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javax.faces.context Class ExternalContext
java.lang.Object javax.faces.context.ExternalContext
public abstract class ExternalContext
- extends Object
此类使 Faces API 能够忽略所含应用程序环境的特性。具体来说,此类使基于 JavaServer Faces 的应用程序能够在 Servlet 或 Portlet 环境中运行。
在下文的方法描述中,以 Servlet:和 Portlet: 开头的段落表示针对该特定环境的行为。
This class allows the Faces API to be unaware of the nature of its containing application environment. In particular, this class allows JavaServer Faces based appications to run in either a Servlet or a Portlet environment.
In the method descriptions below, paragraphs starting with Servlet: and Portlet: denote behavior that is specific to that particular environment.
Field Summary | |
---|---|
static String |
BASIC_AUTH
String identifier for BASIC authentication. |
static String |
CLIENT_CERT_AUTH
String identifier for CLIENT_CERT authentication. |
static String |
DIGEST_AUTH
String identifier for DIGEST authentication. |
static String |
FORM_AUTH
String identifier for FORM authentication. |
Constructor Summary | |
---|---|
ExternalContext()
|
Method Summary | |
---|---|
abstract void |
dispatch(String path)
Dispatch a request to the specified resource to create output for this response. |
abstract String |
encodeActionURL(String url)
Return the input URL, after performing any rewriting needed to ensure that it will correctly identify an addressable action in the current application. |
abstract String |
encodeNamespace(String name)
Return the specified name, after prefixing it with a namespace that ensures that it will be unique within the context of a particular page. |
abstract String |
encodeResourceURL(String url)
Return the input URL, after performing any rewriting needed to ensure that it will correctly identify an addressable resource in the current application. |
abstract Map<String,Object> |
getApplicationMap()
Return a mutable Map representing the application
scope attributes for the current application. |
abstract String |
getAuthType()
Return the name of the authentication scheme used to authenticate the current user, if any; otherwise, return null . |
abstract Object |
getContext()
Return the application environment object instance for the current appication. |
abstract String |
getInitParameter(String name)
Return the value of the specified application initialization parameter (if any). |
abstract Map |
getInitParameterMap()
Return an immutable Map whose keys are the set of
application initialization parameter names configured for this
application, and whose values are the corresponding parameter
values. |
abstract String |
getRemoteUser()
Return the login name of the user making the current request if any; otherwise, return null . |
abstract Object |
getRequest()
Return the environment-specific object instance for the current request. |
String |
getRequestCharacterEncoding()
Return the character encoding currently being used to interpret this request. |
String |
getRequestContentType()
Return the MIME Content-Type for this request. |
abstract String |
getRequestContextPath()
Return the portion of the request URI that identifies the web application context for this request. |
abstract Map<String,Object> |
getRequestCookieMap()
Return an immutable Map whose keys are the set of
cookie names included in the current request, and whose
values (of type javax.servlet.http.Cookie )
are the first (or only) cookie for each cookie name
returned by the underlying request. |
abstract Map<String,String> |
getRequestHeaderMap()
Return an immutable Map whose keys are the set of
request header names included in the current request, and whose
values (of type String) are the first (or only) value for each
header name returned by the underlying request. |
abstract Map<String,String[]> |
getRequestHeaderValuesMap()
Return an immutable Map whose keys are the set of
request header names included in the current request, and whose
values (of type String[]) are all of the value for each
header name returned by the underlying request. |
abstract Locale |
getRequestLocale()
Return the preferred Locale in which the client
will accept content. |
abstract Iterator<Locale> |
getRequestLocales()
Return an Iterator over the preferred
Locale s specified in the request, in decreasing
order of preference. |
abstract Map<String,Object> |
getRequestMap()
Return a mutable Map representing the request
scope attributes for the current application. |
abstract Map<String,String> |
getRequestParameterMap()
Return an immutable Map whose keys are the set of
request parameters names included in the current request, and whose
values (of type String) are the first (or only) value for each
parameter name returned by the underlying request. |
abstract Iterator<String> |
getRequestParameterNames()
Return an Iterator over the names of all request
parameters included in the current request. |
abstract Map<String,String[]> |
getRequestParameterValuesMap()
Return an immutable Map whose keys are the set of
request parameters names included in the current request, and whose
values (of type String[]) are all of the values for each
parameter name returned by the underlying request. |
abstract String |
getRequestPathInfo()
Return the extra path information (if any) included in the request URI; otherwise, return null . |
abstract String |
getRequestServletPath()
Return the servlet path information (if any) included in the request URI; otherwise, return null . |
abstract URL |
getResource(String path)
Return a URL for the application resource mapped to the
specified path, if it exists; otherwise, return null . |
abstract InputStream |
getResourceAsStream(String path)
Return an InputStream for an application resource
mapped to the specified path, if it exists; otherwise, return
null . |
abstract Set<String> |
getResourcePaths(String path)
Return the Set of resource paths for all application
resources whose resource path starts with the specified argument. |
abstract Object |
getResponse()
Return the environment-specific object instance for the current response. |
String |
getResponseCharacterEncoding()
Returns the name of the character encoding (MIME charset) used for the body sent in this response. |
String |
getResponseContentType()
Return the MIME Content-Type for this response. |
abstract Object |
getSession(boolean create)
If the create parameter is true ,
create (if necessary) and return a session instance associated
with the current request. |
abstract Map<String,Object> |
getSessionMap()
Return a mutable Map representing the session
scope attributes for the current application. |
abstract Principal |
getUserPrincipal()
Return the Principal object containing the name of
the current authenticated user, if any; otherwise, return
null . |
abstract boolean |
isUserInRole(String role)
Return true if the currently authenticated user is
included in the specified role. |
abstract void |
log(String message)
Log the specified message to the application object. |
abstract void |
log(String message,
Throwable exception)
Log the specified message and exception to the application object. |
abstract void |
redirect(String url)
Redirect a request to the specified URL, and cause the responseComplete() method to be called on the
FacesContext instance for the current request. |
void |
setRequest(Object request)
Set the environment-specific request to be returned by subsequent calls to getRequest() . |
void |
setRequestCharacterEncoding(String encoding)
Overrides the name of the character encoding used in the body of this request. |
void |
setResponse(Object response)
Set the environment-specific response to be returned by subsequent calls to getResponse() . |
void |
setResponseCharacterEncoding(String encoding)
Sets the character encoding (MIME charset) of the response being sent to the client, for example, to UTF-8. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
英文文档:
BASIC_AUTH
public static final String BASIC_AUTH
String identifier for BASIC authentication.
