org.eclipse.jetty.server.handler
类 ContextHandler.Context

java.lang.Object
  org.eclipse.jetty.server.handler.ContextHandler.Context

所有已实现的接口：

ServletContext

直接已知子类：

ServletContextHandler.Context

包容类：

ContextHandler

public class ContextHandler.Context
extends Object
implements ServletContext

Context.

A partial implementation of ServletContext. A complete implementation is provided by the derived ContextHandler.

字段摘要

protected boolean	_enabled
protected int	_majorVersion
protected int	_minorVersion

从接口 javax.servlet.ServletContext 继承的字段

ORDERED_LIBS, TEMPDIR

构造方法摘要

protected

ContextHandler.Context()

方法摘要

FilterRegistration.Dynamic	addFilter(String filterName, Class<? extends Filter> filterClass) Adds the filter with the given name and class type to this servlet context.
FilterRegistration.Dynamic	addFilter(String filterName, Filter filter) Registers the given filter instance with this ServletContext under the given filterName.
FilterRegistration.Dynamic	addFilter(String filterName, String className) Adds the filter with the given name and class name to this servlet context.
void	addListener(Class<? extends EventListener> listenerClass) Adds a listener of the given class type to this ServletContext.
void	addListener(String className) Adds the listener with the given class name to this ServletContext.
<T extends EventListener> void	addListener(T t) Adds the given listener to this ServletContext.
ServletRegistration.Dynamic	addServlet(String servletName, Class<? extends Servlet> servletClass) Adds the servlet with the given name and class type to this servlet context.
ServletRegistration.Dynamic	addServlet(String servletName, Servlet servlet) Registers the given servlet instance with this ServletContext under the given servletName.
ServletRegistration.Dynamic	addServlet(String servletName, String className) Adds the servlet with the given name and class name to this servlet context.
<T extends Filter> T	createFilter(Class<T> c) Instantiates the given Filter class.
<T extends EventListener> T	createListener(Class<T> clazz) Instantiates the given EventListener class.
<T extends Servlet> T	createServlet(Class<T> c) Instantiates the given Servlet class.
void	declareRoles(String... roleNames) Declares role names that are tested using isUserInRole.
Object	getAttribute(String name) Returns the servlet container attribute with the given name, or null if there is no attribute by that name.
Enumeration	getAttributeNames() Returns an Enumeration containing the attribute names available within this ServletContext.
ClassLoader	getClassLoader() Gets the class loader of the web application represented by this ServletContext.
ServletContext	getContext(String uripath) Returns a ServletContext object that corresponds to a specified URL on the server.
ContextHandler	getContextHandler()
String	getContextPath() Returns the context path of the web application.
Set<SessionTrackingMode>	getDefaultSessionTrackingModes() Gets the session tracking modes that are supported by default for this ServletContext.
int	getEffectiveMajorVersion() Gets the major version of the Servlet specification that the application represented by this ServletContext is based on.
int	getEffectiveMinorVersion() Gets the minor version of the Servlet specification that the application represented by this ServletContext is based on.
Set<SessionTrackingMode>	getEffectiveSessionTrackingModes() Gets the session tracking modes that are in effect for this ServletContext.
FilterRegistration	getFilterRegistration(String filterName) Gets the FilterRegistration corresponding to the filter with the given filterName.
Map<String,? extends FilterRegistration>	getFilterRegistrations() Gets a (possibly empty) Map of the FilterRegistration objects (keyed by filter name) corresponding to all filters registered with this ServletContext.
String	getInitParameter(String name) Returns a String containing the value of the named context-wide initialization parameter, or null if the parameter does not exist.
Enumeration	getInitParameterNames() Returns the names of the context's initialization parameters as an Enumeration of String objects, or an empty Enumeration if the context has no initialization parameters.
JspConfigDescriptor	getJspConfigDescriptor() Gets the <jsp-config> related configuration that was aggregated from the web.xml and web-fragment.xml descriptor files of the web application represented by this ServletContext.
int	getMajorVersion() Returns the major version of the Servlet API that this servlet container supports.
String	getMimeType(String file) Returns the MIME type of the specified file, or null if the MIME type is not known.
int	getMinorVersion() Returns the minor version of the Servlet API that this servlet container supports.
RequestDispatcher	getNamedDispatcher(String name) Returns a RequestDispatcher object that acts as a wrapper for the named servlet.
String	getRealPath(String path) Gets the real path corresponding to the given virtual path.
RequestDispatcher	getRequestDispatcher(String uriInContext) Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path.
URL	getResource(String path) Returns a URL to the resource that is mapped to the given path.
InputStream	getResourceAsStream(String path) Returns the resource located at the named path as an InputStream object.
Set	getResourcePaths(String path) Returns a directory-like listing of all the paths to resources within the web application whose longest sub-path matches the supplied path argument.
String	getServerInfo() Returns the name and version of the servlet container on which the servlet is running.
Servlet	getServlet(String name) 已过时。
String	getServletContextName() Returns the name of this web application corresponding to this ServletContext as specified in the deployment descriptor for this web application by the display-name element.
Enumeration	getServletNames() 已过时。
ServletRegistration	getServletRegistration(String servletName) Gets the ServletRegistration corresponding to the servlet with the given servletName.
Map<String,? extends ServletRegistration>	getServletRegistrations() Gets a (possibly empty) Map of the ServletRegistration objects (keyed by servlet name) corresponding to all servlets registered with this ServletContext.
Enumeration	getServlets() 已过时。
SessionCookieConfig	getSessionCookieConfig() Gets the SessionCookieConfig object through which various properties of the session tracking cookies created on behalf of this ServletContext may be configured.
boolean	isEnabled()
void	log(Exception exception, String msg)
void	log(String msg) Writes the specified message to a servlet log file, usually an event log.
void	log(String message, Throwable throwable) Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file.
void	removeAttribute(String name) Removes the attribute with the given name from this ServletContext.
void	setAttribute(String name, Object value) Binds an object to a given attribute name in this ServletContext.
void	setEffectiveMajorVersion(int v)
void	setEffectiveMinorVersion(int v)
void	setEnabled(boolean enabled)
boolean	setInitParameter(String name, String value) Sets the context initialization parameter with the given name and value on this ServletContext.
void	setJspConfigDescriptor(JspConfigDescriptor d)
void	setSessionTrackingModes(Set<SessionTrackingMode> sessionTrackingModes) Sets the session tracking modes that are to become effective for this ServletContext.
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

