The default behavior of this method is to return getMethod() on the wrapped request object.
Part	getPart(String name) The default behavior of this method is to call getPart on the wrapped request object.
Collection<Part>	getParts() The default behavior of this method is to call getParts on the wrapped request object.
String	getPathInfo() The default behavior of this method is to return getPathInfo() on the wrapped request object.
String	getPathTranslated() The default behavior of this method is to return getPathTranslated() on the wrapped request object.
String	getQueryString() The default behavior of this method is to return getQueryString() on the wrapped request object.
String	getRemoteUser() The default behavior of this method is to return getRemoteUser() on the wrapped request object.
String	getRequestedSessionId() The default behavior of this method is to return getRequestedSessionId() on the wrapped request object.
String	getRequestURI() The default behavior of this method is to return getRequestURI() on the wrapped request object.
StringBuffer	getRequestURL() The default behavior of this method is to return getRequestURL() on the wrapped request object.
String	getServletPath() The default behavior of this method is to return getServletPath() on the wrapped request object.
HttpSession	getSession() The default behavior of this method is to return getSession() on the wrapped request object.
HttpSession	getSession(boolean create) The default behavior of this method is to return getSession(boolean create) on the wrapped request object.
Principal	getUserPrincipal() The default behavior of this method is to return getUserPrincipal() on the wrapped request object.
boolean	isRequestedSessionIdFromCookie() The default behavior of this method is to return isRequestedSessionIdFromCookie() on the wrapped request object.
boolean	isRequestedSessionIdFromUrl() The default behavior of this method is to return isRequestedSessionIdFromUrl() on the wrapped request object.
boolean	isRequestedSessionIdFromURL() The default behavior of this method is to return isRequestedSessionIdFromURL() on the wrapped request object.
boolean	isRequestedSessionIdValid() The default behavior of this method is to return isRequestedSessionIdValid() on the wrapped request object.
boolean	isUserInRole(String role) The default behavior of this method is to return isUserInRole(String role) on the wrapped request object.
void	login(String username, String password) The default behavior of this method is to call login on the wrapped request object.
void	logout() The default behavior of this method is to call login on the wrapped request object.

从类 javax.servlet.ServletRequestWrapper 继承的方法

getAsyncContext, getAttribute, getAttributeNames, getCharacterEncoding, getContentLength, getContentType, getDispatcherType, getInputStream, getLocalAddr, getLocale, getLocales, getLocalName, getLocalPort, getParameter, getParameterMap, getParameterNames, getParameterValues, getProtocol, getReader, getRealPath, getRemoteAddr, getRemoteHost, getRemotePort, getRequest, getRequestDispatcher, getScheme, getServerName, getServerPort, getServletContext, isAsyncStarted, isAsyncSupported, isSecure, isWrapperFor, isWrapperFor, removeAttribute, setAttribute, setCharacterEncoding, setRequest, startAsync, startAsync

从类 java.lang.Object 继承的方法

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

从接口 javax.servlet.ServletRequest 继承的方法

getAsyncContext, getAttribute, getAttributeNames, getCharacterEncoding, getContentLength, getContentType, getDispatcherType, getInputStream, getLocalAddr, getLocale, getLocales, getLocalName, getLocalPort, getParameter, getParameterMap, getParameterNames, getParameterValues, getProtocol, getReader, getRealPath, getRemoteAddr, getRemoteHost, getRemotePort, getRequestDispatcher, getScheme, getServerName, getServerPort, getServletContext, isAsyncStarted, isAsyncSupported, isSecure, removeAttribute, setAttribute, setCharacterEncoding, startAsync, startAsync

构造方法详细信息

HttpServletRequestWrapper

public HttpServletRequestWrapper(HttpServletRequest request)

Constructs a request object wrapping the given request.

抛出：

IllegalArgumentException - if the request is null

方法详细信息

getAuthType

public String getAuthType()

The default behavior of this method is to return getAuthType() on the wrapped request object.

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.

getCookies

public Cookie[] getCookies()

The default behavior of this method is to return getCookies() on the wrapped request object.

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)

The default behavior of this method is to return getDateHeader(String name) on the wrapped request object.