- See Also:
- Constant Field Values
英文文档:
CLIENT_CERT_AUTH
public static final String CLIENT_CERT_AUTH
String identifier for CLIENT_CERT authentication.
- See Also:
- Constant Field Values
英文文档:
DIGEST_AUTH
public static final String DIGEST_AUTH
String identifier for DIGEST authentication.
- See Also:
- Constant Field Values
英文文档:
FORM_AUTH
public static final String FORM_AUTH
String identifier for FORM authentication.
- See Also:
- Constant Field Values
Constructor Detail |
---|
public
ExternalContext()
英文文档:
ExternalContext
public ExternalContext()
Method Detail |
---|
abstract public void
dispatch(String path) throws java.io.IOException
将请求分发给指定的资源,以为此响应创建输出。
Servlet:要完成此方法,必须首先调用 javax.servlet.ServletContext
方法 getRequestDispatcher(path)
,然后对所得对象调用 forward()
方法。
Portlet:要完成此方法,必须首先调用 javax.portlet.PortletContext
方法 getRequestDispatcher()
,然后对所得对象调用 include()
方法。
path | 指向指定资源的上下文相对路径,必须以斜杠 ("/") 字符开头 |
Throws | FacesException:
如果发生 ServletException 或 PortletException ,则抛出该异常 |
Throws | IllegalArgumentException: 如果无法为指定的路径创建请求分发程序 |
Throws | IllegalStateException:
如果在 portlet 环境中调用此方法,并且当前请求为 ActionRequest ,而不是 RenderRequest |
Throws | java.io.IOException: 如果发生输入/输出错误 |
Throws | NullPointerException:
如果 path 为 null |
dispatch
public abstract void dispatch(String path) throws IOException
Dispatch a request to the specified resource to create output for this response.
Servlet: This must be accomplished by calling the
javax.servlet.ServletContext
methodgetRequestDispatcher(path)
, and calling theforward()
method on the resulting object.Portlet: This must be accomplished by calling the
javax.portlet.PortletContext
methodgetRequestDispatcher()
, and calling theinclude()
method on the resulting object.- Parameters:
path
- Context relative path to the specified resource, which must start with a slash ("/") character- Throws:
FacesException
- thrown if aServletException
orPortletException
occursIllegalArgumentException
- if no request dispatcher can be created for the specified pathIllegalStateException
- if this method is called in a portlet environment, and the current request is anActionRequest
instead of aRenderRequest
IOException
- if an input/output error occursNullPointerException
- ifpath
isnull
abstract public String
encodeActionURL(String url)
执行了任何为确保正确标识当前应用程序中的可寻址操作所需的重写操作之后,返回输入 URL。
Servlet:这必须是 javax.servlet.http.HttpServletResponse
方法 encodeURL(url)
返回的值。
Portlet:这必须是 javax.portlet.PortletResponse
方法 encodeURL(url)
返回的值。
url | 要编码的输入 URL |
Throws | NullPointerException:
如果 url 为 null |
encodeActionURL
public abstract String encodeActionURL(String url)
Return the input URL, after performing any rewriting needed to ensure that it will correctly identify an addressable action in the current application.
Servlet: This must be the value returned by the
javax.servlet.http.HttpServletResponse
methodencodeURL(url)
.Portlet: This must be the value returned by the
javax.portlet.PortletResponse
methodencodeURL(url)
.- Parameters:
url
- The input URL to be encoded- Throws:
NullPointerException
- ifurl
isnull
abstract public String
encodeNamespace(String name)
用名称空间作为其前缀以确保它在特定页面上下文中的唯一性之后,返回指定的名称。
Servlet:必须返回未更改的输入值。
Portlet:返回值必须是以 javax.portlet.RenderResponse
方法 getNamespace()
返回的值为前缀的输入值。
name | 要编码的名称 |
Throws | IllegalStateException:
如果在 portlet 环境中调用此方法,并且当前的响应为 ActionResponse ,而不是 RenderResponse |
Throws | NullPointerException:
如果 name 为 null |
encodeNamespace
public abstract String encodeNamespace(String name)
Return the specified name, after prefixing it with a namespace that ensures that it will be unique within the context of a particular page.
Servlet: The input value must be returned unchanged.
Portlet: The returned value must be the input value prefixed by the value returned by the
javax.portlet.RenderResponse
methodgetNamespace()
.- Parameters:
name
- Name to be encoded- Throws:
IllegalStateException
- if this method is called in a portlet environment, and the current response is anActionResponse
instead of aRenderResponse
NullPointerException
- ifname
isnull
abstract public String
encodeResourceURL(String url)
执行了任何为确保正确标识当前应用程序中的可寻址资源所需的重写操作之后,返回输入 URL。
Servlet:这必须是 javax.servlet.http.HttpServletResponse
方法 encodeURL(url)
返回的值。
Portlet:这必须是 javax.portlet.PortletResponse
方法 encodeURL(url)
返回的值。
url | 要编码的输入 URL |
Throws | NullPointerException:
如果 url 为 null |
encodeResourceURL
public abstract String encodeResourceURL(String url)
Return the input URL, after performing any rewriting needed to ensure that it will correctly identify an addressable resource in the current application.
Servlet: This must be the value returned by the
javax.servlet.http.HttpServletResponse
methodencodeURL(url)
.Portlet: This must be the value returned by the
javax.portlet.PortletResponse
methodencodeURL(url)
.- Parameters:
url
- The input URL to be encoded- Throws:
NullPointerException
- ifurl
isnull
abstract public java.util.Map<K, V>
getApplicationMap()
返回一个可变的 Map
,它代表当前应用程序的应用程序作用域属性。返回的 Map
必须实现可修改映射的整个协定,这在 java.util.Map
的 JavaDoc 中有详细说明。在 Map
中所进行的修改一定会导致在应用程序作用域属性集中进行相应更改。特别是 clear()
、remove()
、put()
、putAll()
和 get()
操作必须对底层数据库结构采取相应的操作。
对于任何导致元素从底层数据结构中删除的 Map
方法,必须采取以下与托管 Bean 有关的操作。如果移除的元素是托管 Bean,并且它有一个或多个使用 javax.annotation.PreDestroy
注释的公共无参数 void 返回方法,则从底层数据结构移除该元素前,必须调用所有这些方法。对于非托管 Bean,但恰好含有使用该注释的方法的元素,移除时不得调用这些方法。PreDestroy
注释的方法所抛出的任何异常都必须被捕获并重新抛出。可以记录异常。
Servlet:这必须是通过 javax.servlet.ServletContext
方法 getAttribute()
、getAttributeNames()
、removeAttribute()
和 setAttribute()
获得的属性集。
Portlet:这必须是通过 javax.portlet.PortletContext
方法 getAttribute()
、getAttributeNames()
、removeAttribute()
和 setAttribute()
获得的属性集。
getApplicationMap
public abstract Map<String,Object> getApplicationMap()
Return a mutable
Map
representing the application scope attributes for the current application. The returnedMap
must implement the entire contract for a modifiable map as described in the JavaDocs forjava.util.Map
. Modifications made in theMap
must cause the corresponding changes in the set of application scope attributes. Particularly theclear()
,remove()
,put()
,putAll()
, andget()
operations must take the appropriate action on the underlying data structure.For any of the
Map
methods that cause an element to be removed from the underlying data structure, the following action regarding managed-beans must be taken. If the element to be removed is a managed-bean, and it has one or more public no-argument void return methods annotated withjavax.annotation.PreDestroy
, each such method must be called before the element is removed from the underlying data structure. Elements that are not managed-beans, but do happen to have methods with that annotation must not have those methods called on removal. Any exception thrown by thePreDestroy
annotated methods must by caught and not rethrown. The exception may be logged.Servlet: This must be the set of attributes available via the
javax.servlet.ServletContext
methodsgetAttribute()
,getAttributeNames()
,removeAttribute()
, andsetAttribute()
.Portlet: This must be the set of attributes available via the
javax.portlet.PortletContext
methodsgetAttribute()
,getAttributeNames()
,removeAttribute()
, andsetAttribute()
.