_majorVersion

protected int _majorVersion

_minorVersion

protected int _minorVersion

_enabled

protected boolean _enabled

构造方法详细信息

ContextHandler.Context

protected ContextHandler.Context()

方法详细信息

getContextHandler

public ContextHandler getContextHandler()

getContext

public ServletContext getContext(String uripath)

从接口 ServletContext 复制的描述

Returns a ServletContext object that corresponds to a specified URL on the server.

This method allows servlets to gain access to the context for various parts of the server, and as needed obtain RequestDispatcher objects from the context. The given path must be begin with /, is interpreted relative to the server's document root and is matched against the context roots of other web applications hosted on this container.

In a security conscious environment, the servlet container may return null for a given URL.

指定者：

接口 ServletContext 中的 getContext

参数：

uripath - a String specifying the context path of another web application in the container.

返回：

the ServletContext object that corresponds to the named URL, or null if either none exists or the container wishes to restrict this access.

另请参见：

RequestDispatcher

getMajorVersion

public int getMajorVersion()

从接口 ServletContext 复制的描述

Returns the major version of the Servlet API that this servlet container supports. All implementations that comply with Version 3.0 must have this method return the integer 3.

指定者：

接口 ServletContext 中的 getMajorVersion

返回：

3

getMimeType

public String getMimeType(String file)

从接口 ServletContext 复制的描述

Returns the MIME type of the specified file, or null if the MIME type is not known. The MIME type is determined by the configuration of the servlet container, and may be specified in a web application deployment descriptor. Common MIME types include text/html and image/gif.

指定者：

接口 ServletContext 中的 getMimeType

参数：

file - a String specifying the name of a file

返回：

a String specifying the file's MIME type

getMinorVersion

public int getMinorVersion()

从接口 ServletContext 复制的描述

Returns the minor version of the Servlet API that this servlet container supports. All implementations that comply with Version 3.0 must have this method return the integer 0.

指定者：

接口 ServletContext 中的 getMinorVersion

返回：

0

getNamedDispatcher

public RequestDispatcher getNamedDispatcher(String name)

从接口 ServletContext 复制的描述

Returns a RequestDispatcher object that acts as a wrapper for the named servlet.

Servlets (and JSP pages also) may be given names via server administration or via a web application deployment descriptor. A servlet instance can determine its name using ServletConfig.getServletName().

This method returns null if the ServletContext cannot return a RequestDispatcher for any reason.