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

getHeader

public String getHeader(String name)

The default behavior of this method is to return getHeader(String name) on the wrapped request object.

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

getHeaders

public Enumeration<String> getHeaders(String name)

The default behavior of this method is to return getHeaders(String name) on the wrapped request object.

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

getHeaderNames

public Enumeration<String> getHeaderNames()

The default behavior of this method is to return getHeaderNames() on the wrapped request object.

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

getIntHeader

public int getIntHeader(String name)

The default behavior of this method is to return getIntHeader(String name) on the wrapped request object.

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

getMethod

public String getMethod()

The default behavior of this method is to return getMethod() on the wrapped request object.

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

getPathInfo

public String getPathInfo()

The default behavior of this method is to return getPathInfo() on the wrapped request object.

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()

The default behavior of this method is to return getPathTranslated() on the wrapped request object.

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

getContextPath

public String getContextPath()

The default behavior of this method is to return getContextPath() on the wrapped request object.

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()

getQueryString

public String getQueryString()

The default behavior of this method is to return getQueryString() on the wrapped request object.

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.

getRemoteUser

public String getRemoteUser()

The default behavior of this method is to return getRemoteUser() on the wrapped request object.

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

isUserInRole

public boolean isUserInRole(String role)

The default behavior of this method is to return isUserInRole(String role) on the wrapped request object.

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

getUserPrincipal

public Principal getUserPrincipal()

The default behavior of this method is to return getUserPrincipal() on the wrapped request object.

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

getRequestedSessionId

public String getRequestedSessionId()

The default behavior of this method is to return getRequestedSessionId() on the wrapped request object.

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()

The default behavior of this method is to return getRequestURI() on the wrapped request object.

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()

The default behavior of this method is to return getRequestURL() on the wrapped request object.

指定者：

接口 HttpServletRequest 中的 getRequestURL

返回：

a StringBuffer object containing the reconstructed URL

getServletPath

public String getServletPath()

The default behavior of this method is to return getServletPath() on the wrapped request object.

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.

getSession

public HttpSession getSession(boolean create)

The default behavior of this method is to return getSession(boolean create) on the wrapped request object.

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()

getSession

public HttpSession getSession()

The default behavior of this method is to return getSession() on the wrapped request object.

指定者：

接口 HttpServletRequest 中的 getSession

返回：

the HttpSession associated with this request

另请参见：

HttpServletRequest.getSession(boolean)

isRequestedSessionIdValid

public boolean isRequestedSessionIdValid()

The default behavior of this method is to return isRequestedSessionIdValid() on the wrapped request object.

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

isRequestedSessionIdFromCookie

public boolean isRequestedSessionIdFromCookie()

The default behavior of this method is to return isRequestedSessionIdFromCookie() on the wrapped request object.

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()

The default behavior of this method is to return isRequestedSessionIdFromURL() on the wrapped request object.

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)

isRequestedSessionIdFromUrl

public boolean isRequestedSessionIdFromUrl()

The default behavior of this method is to return isRequestedSessionIdFromUrl() on the wrapped request object.

指定者：

接口 HttpServletRequest 中的 isRequestedSessionIdFromUrl

authenticate

public boolean authenticate(HttpServletResponse response)
                     throws IOException,
                            ServletException

The default behavior of this method is to call authenticate on the wrapped request object.

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)

从以下版本开始：

Servlet 3.0

login

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

The default behavior of this method is to call login on the wrapped request object.

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.

从以下版本开始：

Servlet 3.0

logout

public void logout()
            throws ServletException

The default behavior of this method is to call login on the wrapped request object.

指定者：

接口 HttpServletRequest 中的 logout

抛出：

ServletException - if logout fails

从以下版本开始：

Servlet 3.0

getParts

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

The default behavior of this method is to call getParts on the wrapped request object.

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

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

从以下版本开始：

Servlet 3.0

另请参见：

MultipartConfig.maxFileSize(), MultipartConfig.maxRequestSize()

getPart

public Part getPart(String name)
             throws IOException,
                    ServletException

The default behavior of this method is to call getPart on the wrapped request object.

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

从以下版本开始：

Servlet 3.0

另请参见：

MultipartConfig.maxFileSize(), MultipartConfig.maxRequestSize()