abstract public String
getAuthType()
返回用于验证当前用户的验证方案的名称(如果有);否则返回 null
。对于标准验证方案,返回值将是以下常量之一:BASIC_AUTH
、CLIENT_CERT_AUTH
、DIGEST_AUTH
或 FORM_AUTH
。
Servlet:这必须是 javax.servlet.http.HttpServletRequest
方法 getAuthType()
返回的值。
Portlet:这必须是 javax.portlet.http.PortletRequest
方法 getAuthType()
返回的值。
getAuthType
public abstract String getAuthType()
Return the name of the authentication scheme used to authenticate the current user, if any; otherwise, return
null
. For standard authentication schemes, the returned value will match one of the following constants:BASIC_AUTH
,CLIENT_CERT_AUTH
,DIGEST_AUTH
, orFORM_AUTH
.Servlet: This must be the value returned by the
javax.servlet.http.HttpServletRequest
methodgetAuthType()
.Portlet: This must be the value returned by the
javax.portlet.http.PortletRequest
methodgetAuthType()
.
abstract public Object
getContext()
返回当前应用程序的应用程序环境对象实例。
Servlet:这必须是当前应用程序的 javax.servlet.ServletContext
实例。
Portlet:这必须是当前应用程序的 javax.portlet.PortletContext
实例。
getContext
public abstract Object getContext()
Return the application environment object instance for the current appication.
Servlet: This must be the current application's
javax.servlet.ServletContext
instance.Portlet: This must be the current application's
javax.portlet.PortletContext
instance.
abstract public String
getInitParameter(String name)
返回指定应用程序初始化参数的值(如果有)。
Servlet:这必须是 javax.servlet.ServletContext
方法 getInitParameter(name)
的结果。
Portlet:这必须是 javax.portlet.PortletContext
方法 getInitParameter(name)
的结果。
name | 请求的初始化参数的名称 |
Throws | NullPointerException:
如果 name 为 null |
getInitParameter
public abstract String getInitParameter(String name)
Return the value of the specified application initialization parameter (if any).
Servlet: This must be the result of the
javax.servlet.ServletContext
methodgetInitParameter(name)
.Portlet: This must be the result of the
javax.portlet.PortletContext
methodgetInitParameter(name)
.- Parameters:
name
- Name of the requested initialization parameter- Throws:
NullPointerException
- ifname
isnull
abstract public java.util.Map<K, V>
getInitParameterMap()
返回一个不可变的 Map
,其键是为此应用程序配置的应用程序初始化参数名称集,其值是相应的参数值。返回的 Map
必须实现不可修改映射的整个协定,这在 java.util.Map
的 JavaDoc 中有详细说明。
Servlet:此方法的结果必须等同于先调用 javax.servlet.ServletContext
方法 getInitParameterNames
,然后在结果中放入配置的所有参数名称/值对。
Portlet:此方法的结果必须等同于先调用 javax.portlet.PortletContext
方法 getInitParameterNames
,然后在结果中放入配置的所有参数名称/值对。
getInitParameterMap
public abstract Map getInitParameterMap()
Return an immutable
Map
whose keys are the set of application initialization parameter names configured for this application, and whose values are the corresponding parameter values. The returnedMap
must implement the entire contract for an unmodifiable map as described in the JavaDocs forjava.util.Map
.Servlet: This result must be as if it were synthesized by calling the
javax.servlet.ServletContext
methodgetInitParameterNames
, and putting each configured parameter name/value pair into the result.Portlet: This result must be as if it were synthesized by calling the
javax.portlet.PortletContext
methodgetInitParameterNames
, and putting each configured parameter name/value pair into the result.
abstract public String
getRemoteUser()
返回作出当前请求的用户的登录名(如果有);否则返回 null
。
Servlet:这必须是 javax.servlet.http.HttpServletRequest
方法 getRemoteUser()
返回的值。
Portlet:这必须是 javax.portlet.http.PortletRequest
方法 getRemoteUser()
返回的值。
getRemoteUser
public abstract String getRemoteUser()
Return the login name of the user making the current request if any; otherwise, return
null
.Servlet: This must be the value returned by the
javax.servlet.http.HttpServletRequest
methodgetRemoteUser()
.Portlet: This must be the value returned by the
javax.portlet.http.PortletRequest
methodgetRemoteUser()
.
abstract public Object
getRequest()
返回当前请求的特定于环境的对象实例。
Servlet:这必须是当前请求的 javax.servlet.http.HttpServletRequest
实例。
Portlet:这必须是当前请求的 javax.portlet.PortletRequest
实例 ActionRequest
或 RenderRequest
,具体取决于调用此方法的时间。
getRequest
public abstract Object getRequest()
Return the environment-specific object instance for the current request.