指定者：

接口 ServletContext 中的 getNamedDispatcher

参数：

name - a String specifying the name of a servlet to wrap

返回：

a RequestDispatcher object that acts as a wrapper for the named servlet, or null if the ServletContext cannot return a RequestDispatcher

另请参见：

RequestDispatcher, ServletContext.getContext(java.lang.String), ServletConfig.getServletName()

getRequestDispatcher

public RequestDispatcher getRequestDispatcher(String uriInContext)

从接口 ServletContext 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 must begin with a / and is interpreted as relative to the current context root. Use getContext to obtain a RequestDispatcher for resources in foreign contexts.

This method returns null if the ServletContext cannot return a RequestDispatcher.

指定者：

接口 ServletContext 中的 getRequestDispatcher

参数：

uriInContext - a String specifying the pathname to the resource

返回：

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

另请参见：

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

getRealPath

public String getRealPath(String path)

从接口 ServletContext 复制的描述

Gets the real path corresponding to the given virtual path.

For example, if path is equal to /index.html, this method will return the absolute file path on the server's filesystem to which a request of the form http://<host>:<port>/<contextPath>/index.html would be mapped, where <contextPath> corresponds to the context path of this ServletContext.

The real path returned will be in a form appropriate to the computer and operating system on which the servlet container is running, including the proper path separators.

Resources inside the /META-INF/resources directories of JAR files bundled in the application's /WEB-INF/lib directory must be considered only if the container has unpacked them from their containing JAR file, in which case the path to the unpacked location must be returned.

This method returns null if the servlet container is unable to translate the given virtual path to a real path.

指定者：

接口 ServletContext 中的 getRealPath

参数：

path - the virtual path to be translated to a real path

返回：

the real path, or null if the translation cannot be performed

getResource

public URL getResource(String path)
                throws MalformedURLException

从接口 ServletContext 复制的描述

Returns a URL to the resource that is mapped to the given path.

The path must begin with a / and is interpreted as relative to the current context root, or relative to the /META-INF/resources directory of a JAR file inside the web application's /WEB-INF/lib directory. This method will first search the document root of the web application for the requested resource, before searching any of the JAR files inside /WEB-INF/lib. The order in which the JAR files inside /WEB-INF/lib are searched is undefined.

This method allows the servlet container to make a resource available to servlets from any source. Resources can be located on a local or remote file system, in a database, or in a .war file.

The servlet container must implement the URL handlers and URLConnection objects that are necessary to access the resource.

This method returns null if no resource is mapped to the pathname.

Some containers may allow writing to the URL returned by this method using the methods of the URL class.

The resource content is returned directly, so be aware that requesting a .jsp page returns the JSP source code. Use a RequestDispatcher instead to include results of an execution.

This method has a different purpose than java.lang.Class.getResource, which looks up resources based on a class loader. This method does not use class loaders.

指定者：

接口 ServletContext 中的 getResource

参数：

path - a String specifying the path to the resource

返回：

the resource located at the named path, or null if there is no resource at that path

抛出：

MalformedURLException - if the pathname is not given in the correct form

getResourceAsStream

public InputStream getResourceAsStream(String path)

从接口 ServletContext 复制的描述

Returns the resource located at the named path as an InputStream object.

The data in the InputStream can be of any type or length. The path must be specified according to the rules given in getResource. This method returns null if no resource exists at the specified path.

Meta-information such as content length and content type that is available via getResource method is lost when using this method.

The servlet container must implement the URL handlers and URLConnection objects necessary to access the resource.

This method is different from java.lang.Class.getResourceAsStream, which uses a class loader. This method allows servlet containers to make a resource available to a servlet from any location, without using a class loader.

指定者：

接口 ServletContext 中的 getResourceAsStream

参数：

path - a String specifying the path to the resource

返回：

the InputStream returned to the servlet, or null if no resource exists at the specified path

getResourcePaths

public Set getResourcePaths(String path)

从接口 ServletContext 复制的描述

Returns a directory-like listing of all the paths to resources within the web application whose longest sub-path matches the supplied path argument.

Paths indicating subdirectory paths end with a /.

The returned paths are all relative to the root of the web application, or relative to the /META-INF/resources directory of a JAR file inside the web application's /WEB-INF/lib directory, and have a leading /.

For example, for a web application containing:

   /welcome.html
   /catalog/index.html
   /catalog/products.html
   /catalog/offers/books.html
   /catalog/offers/music.html
   /customer/login.jsp
   /WEB-INF/web.xml
   /WEB-INF/classes/com.acme.OrderServlet.class
   /WEB-INF/lib/catalog.jar!/META-INF/resources/catalog/moreOffers/books.html
 

getResourcePaths("/") would return {"/welcome.html", "/catalog/", "/customer/", "/WEB-INF/"}, and getResourcePaths("/catalog/") would return {"/catalog/index.html", "/catalog/products.html", "/catalog/offers/", "/catalog/moreOffers/"}.

指定者：

接口 ServletContext 中的 getResourcePaths

参数：

path - the partial path used to match the resources, which must start with a /

返回：

a Set containing the directory listing, or null if there are no resources in the web application whose path begins with the supplied path.

getServerInfo

public String getServerInfo()

从接口 ServletContext 复制的描述

Returns the name and version of the servlet container on which the servlet is running.

The form of the returned string is servername/versionnumber. For example, the JavaServer Web Development Kit may return the string JavaServer Web Dev Kit/1.0.

The servlet container may return other optional information after the primary string in parentheses, for example, JavaServer Web Dev Kit/1.0 (JDK 1.1.6; Windows NT 4.0 x86).

指定者：

接口 ServletContext 中的 getServerInfo

返回：

a String containing at least the servlet container name and version number

getServlet

@Deprecated
public Servlet getServlet(String name)
                   throws ServletException

已过时。

指定者：

接口 ServletContext 中的 getServlet

抛出：

ServletException

getServletNames

@Deprecated
public Enumeration getServletNames()

已过时。

指定者：

接口 ServletContext 中的 getServletNames

getServlets

@Deprecated
public Enumeration getServlets()

已过时。

指定者：

接口 ServletContext 中的 getServlets

log

public void log(Exception exception,
                String msg)

指定者：

接口 ServletContext 中的 log

log

public void log(String msg)

从接口 ServletContext 复制的描述

Writes the specified message to a servlet log file, usually an event log. The name and type of the servlet log file is specific to the servlet container.

指定者：

接口 ServletContext 中的 log

参数：

msg - a String specifying the message to be written to the log file

log

public void log(String message,
                Throwable throwable)

从接口 ServletContext 复制的描述

Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file. The name and type of the servlet log file is specific to the servlet container, usually an event log.

指定者：

接口 ServletContext 中的 log

参数：

message - a String that describes the error or exception

throwable - the Throwable error or exception

getInitParameter

public String getInitParameter(String name)

从接口 ServletContext 复制的描述

Returns a String containing the value of the named context-wide initialization parameter, or null if the parameter does not exist.

This method can make available configuration information useful to an entire web application. For example, it can provide a webmaster's email address or the name of a system that holds critical data.

指定者：

接口 ServletContext 中的 getInitParameter

参数：

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

返回：

a String containing at least the servlet container name and version number

另请参见：

ServletConfig.getInitParameter(java.lang.String)

getInitParameterNames

public Enumeration getInitParameterNames()

从接口 ServletContext 复制的描述

Returns the names of the context's initialization parameters as an Enumeration of String objects, or an empty Enumeration if the context has no initialization parameters.

指定者：

接口 ServletContext 中的 getInitParameterNames

返回：

an Enumeration of String objects containing the names of the context's initialization parameters

另请参见：

ServletConfig.getInitParameter(java.lang.String)

getAttribute

public Object getAttribute(String name)

从接口 ServletContext 复制的描述

Returns the servlet container attribute with the given name, or null if there is no attribute by that name.

An attribute allows a servlet container to give the servlet additional information not already provided by this interface. See your server documentation for information about its attributes. A list of supported attributes can be retrieved using getAttributeNames.

The attribute is returned as a java.lang.Object or some subclass.

Attribute names should follow the same convention as package names. The Java Servlet API specification reserves names matching java.*, javax.*, and sun.*.

指定者：

接口 ServletContext 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 no attribute exists matching the given name

另请参见：

ServletContext.getAttributeNames()

getAttributeNames

public Enumeration getAttributeNames()

从接口 ServletContext 复制的描述

Returns an Enumeration containing the attribute names available within this ServletContext.

Use the ServletContext.getAttribute(java.lang.String) method with an attribute name to get the value of an attribute.

指定者：

接口 ServletContext 中的 getAttributeNames

返回：

an Enumeration of attribute names

另请参见：

ServletContext.getAttribute(java.lang.String)

setAttribute

public void setAttribute(String name,
                         Object value)

从接口 ServletContext 复制的描述

Binds an object to a given attribute name in this ServletContext. If the name specified is already used for an attribute, this method will replace the attribute with the new to the new attribute.