Servlet: This must be the current request's
javax.servlet.http.HttpServletRequest
instance.Portlet: This must be the current request's
javax.portlet.PortletRequest
instance, which will be either anActionRequest
or aRenderRequest
depending upon when this method is called.
public void
setRequest(Object request)
设置后续调用 #getRequest
所返回的特定于环境的请求。此方法可以用来安装用于请求的包装器。
默认实现抛出 UnsupportedOperationException
,提供它只有一个目的,即不破坏扩展此类的现有应用程序。
since | 1.2 |
setRequest
public void setRequest(Object request)
Set the environment-specific request to be returned by subsequent calls to
getRequest()
. This may be used to install a wrapper for the request.The default implementation throws
UnsupportedOperationException
and is provided for the sole purpose of not breaking existing applications that extend this class.- Since:
- 1.2
public void
setRequestCharacterEncoding(String encoding) throws java.io.UnsupportedEncodingException
重写在此请求的正文中使用的字符编码的名称。
访问请求之后调用此方法无效,除非已经从请求中获得了 Reader
或 Stream
,这种情况下抛出 IllegalStateException
。
Servlet:此方法必须接通 javax.servlet.ServletRequest
方法 setCharacterEncoding()
。
Portlet: 此方法必须接通 javax.portlet.ActionRequest
方法 setCharacterEncoding()
。
默认实现抛出 UnsupportedOperationException
,提供它只有一个目的,即不破坏扩展此类的现有应用程序。
Throws | java.io.UnsupportedEncodingException: 如果这不是有效的编码 |
since | 1.2 |
setRequestCharacterEncoding
public void setRequestCharacterEncoding(String encoding) throws UnsupportedEncodingException
Overrides the name of the character encoding used in the body of this request.
Calling this method after the request has been accessed will have no no effect, unless a
Reader
orStream
has been obtained from the request, in which case anIllegalStateException
is thrown.Servlet: This must call through to the
javax.servlet.ServletRequest
methodsetCharacterEncoding()
.Portlet: This must call through to the
javax.portlet.ActionRequest
methodsetCharacterEncoding()
.The default implementation throws
UnsupportedOperationException
and is provided for the sole purpose of not breaking existing applications that extend this class.- Throws:
UnsupportedEncodingException
- if this is not a valid encoding- Since:
- 1.2
abstract public String
getRequestContextPath()
返回标识此请求的 Web 应用程序上下文的请求 URI 的一部分。
Servlet:这必须是 javax.servlet.http.HttpServletRequest
方法 getContextPath()
返回的值。
Portlet:这必须是 javax.portlet.PortletRequest
方法 getContextPath()
返回的值。
getRequestContextPath
public abstract String getRequestContextPath()
Return the portion of the request URI that identifies the web application context for this request.
Servlet: This must be the value returned by the
javax.servlet.http.HttpServletRequest
methodgetContextPath()
.Portlet: This must be the value returned by the
javax.portlet.PortletRequest
methodgetContextPath()
.
abstract public java.util.Map<K, V>
getRequestCookieMap()
返回一个不可变的 Map
,其键是包含于当前请求的 cookie 名称集,其值(类型为 javax.servlet.http.Cookie
)是第一个(或唯一一个)对应于底层请求所返回的每个 cookie 名称的 cookie。返回的 Map
必须实现不可修改映射的整个协定,这在 java.util.Map
的 JavaDoc 中有详细说明。
Servlet:这必须是 javax.servlet.http.HttpServletRequest
方法 getCookies()
返回的值,除非返回 null
,这种情况下必须是长度为 0 的数组。
Portlet:这必须是空 Map。
getRequestCookieMap
public abstract Map<String,Object> getRequestCookieMap()
Return an immutable
Map
whose keys are the set of cookie names included in the current request, and whose values (of typejavax.servlet.http.Cookie
) are the first (or only) cookie for each cookie name returned by the underlying request. The returnedMap
must implement the entire contract for an unmodifiable map as described in the JavaDocs forjava.util.Map
.Servlet: This must be the value returned by the
javax.servlet.http.HttpServletRequest
methodgetCookies()
, unlessnull
was returned, in which case this must be a zero-length array.Portlet: Ths must be an empty Map.
abstract public java.util.Map<K, V>
getRequestHeaderMap()
返回一个不可变的 Map
,其键是包含于当前请求的请求头名称集,其值(类型为 String)是第一个(或唯一一个)对应于底层请求所返回的每个头名称的值。返回的 Map
必须实现不可修改映射的整个协定,这在 java.util.Map
的 JavaDoc 中有详细说明。此外,必须以大小写无关的方式执行键比较。
Servlet:这必须是通过 javax.servlet.http.HttpServletRequest
方法 getHeader()
和 getHeaderNames()
获得的头集合。
Portlet:这必须是通过 javax.portlet.PortletRequest
方法 getProperty()
和 getPropertyNames()
获得的属性集。因此,将仅包含 HTTP 头(如果 portlet 容器提供了头)和 portlet 容器提供的其他属性。
getRequestHeaderMap
public abstract Map<String,String> getRequestHeaderMap()
Return an immutable
Map
whose keys are the set of request header names included in the current request, and whose values (of type String) are the first (or only) value for each header name returned by the underlying request. The returnedMap
must implement the entire contract for an unmodifiable map as described in the JavaDocs forjava.util.Map
. In addition, key comparisons must be performed in a case insensitive manner.Servlet: This must be the set of headers available via the
javax.servlet.http.HttpServletRequest
methodsgetHeader()
andgetHeaderNames()
.Portlet: This must be the set of properties available via the
javax.portlet.PortletRequest
methodsgetProperty()
andgetPropertyNames()
. As such, HTTP headers will only be included if they were provided by the portlet container, and additional properties provided by the portlet container may also be included.
abstract public java.util.Map<K, V>
getRequestHeaderValuesMap()
返回一个不可变的 Map
,其键是包含于当前请求的请求头名称集,其值(类型为 String[])是对应于底层请求所返回的每个头名称的所有值。返回的 Map
必须实现不可修改映射的整个协定,这在 java.util.Map
的 JavaDoc 中有详细说明。此外,必须以大小写无关的方式执行键比较。
Servlet:这必须是通过 javax.servlet.http.HttpServletRequest
方法 getHeaders()
和 getHeaderNames()
获得的头集合。
Portlet:这必须是通过 javax.portlet.PortletRequest
方法 getProperties()
和 getPropertyNames()
获得的属性集。因此,将仅包含 HTTP 头(如果 portlet 容器提供了头)和 portlet 容器提供的其他属性。
getRequestHeaderValuesMap
public abstract Map<String,String[]> getRequestHeaderValuesMap()
Return an immutable
Map
whose keys are the set of request header names included in the current request, and whose values (of type String[]) are all of the value for each header name returned by the underlying request. The returnedMap
must implement the entire contract for an unmodifiable map as described in the JavaDocs forjava.util.Map
. In addition, key comparisons must be performed in a case insensitive manner.Servlet: This must be the set of headers available via the
javax.servlet.http.HttpServletRequest
methodsgetHeaders()
andgetHeaderNames()
.Portlet: This must be the set of properties available via the
javax.portlet.PortletRequest
methodsgetProperties()
andgetPropertyNames()
. As such, HTTP headers will only be included if they were provided by the portlet container, and additional properties provided by the portlet container may also be included.