If listeners are configured on the ServletContext the container notifies them accordingly.

If a null value is passed, the effect is the same as calling removeAttribute().

Attribute names should follow the same convention as package names. The Java Servlet API specification reserves names matching java.*, javax.*, and sun.*.

指定者：

接口 ServletContext 中的 setAttribute

参数：

name - a String specifying the name of the attribute

value - an Object representing the attribute to be bound

removeAttribute

public void removeAttribute(String name)

从接口 ServletContext 复制的描述

Removes the attribute with the given name from this ServletContext. After removal, subsequent calls to ServletContext.getAttribute(java.lang.String) to retrieve the attribute's value will return null.

If listeners are configured on the ServletContext the container notifies them accordingly.

指定者：

接口 ServletContext 中的 removeAttribute

参数：

name - a String specifying the name of the attribute to be removed

getServletContextName

public String getServletContextName()

从接口 ServletContext 复制的描述

Returns the name of this web application corresponding to this ServletContext as specified in the deployment descriptor for this web application by the display-name element.

指定者：

接口 ServletContext 中的 getServletContextName

返回：

The name of the web application or null if no name has been declared in the deployment descriptor.

getContextPath

public String getContextPath()

从接口 ServletContext 复制的描述

Returns the context path of the web application.

The context path is the portion of the request URI that is used to select 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 "".

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

指定者：

接口 ServletContext 中的 getContextPath

返回：

The context path of the web application, or "" for the default (root) context

另请参见：

HttpServletRequest.getContextPath()

toString

public String toString()

覆盖：

类 Object 中的 toString

setInitParameter

public boolean setInitParameter(String name,
                                String value)

从接口 ServletContext 复制的描述

Sets the context initialization parameter with the given name and value on this ServletContext.

指定者：

接口 ServletContext 中的 setInitParameter

参数：

name - the name of the context initialization parameter to set

value - the value of the context initialization parameter to set

返回：

true if the context initialization parameter with the given name and value was set successfully on this ServletContext, and false if it was not set because this ServletContext already contains a context initialization parameter with a matching name

addFilter

public FilterRegistration.Dynamic addFilter(String filterName,
                                            Class<? extends Filter> filterClass)

从接口 ServletContext 复制的描述

Adds the filter with the given name and class type to this servlet context.

The registered filter may be further configured via the returned FilterRegistration object.

If this ServletContext already contains a preliminary FilterRegistration for a filter with the given filterName, it will be completed (by assigning the name of the given filterClass to it) and returned.

This method supports resource injection if the given filterClass represents a Managed Bean. See the Java EE platform and JSR 299 specifications for additional details about Managed Beans and resource injection.

指定者：

接口 ServletContext 中的 addFilter

参数：

filterName - the name of the filter

filterClass - the class object from which the filter will be instantiated

返回：

a FilterRegistration object that may be used to further configure the registered filter, or null if this ServletContext already contains a complete FilterRegistration for a filter with the given filterName

addFilter

public FilterRegistration.Dynamic addFilter(String filterName,
                                            Filter filter)

从接口 ServletContext 复制的描述

Registers the given filter instance with this ServletContext under the given filterName.

The registered filter may be further configured via the returned FilterRegistration object.

If this ServletContext already contains a preliminary FilterRegistration for a filter with the given filterName, it will be completed (by assigning the class name of the given filter instance to it) and returned.

指定者：

接口 ServletContext 中的 addFilter

参数：

filterName - the name of the filter

filter - the filter instance to register

返回：

a FilterRegistration object that may be used to further configure the given filter, or null if this ServletContext already contains a complete FilterRegistration for a filter with the given filterName or if the same filter instance has already been registered with this or another ServletContext in the same container

addFilter

public FilterRegistration.Dynamic addFilter(String filterName,
                                            String className)

从接口 ServletContext 复制的描述

Adds the filter with the given name and class name to this servlet context.

The registered filter may be further configured via the returned FilterRegistration object.

The specified className will be loaded using the classloader associated with the application represented by this ServletContext.

If this ServletContext already contains a preliminary FilterRegistration for a filter with the given filterName, it will be completed (by assigning the given className to it) and returned.

This method supports resource injection if the class with the given className represents a Managed Bean. See the Java EE platform and JSR 299 specifications for additional details about Managed Beans and resource injection.