abstract public java.util.Locale
getRequestLocale()
返回客户端将用于接收内容的首选 Locale
。
Servlet:这必须是 javax.servlet.ServletRequest
方法 getLocale()
返回的值。
Portlet:这必须是 javax.portlet.PortletRequest
方法 getLocale()
返回的值。
getRequestLocale
public abstract Locale getRequestLocale()
Return the preferred
Locale
in which the client will accept content.Servlet: This must be the value returned by the
javax.servlet.ServletRequest
methodgetLocale()
.Portlet: This must be the value returned by the
javax.portlet.PortletRequest
methodgetLocale()
.
abstract public java.util.Iterator<E>
getRequestLocales()
返回迭代请求中指定首选 Locale
的 Iterator
,以递减顺序对首选项进行排序。
Servlet:这必须是一个迭代 javax.servlet.ServletRequest
方法 getLocales()
所返回值的 Iterator
。
Portlet:这必须是一个迭代 javax.portlet.PortletRequest
方法 getLocales()
所返回值的 Iterator
。
getRequestLocales
public abstract Iterator<Locale> getRequestLocales()
Return an
Iterator
over the preferredLocale
s specified in the request, in decreasing order of preference.Servlet: This must be an
Iterator
over the values returned by thejavax.servlet.ServletRequest
methodgetLocales()
.Portlet: This must be an
Iterator
over the values returned by thejavax.portlet.PortletRequest
methodgetLocales()
.
abstract public java.util.Map<K, V>
getRequestMap()
返回一个可变的 Map
,它代表当前应用程序的请求作用域属性。返回的 Map
必须实现可修改映射的整个协定,这在 java.util.Map
的 JavaDoc 中有详细说明。在 Map
中所进行的修改一定会导致在请求作用域属性集中进行相应更改。特别是 clear()
、remove()
、put()
、putAll()
和 get()
操作必须对底层数据库结构采取相应的操作。
对于任何导致元素从底层数据结构中删除的 Map
方法,必须采取以下与托管 Bean 有关的操作。如果移除的元素是托管 Bean,并且它有一个或多个使用 javax.annotation.PreDestroy
注释的公共无参数 void 返回方法,则从底层数据结构移除该元素前,必须调用所有这些方法。对于非托管 Bean,但恰好含有使用该注释的方法的元素,移除时不得调用这些方法。PreDestroy
注释的方法所抛出的任何异常都必须被捕获并重新抛出。可以记录异常。
Servlet:这必须是通过 javax.servlet.ServletRequest
方法 getAttribute()
、getAttributeNames()
、removeAttribute()
和 setAttribute()
获得的属性集。
Portlet:这必须是通过 javax.portlet.PortletRequest
方法 getAttribute()
、getAttributeNames()
、removeAttribute()
和 setAttribute()
获得的属性集。
getRequestMap
public abstract Map<String,Object> getRequestMap()
Return a mutable
Map
representing the request scope attributes for the current application. The returnedMap
must implement the entire contract for a modifiable map as described in the JavaDocs forjava.util.Map
. Modifications made in theMap
must cause the corresponding changes in the set of request scope attributes. Particularly theclear()
,remove()
,put()
,putAll()
, andget()
operations must take the appropriate action on the underlying data structure.For any of the
Map
methods that cause an element to be removed from the underlying data structure, the following action regarding managed-beans must be taken. If the element to be removed is a managed-bean, and it has one or more public no-argument void return methods annotated withjavax.annotation.PreDestroy
, each such method must be called before the element is removed from the underlying data structure. Elements that are not managed-beans, but do happen to have methods with that annotation must not have those methods called on removal. Any exception thrown by thePreDestroy
annotated methods must by caught and not rethrown. The exception may be logged.Servlet: This must be the set of attributes available via the
javax.servlet.ServletRequest
methodsgetAttribute()
,getAttributeNames()
,removeAttribute()
, andsetAttribute()
.Portlet: This must be the set of attributes available via the
javax.portlet.PortletRequest
methodsgetAttribute()
,getAttributeNames()
,removeAttribute()
, andsetAttribute()
.
abstract public java.util.Map<K, V>
getRequestParameterMap()
返回一个不可变的 Map
,其键是包含于当前请求的请求参数名称集,其值(类型为 String)是第一个(或唯一一个)对应于底层请求所返回的每个参数名称的值。返回的 Map
必须实现不可修改映射的整个协定,这在 java.util.Map
的 JavaDoc 中有详细说明。
Servlet:这必须是通过 javax.servlet.ServletRequest
方法 getParameter()
和 getParameterNames()
获得的参数集。
Portlet:这必须是通过 javax.portlet.PortletRequest
方法 getParameter()
和 getParameterNames()
获得的参数集。
getRequestParameterMap
public abstract Map<String,String> getRequestParameterMap()
Return an immutable
Map
whose keys are the set of request parameters names included in the current request, and whose values (of type String) are the first (or only) value for each parameter name returned by the underlying request. The returnedMap
must implement the entire contract for an unmodifiable map as described in the JavaDocs forjava.util.Map
.Servlet: This must be the set of parameters available via the
javax.servlet.ServletRequest
methodsgetParameter()
andgetParameterNames()
.Portlet: This must be the set of parameters available via the
javax.portlet.PortletRequest
methodsgetParameter()
andgetParameterNames()
.
abstract public java.util.Iterator<E>
getRequestParameterNames()
返回迭代当前请求中所含所有请求参数名称的 Iterator
。
Servlet:这必须是一个迭代 javax.servlet.ServletRequest
方法 getParameterNames()
所返回值的 Iterator
。
Portlet:这必须是一个迭代 javax.portlet.PortletRequest
方法 getParameterNames()
所返回值的 Iterator
。
getRequestParameterNames
public abstract Iterator<String> getRequestParameterNames()
Return an
Iterator
over the names of all request parameters included in the current request.Servlet: This must be an
Iterator
over the values returned by thejavax.servlet.ServletRequest
methodgetParameterNames()
.Portlet: This must be an
Iterator
over the values returned by thejavax.portlet.PortletRequest
methodgetParameterNames()
.