指定者：

接口 ServletContext 中的 addFilter

参数：

filterName - the name of the filter

className - the fully qualified class name of the filter

返回：

a FilterRegistration object that may be used to further configure the registered filter, or null if this ServletContext already contains a complete FilterRegistration for a filter with the given filterName

addServlet

public ServletRegistration.Dynamic addServlet(String servletName,
                                              Class<? extends Servlet> servletClass)

从接口 ServletContext 复制的描述

Adds the servlet with the given name and class type to this servlet context.

The registered servlet may be further configured via the returned ServletRegistration object.

If this ServletContext already contains a preliminary ServletRegistration for a servlet with the given servletName, it will be completed (by assigning the name of the given servletClass to it) and returned.

This method introspects the given servletClass for the ServletSecurity, MultipartConfig, javax.annotation.security.RunAs, and javax.annotation.security.DeclareRoles annotations. In addition, this method supports resource injection if the given servletClass represents a Managed Bean. See the Java EE platform and JSR 299 specifications for additional details about Managed Beans and resource injection.

指定者：

接口 ServletContext 中的 addServlet

参数：

servletName - the name of the servlet

servletClass - the class object from which the servlet will be instantiated

返回：

a ServletRegistration object that may be used to further configure the registered servlet, or null if this ServletContext already contains a complete ServletRegistration for the given servletName

addServlet

public ServletRegistration.Dynamic addServlet(String servletName,
                                              Servlet servlet)

从接口 ServletContext 复制的描述

Registers the given servlet instance with this ServletContext under the given servletName.

The registered servlet may be further configured via the returned ServletRegistration object.

If this ServletContext already contains a preliminary ServletRegistration for a servlet with the given servletName, it will be completed (by assigning the class name of the given servlet instance to it) and returned.

指定者：

接口 ServletContext 中的 addServlet

参数：

servletName - the name of the servlet

servlet - the servlet instance to register

返回：

a ServletRegistration object that may be used to further configure the given servlet, or null if this ServletContext already contains a complete ServletRegistration for a servlet with the given servletName or if the same servlet instance has already been registered with this or another ServletContext in the same container

addServlet

public ServletRegistration.Dynamic addServlet(String servletName,
                                              String className)

从接口 ServletContext 复制的描述

Adds the servlet with the given name and class name to this servlet context.

The registered servlet may be further configured via the returned ServletRegistration object.

The specified className will be loaded using the classloader associated with the application represented by this ServletContext.

If this ServletContext already contains a preliminary ServletRegistration for a servlet with the given servletName, it will be completed (by assigning the given className to it) and returned.

This method introspects the class with the given className for the ServletSecurity, MultipartConfig, javax.annotation.security.RunAs, and javax.annotation.security.DeclareRoles annotations. In addition, this method supports resource injection if the class with the given className represents a Managed Bean. See the Java EE platform and JSR 299 specifications for additional details about Managed Beans and resource injection.

指定者：

接口 ServletContext 中的 addServlet

参数：

servletName - the name of the servlet

className - the fully qualified class name of the servlet

返回：

a ServletRegistration object that may be used to further configure the registered servlet, or null if this ServletContext already contains a complete ServletRegistration for a servlet with the given servletName

createFilter

public <T extends Filter> T createFilter(Class<T> c)
                              throws ServletException

从接口 ServletContext 复制的描述

Instantiates the given Filter class.

The returned Filter instance may be further customized before it is registered with this ServletContext via a call to ServletContext.addFilter(String,Filter).

The given Filter class must define a zero argument constructor, which is used to instantiate it.

This method supports resource injection if the given clazz represents a Managed Bean. See the Java EE platform and JSR 299 specifications for additional details about Managed Beans and resource injection.

指定者：

接口 ServletContext 中的 createFilter

参数：

c - the Filter class to instantiate

返回：

the new Filter instance

抛出：

ServletException - if the given clazz fails to be instantiated

createServlet

public <T extends Servlet> T createServlet(Class<T> c)
                                throws ServletException

从接口 ServletContext 复制的描述

Instantiates the given Servlet class.

The returned Servlet instance may be further customized before it is registered with this ServletContext via a call to ServletContext.addServlet(String,Servlet).

The given Servlet class must define a zero argument constructor, which is used to instantiate it.

This method introspects the given clazz for the following annotations: ServletSecurity, MultipartConfig, javax.annotation.security.RunAs, and javax.annotation.security.DeclareRoles. In addition, this method supports resource injection if the given clazz represents a Managed Bean. See the Java EE platform and JSR 299 specifications for additional details about Managed Beans and resource injection.