abstract public java.util.Map<K, V>
getRequestParameterValuesMap()
返回一个不可变的 Map
,其键是包含于当前请求的请求参数名称集,其值(类型为 String[])是对应于底层请求所返回的每个参数名称的所有值。返回的 Map
必须实现不可修改映射的整个协定,这在 java.util.Map
的 JavaDoc 中有详细说明。
Servlet:这必须是通过 javax.servlet.ServletRequest
方法 getParameterValues()
和 getParameterNames()
获得的参数集。
Portlet:这必须是通过 javax.portlet.PortletRequest
方法 getParameterValues()
和 getParameterNames()
获得的参数集。
getRequestParameterValuesMap
public abstract Map<String,String[]> getRequestParameterValuesMap()
Return an immutable
Map
whose keys are the set of request parameters names included in the current request, and whose values (of type String[]) are all of the values for each parameter name returned by the underlying request. The returnedMap
must implement the entire contract for an unmodifiable map as described in the JavaDocs forjava.util.Map
.Servlet: This must be the set of parameters available via the
javax.servlet.ServletRequest
methodsgetParameterValues()
andgetParameterNames()
.Portlet: This must be the set of parameters available via the
javax.portlet.PortletRequest
methodsgetParameterValues()
andgetParameterNames()
.
abstract public String
getRequestPathInfo()
返回包含于请求 URI 的额外路径信息(如果有);否则返回 null
。
Servlet:这必须是 javax.servlet.http.HttpServletRequest
方法 getPathInfo()
返回的值。
Portlet:这必须为 null
。
getRequestPathInfo
public abstract String getRequestPathInfo()
Return the extra path information (if any) included in the request URI; otherwise, return
null
.Servlet: This must be the value returned by the
javax.servlet.http.HttpServletRequest
methodgetPathInfo()
.Portlet: This must be
null
.
abstract public String
getRequestServletPath()
返回包含于请求 URI 的 servlet 路径信息(如果有);否则返回 null
。
Servlet:这必须是 javax.servlet.http.HttpServletRequest
方法 getServletPath()
返回的值。
Portlet:这必须为 null
。
getRequestServletPath
public abstract String getRequestServletPath()
Return the servlet path information (if any) included in the request URI; otherwise, return
null
.Servlet: This must be the value returned by the
javax.servlet.http.HttpServletRequest
methodgetServletPath()
.Portlet: This must be
null
.
public String
getRequestCharacterEncoding()
返回当前用来解释此请求的字符编码。
Servlet:此方法必须返回 javax.servlet.ServletRequest
方法 getCharacterEncoding()
返回的值。
Portlet:此方法必须返回 javax.portlet.ActionRequest
方法 getCharacterEncoding()
返回的值。
默认实现抛出 UnsupportedOperationException
,提供它只有一个目的,即不破坏扩展此类的现有应用程序。
since | 1.2 |
getRequestCharacterEncoding
public String getRequestCharacterEncoding()
Return the character encoding currently being used to interpret this request.
Servlet: This must return the value returned by the
javax.servlet.ServletRequest
methodgetCharacterEncoding()
.Portlet: This must return the value returned by the
javax.portlet.ActionRequest
methodgetCharacterEncoding()
.The default implementation throws
UnsupportedOperationException
and is provided for the sole purpose of not breaking existing applications that extend this class.- Since:
- 1.2
public String
getRequestContentType()
返回此请求的 MIME 内容类型。如果不可用,则返回 null
。
Servlet:此方法必须返回 javax.servlet.ServletRequest
方法 getContentType()
返回的值。
Portlet:此方法必须返回 null
。
默认实现抛出 UnsupportedOperationException
,提供它只有一个目的,即不破坏扩展此类的现有应用程序。
since | 1.2 |
getRequestContentType
public String getRequestContentType()
Return the MIME Content-Type for this request. If not available, return
null
.Servlet: This must return the value returned by the
javax.servlet.ServletRequest
methodgetContentType()
.Portlet: This must return
null
.The default implementation throws
UnsupportedOperationException
and is provided for the sole purpose of not breaking existing applications that extend this class.- Since:
- 1.2
public String
getResponseCharacterEncoding()
返回用于此响应中发送的正文的字符编码(MIME 字符集)名称。
Servlet:此方法必须返回 javax.servlet.ServletResponse
方法 getCharacterEncoding()
返回的值。
Portlet:此方法必须返回 null
。
默认实现抛出 UnsupportedOperationException
,提供它只有一个目的,即不破坏扩展此类的现有应用程序。
since | 1.2 |
getResponseCharacterEncoding
public String getResponseCharacterEncoding()
Returns the name of the character encoding (MIME charset) used for the body sent in this response.
Servlet: This must return the value returned by the
javax.servlet.ServletResponse
methodgetCharacterEncoding()
.Portlet: This must return
null
.The default implementation throws
UnsupportedOperationException
and is provided for the sole purpose of not breaking existing applications that extend this class.- Since:
- 1.2
public String
getResponseContentType()
返回此响应的 MIME 内容类型。如果不可用,则返回 null
。
Servlet:此方法必须返回 javax.servlet.ServletResponse
方法 getContentType()
返回的值。
Portlet:此方法必须返回 null
。
默认实现抛出 UnsupportedOperationException
,提供它只有一个目的,即不破坏扩展此类的现有应用程序。
since | 1.2 |
getResponseContentType
public String getResponseContentType()
Return the MIME Content-Type for this response. If not available, return
null
.Servlet: This must return the value returned by the
javax.servlet.ServletResponse
methodgetContentType()
.Portlet: This must return
null
.The default implementation throws
UnsupportedOperationException
and is provided for the sole purpose of not breaking existing applications that extend this class.- Since:
- 1.2
abstract public java.net.URL
getResource(String path) throws java.net.MalformedURLException
返回映射到指定路径的应用程序资源的 URL
(如果存在);否则返回 null
。
Servlet:这必须是 javax.servlet.ServletContext
方法 getResource(path)
返回的值。
Portlet:这必须是 javax.portlet.PortletContext
方法 getResource(path)
返回的值。
path | 指向请求资源的路径,必须以斜杠 ("/") 字符开始 |
Throws | java.net.MalformedURLException: 如果指定路径的格式不正确 |
Throws | NullPointerException:
如果 path 为 null |
getResource
public abstract URL getResource(String path) throws MalformedURLException
Return a
URL
for the application resource mapped to the specified path, if it exists; otherwise, returnnull
.Servlet: This must be the value returned by the
javax.servlet.ServletContext
methodgetResource(path)
.Portlet: This must be the value returned by the
javax.portlet.PortletContext
methodgetResource(path)
.- Parameters:
path
- The path to the requested resource, which must start with a slash ("/" character- Throws:
MalformedURLException
- if the specified path is not in the correct formNullPointerException
- ifpath
isnull
abstract public java.io.InputStream
getResourceAsStream(String path)
返回映射到指定路径的应用程序资源的 InputStream
(如果存在);否则返回 null
。
Servlet:这必须是 javax.servlet.ServletContext
方法 getResourceAsStream(path)
返回的值。
Portlet:这必须是 javax.portlet.PortletContext
方法 getResourceAsStream(path)
返回的值。
path | 指向请求资源的路径,必须以斜杠 ("/") 字符开始 |
Throws | NullPointerException:
如果 path 为 null |
getResourceAsStream
public abstract InputStream getResourceAsStream(String path)
Return an
InputStream
for an application resource mapped to the specified path, if it exists; otherwise, returnnull
.Servlet: This must be the value returned by the
javax.servlet.ServletContext
methodgetResourceAsStream(path)
.Portlet: This must be the value returned by the
javax.portlet.PortletContext
methodgetResourceAsStream(path)
.- Parameters:
path
- The path to the requested resource, which must start with a slash ("/" character- Throws:
NullPointerException
- ifpath
isnull
abstract public java.util.Set<E>
getResourcePaths(String path)
返回资源路径以指定参数开头的所有应用程序资源的资源路径所组成的 Set
。
Servlet:这必须是 javax.servlet.ServletContext
方法 getResourcePaths(path)
返回的值。
Portlet:这必须是 javax.portlet.PortletContext
方法 getResourcePaths(path)
返回的值。
path | 用于匹配资源的部分路径,必须以斜杠 ("/") 字符开头 |
Throws | NullPointerException:
如果 path 为 null |
getResourcePaths
public abstract Set<String> getResourcePaths(String path)
Return the
Set
of resource paths for all application resources whose resource path starts with the specified argument.Servlet: This must be the value returned by the
javax.servlet.ServletContext
methodgetResourcePaths(path).
Portlet: This must be the value returned by the
javax.portlet.PortletContext
methodgetResourcePaths(path).
- Parameters:
path
- Partial path used to match resources, which must start with a slash ("/") character- Throws:
NullPointerException
- ifpath
isnull
abstract public Object
getResponse()
返回当前响应的特定于环境的对象实例。
Servlet:这是当前请求的 javax.servlet.http.HttpServletResponse
实例。
Portlet:这是当前请求的 javax.portlet.PortletResponse
实例 ActionResponse
或 RenderResponse
,具体取决于调用此方法的时间。
getResponse
public abstract Object getResponse()
Return the environment-specific object instance for the current response.
Servlet: This is the current request's
javax.servlet.http.HttpServletResponse
instance.Portlet: This is the current request's
javax.portlet.PortletResponse
instance, which will be either anActionResponse
or aRenderResponse
depending upon when this method is called.
public void
setResponse(Object response)
设置后续调用 #getResponse
所返回的特定于环境的响应。此方法可以用于安装响应的包装器。
默认实现抛出 UnsupportedOperationException
,提供它只有一个目的,即不破坏扩展此类的现有应用程序。
since | 1.2 |
setResponse
public void setResponse(Object response)
Set the environment-specific response to be returned by subsequent calls to
getResponse()
. This may be used to install a wrapper for the response.The default implementation throws
UnsupportedOperationException
and is provided for the sole purpose of not breaking existing applications that extend this class.- Since:
- 1.2
public void
setResponseCharacterEncoding(String encoding)
设置将发送到客户端的响应的字符编码(MIME 字符集),例如,设置为 UTF-8。
Servlet:此方法必须接通 javax.servlet.ServletResponse
方法 setCharacterEncoding()
。
Portlet:此方法不得执行任何操作。
默认实现抛出 UnsupportedOperationException
,提供它只有一个目的,即不破坏扩展此类的现有应用程序。
since | 1.2 |
setResponseCharacterEncoding
public void setResponseCharacterEncoding(String encoding)
Sets the character encoding (MIME charset) of the response being sent to the client, for example, to UTF-8.
Servlet: This must call through to the
javax.servlet.ServletResponse
methodsetCharacterEncoding()
.Portlet: This method must take no action.
The default implementation throws
UnsupportedOperationException
and is provided for the sole purpose of not breaking existing applications that extend this class.- Since:
- 1.2
abstract public Object
getSession(boolean create)
如果 create
参数为 true
,则创建(如有必要)并返回一个与当前请求关联的会话实例。如果 create
参数为 false
,则返回与当前请求关联的任何现有会话实例;如果没有这样的会话,则返回 null
。
Servlet:此方法必须返回对底层 javax.servlet.http.HttpServletRequest
实例调用 getSession(create)
的结果。
Portlet:此方法必须返回对底层 javax.portlet.PortletRequest
实例调用 getPortletSession(create)
的结果。
create | 指出没有会话与当前请求关联时是否应该创建一个新会话的标志。 |
getSession
public abstract Object getSession(boolean create)
If the
create
parameter istrue
, create (if necessary) and return a session instance associated with the current request. If thecreate
parameter isfalse
return any existing session instance associated with the current request, or returnnull
if there is no such session.Servlet: This must return the result of calling
getSession(create)
on the underlyingjavax.servlet.http.HttpServletRequest
instance.em>Portlet: This must return the result of calling
getPortletSession(create)
on the underlyingjavax.portlet.PortletRequest
instance.- Parameters:
create
- Flag indicating whether or not a new session should be created if there is no session associated with the current request
abstract public java.util.Map<K, V>
getSessionMap()
返回一个可变的 Map
,它代表当前应用程序的会话作用域属性。返回的 Map
必须实现可修改映射的整个协定,这在 java.util.Map
的 JavaDoc 中有详细说明。在 Map
中所进行的修改一定会导致在会话作用域属性集中进行相应更改。特别是 clear()
、remove()
、put()
和 get()
操作必须对底层数据库结构采取相应的操作。通过此 Map
访问属性必定导致创建与当前请求关联的会话(如果不存在这样的会话)。
对于任何导致元素从底层数据结构中删除的 Map
方法,必须采取以下与托管 Bean 有关的操作。如果移除的元素是托管 Bean,并且它有一个或多个使用 javax.annotation.PreDestroy
注释的公共无参数 void 返回方法,则从底层数据结构移除该元素前,必须调用所有这些方法。对于非托管 Bean,但恰好含有使用该注释的方法的元素,移除时不得调用这些方法。PreDestroy
注释的方法所抛出的任何异常都必须被捕获并重新抛出。可以记录异常。
Servlet:这必须是通过 javax.servlet.http.HttpServletSession
方法 getAttribute()
、getAttributeNames()
、removeAttribute()
和 setAttribute()
获得的属性集。
Portlet:这必须是通过 javax.portlet.PortletSession
方法 getAttribute()
、getAttributeNames()
、removeAttribute()
和 setAttribute()
获得的属性集。所有会话属性访问必须出现在会话的 PORTLET_SCOPE 作用域。
getSessionMap
public abstract Map<String,Object> getSessionMap()
Return a mutable
Map
representing the session scope attributes for the current application. The returnedMap
must implement the entire contract for a modifiable map as described in the JavaDocs forjava.util.Map
. Modifications made in theMap
must cause the corresponding changes in the set of session scope attributes. Particularly theclear()
,remove()
,put()
, andget()
operations must take the appropriate action on the underlying data structure. Accessing attributes via thisMap
must cause the creation of a session associated with the current request, if such a session does not already exist.For any of the
Map
methods that cause an element to be removed from the underlying data structure, the following action regarding managed-beans must be taken. If the element to be removed is a managed-bean, and it has one or more public no-argument void return methods annotated withjavax.annotation.PreDestroy
, each such method must be called before the element is removed from the underlying data structure. Elements that are not managed-beans, but do happen to have methods with that annotation must not have those methods called on removal. Any exception thrown by thePreDestroy
annotated methods must by caught and not rethrown. The exception may be logged.Servlet: This must be the set of attributes available via the
javax.servlet.http.HttpServletSession
methodsgetAttribute()
,getAttributeNames()
,removeAttribute()
, andsetAttribute()
.Portlet: This must be the set of attributes available via the
javax.portlet.PortletSession
methodsgetAttribute()
,getAttributeNames()
,removeAttribute()
, andsetAttribute()
. All session attribute access must occur in PORTLET_SCOPE scope within the session.