指定者：

接口 ServletContext 中的 createServlet

参数：

c - the Servlet class to instantiate

返回：

the new Servlet instance

抛出：

ServletException - if the given clazz fails to be instantiated

getDefaultSessionTrackingModes

public Set<SessionTrackingMode> getDefaultSessionTrackingModes()

从接口 ServletContext 复制的描述

Gets the session tracking modes that are supported by default for this ServletContext.

指定者：

接口 ServletContext 中的 getDefaultSessionTrackingModes

返回：

set of the session tracking modes supported by default for this ServletContext

getEffectiveSessionTrackingModes

public Set<SessionTrackingMode> getEffectiveSessionTrackingModes()

从接口 ServletContext 复制的描述

Gets the session tracking modes that are in effect for this ServletContext.

The session tracking modes in effect are those provided to setSessionTrackingModes.

By default, the session tracking modes returned by getDefaultSessionTrackingModes are in effect.

指定者：

接口 ServletContext 中的 getEffectiveSessionTrackingModes

返回：

set of the session tracking modes in effect for this ServletContext

getFilterRegistration

public FilterRegistration getFilterRegistration(String filterName)

从接口 ServletContext 复制的描述

Gets the FilterRegistration corresponding to the filter with the given filterName.

指定者：

接口 ServletContext 中的 getFilterRegistration

返回：

the (complete or preliminary) FilterRegistration for the filter with the given filterName, or null if no FilterRegistration exists under that name

getFilterRegistrations

public Map<String,? extends FilterRegistration> getFilterRegistrations()

从接口 ServletContext 复制的描述

Gets a (possibly empty) Map of the FilterRegistration objects (keyed by filter name) corresponding to all filters registered with this ServletContext.

The returned Map includes the FilterRegistration objects corresponding to all declared and annotated filters, as well as the FilterRegistration objects corresponding to all filters that have been added via one of the addFilter methods.

Any changes to the returned Map must not affect this ServletContext.

指定者：

接口 ServletContext 中的 getFilterRegistrations

返回：

Map of the (complete and preliminary) FilterRegistration objects corresponding to all filters currently registered with this ServletContext

getServletRegistration

public ServletRegistration getServletRegistration(String servletName)

从接口 ServletContext 复制的描述

Gets the ServletRegistration corresponding to the servlet with the given servletName.

指定者：

接口 ServletContext 中的 getServletRegistration

返回：

the (complete or preliminary) ServletRegistration for the servlet with the given servletName, or null if no ServletRegistration exists under that name

getServletRegistrations

public Map<String,? extends ServletRegistration> getServletRegistrations()

从接口 ServletContext 复制的描述

Gets a (possibly empty) Map of the ServletRegistration objects (keyed by servlet name) corresponding to all servlets registered with this ServletContext.

The returned Map includes the ServletRegistration objects corresponding to all declared and annotated servlets, as well as the ServletRegistration objects corresponding to all servlets that have been added via one of the addServlet methods.

If permitted, any changes to the returned Map must not affect this ServletContext.

指定者：

接口 ServletContext 中的 getServletRegistrations

返回：

Map of the (complete and preliminary) ServletRegistration objects corresponding to all servlets currently registered with this ServletContext

getSessionCookieConfig

public SessionCookieConfig getSessionCookieConfig()

从接口 ServletContext 复制的描述

Gets the SessionCookieConfig object through which various properties of the session tracking cookies created on behalf of this ServletContext may be configured.

Repeated invocations of this method will return the same SessionCookieConfig instance.

指定者：

接口 ServletContext 中的 getSessionCookieConfig

返回：

the SessionCookieConfig object through which various properties of the session tracking cookies created on behalf of this ServletContext may be configured

setSessionTrackingModes

public void setSessionTrackingModes(Set<SessionTrackingMode> sessionTrackingModes)

从接口 ServletContext 复制的描述

Sets the session tracking modes that are to become effective for this ServletContext.

The given sessionTrackingModes replaces any session tracking modes set by a previous invocation of this method on this ServletContext.

指定者：

接口 ServletContext 中的 setSessionTrackingModes

参数：

sessionTrackingModes - the set of session tracking modes to become effective for this ServletContext

addListener

public void addListener(String className)

从接口 ServletContext 复制的描述

Adds the listener with the given class name to this ServletContext.

The class with the given name will be loaded using the classloader associated with the application represented by this ServletContext, and must implement one or more of the following interfaces:

• ServletContextAttributeListener
• ServletRequestListener
• ServletRequestAttributeListener
• HttpSessionListener
• HttpSessionAttributeListener

If this ServletContext was passed to ServletContainerInitializer.onStartup(java.util.Set>, javax.servlet.ServletContext), then the class with the given name may also implement ServletContextListener, in addition to the interfaces listed above.