abstract public java.security.Principal
getUserPrincipal()
返回包含当前验证的用户名称的 Principal
对象(如果有);否则返回 null
。
Servlet:这必须是 javax.servlet.http.HttpServletRequest
方法 getUserPrincipal()
返回的值。
Portlet:这必须是 javax.portlet.http.PortletRequest
方法 getUserPrincipal()
返回的值。
getUserPrincipal
public abstract Principal getUserPrincipal()
Return the
Principal
object containing the name of the current authenticated user, if any; otherwise, returnnull
.Servlet: This must be the value returned by the
javax.servlet.http.HttpServletRequest
methodgetUserPrincipal()
.Portlet: This must be the value returned by the
javax.portlet.http.PortletRequest
methodgetUserPrincipal()
.
abstract public boolean
isUserInRole(String role)
如果当前验证的用户包含在指定的角色中,则返回 true
。否则返回 false
。
Servlet:这必须是 javax.servlet.http.HttpServletRequest
方法 isUserInRole(role)
返回的值。
Portlet:这必须是 javax.portlet.http.PortletRequest
方法 isUserInRole(role)
返回的值。
role | 要检查的逻辑角色名称 |
Throws | NullPointerException:
如果 role 为 null |
isUserInRole
public abstract boolean isUserInRole(String role)
Return
true
if the currently authenticated user is included in the specified role. Otherwise, returnfalse
.Servlet: This must be the value returned by the
javax.servlet.http.HttpServletRequest
methodisUserInRole(role)
.Portlet: This must be the value returned by the
javax.portlet.http.PortletRequest
methodisUserInRole(role)
.- Parameters:
role
- Logical role name to be checked- Throws:
NullPointerException
- ifrole
isnull
abstract public void
log(String message)
将指定的消息记录到应用程序对象。
Servlet:此方法必须通过调用 javax.servlet.ServletContext
方法 log(String)
来执行。
Portlet:此方法必须通过调用 javax.portlet.PortletContext
方法 log(String)
来执行。
message | 要记录的消息 |
Throws | NullPointerException:
如果 message 为 null |
log
public abstract void log(String message)
Log the specified message to the application object.
Servlet: This must be performed by calling the
javax.servlet.ServletContext
methodlog(String)
.Portlet: This must be performed by calling the
javax.portlet.PortletContext
methodlog(String)
.- Parameters:
message
- Message to be logged- Throws:
NullPointerException
- ifmessage
isnull
abstract public void
log(String message, Throwable exception)
将指定的消息和异常记录到应用程序对象。
Servlet:此方法必须通过调用 javax.servlet.ServletContext
方法 log(String,Throwable)
来执行。
Portlet:此方法必须通过调用 javax.portlet.PortletContext
方法 log(String,Throwable)
来执行。
message | 要记录的消息 |
exception | 要记录的异常 |
Throws | NullPointerException:
如果 message 或 exception 为 null |
log
public abstract void log(String message, Throwable exception)
Log the specified message and exception to the application object.
Servlet: This must be performed by calling the
javax.servlet.ServletContext
methodlog(String,Throwable)
.Portlet: This must be performed by calling the
javax.portlet.PortletContext
methodlog(String,Throwable)
.- Parameters:
message
- Message to be loggedexception
- Exception to be logged- Throws:
NullPointerException
- ifmessage
orexception
isnull
abstract public void
redirect(String url) throws java.io.IOException
将请求重定向到指定的 URL,并导致对当前请求的 FacesContext
实例调用 responseComplete()
方法。
Servlet:此方法必须通过调用 javax.servlet.http.HttpServletResponse
方法 sendRedirect()
来完成。
Portlet:此方法必须通过调用 javax.portlet.ActionResponse
方法 sendRedirect()
来完成。
url | 客户端应该重定向到的绝对 URL |
Throws | IllegalArgumentException: 如果指定的 url 是相对的 |
Throws | IllegalStateException:
如果当前对象是 RenderResponse ,而不是 ActionResponse (在 portlet 环境中) |
Throws | IllegalStateException: 如果当前响应已被提交(在 servlet 环境中) |
Throws | java.io.IOException: 如果发生输入/输出错误 |
redirect
public abstract void redirect(String url) throws IOException
Redirect a request to the specified URL, and cause the
responseComplete()
method to be called on theFacesContext
instance for the current request.Servlet: This must be accomplished by calling the
javax.servlet.http.HttpServletResponse
methodsendRedirect()
.Portlet: This must be accomplished by calling the
javax.portlet.ActionResponse
methodsendRedirect()
.- Parameters:
url
- Absolute URL to which the client should be redirected- Throws:
IllegalArgumentException
- if the specified url is relativeIllegalStateException
- if, in a portlet environment, the current response object is aRenderResponse
instead of anActionResponse
IllegalStateException
- if, in a servlet environment, the current response has already been committedIOException
- if an input/output error occurs
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