As part of this method call, the container must load the class with the specified class name to ensure that it implements one of the required interfaces.

If the class with the given name implements a listener interface whose invocation order corresponds to the declaration order (i.e., if it implements ServletRequestListener, ServletContextListener, or HttpSessionListener), then the new listener will be added to the end of the ordered list of listeners of that interface.

This method supports resource injection if the class with the given className represents a Managed Bean. See the Java EE platform and JSR 299 specifications for additional details about Managed Beans and resource injection.

指定者：

接口 ServletContext 中的 addListener

参数：

className - the fully qualified class name of the listener

addListener

public <T extends EventListener> void addListener(T t)

从接口 ServletContext 复制的描述

Adds the given listener to this ServletContext.

The given listener must be an instance of one or more of the following interfaces:

• ServletContextAttributeListener
• ServletRequestListener
• ServletRequestAttributeListener
• HttpSessionListener
• HttpSessionAttributeListener

If this ServletContext was passed to ServletContainerInitializer.onStartup(java.util.Set>, javax.servlet.ServletContext), then the given listener may also be an instance of ServletContextListener, in addition to the interfaces listed above.

If the given listener is an instance of a listener interface whose invocation order corresponds to the declaration order (i.e., if it is an instance of ServletRequestListener, ServletContextListener, or HttpSessionListener), then the listener will be added to the end of the ordered list of listeners of that interface.

指定者：

接口 ServletContext 中的 addListener

参数：

t - the listener to be added

addListener

public void addListener(Class<? extends EventListener> listenerClass)

从接口 ServletContext 复制的描述

Adds a listener of the given class type to this ServletContext.

The given listenerClass must implement one or more of the following interfaces:

• ServletContextAttributeListener
• ServletRequestListener
• ServletRequestAttributeListener
• HttpSessionListener
• HttpSessionAttributeListener

If this ServletContext was passed to ServletContainerInitializer.onStartup(java.util.Set>, javax.servlet.ServletContext), then the given listenerClass may also implement ServletContextListener, in addition to the interfaces listed above.

If the given listenerClass implements a listener interface whose invocation order corresponds to the declaration order (i.e., if it implements ServletRequestListener, ServletContextListener, or HttpSessionListener), then the new listener will be added to the end of the ordered list of listeners of that interface.

This method supports resource injection if the given listenerClass represents a Managed Bean. See the Java EE platform and JSR 299 specifications for additional details about Managed Beans and resource injection.

指定者：

接口 ServletContext 中的 addListener

参数：

listenerClass - the listener class to be instantiated

createListener

public <T extends EventListener> T createListener(Class<T> clazz)
                                       throws ServletException

从接口 ServletContext 复制的描述

Instantiates the given EventListener class.

The specified EventListener class must implement at least one of the ServletContextListener, ServletContextAttributeListener, ServletRequestListener, ServletRequestAttributeListener, HttpSessionListener, or HttpSessionAttributeListener interfaces.

The returned EventListener instance may be further customized before it is registered with this ServletContext via a call to ServletContext.addListener(EventListener).

The given EventListener class must define a zero argument constructor, which is used to instantiate it.

This method supports resource injection if the given clazz represents a Managed Bean. See the Java EE platform and JSR 299 specifications for additional details about Managed Beans and resource injection.

指定者：

接口 ServletContext 中的 createListener

参数：

clazz - the EventListener class to instantiate

返回：

the new EventListener instance

抛出：

ServletException - if the given clazz fails to be instantiated

getClassLoader

public ClassLoader getClassLoader()

从接口 ServletContext 复制的描述

Gets the class loader of the web application represented by this ServletContext.

If a security manager exists, and the caller's class loader is not the same as, or an ancestor of the requested class loader, then the security manager's checkPermission method is called with a RuntimePermission("getClassLoader") permission to check whether access to the requested class loader should be granted.

指定者：

接口 ServletContext 中的 getClassLoader

返回：

the class loader of the web application represented by this ServletContext

getEffectiveMajorVersion

public int getEffectiveMajorVersion()

从接口 ServletContext 复制的描述

Gets the major version of the Servlet specification that the application represented by this ServletContext is based on.

The value returned may be different from ServletContext.getMajorVersion(), which returns the major version of the Servlet specification supported by the Servlet container.

指定者：

接口 ServletContext 中的 getEffectiveMajorVersion

返回：

the major version of the Servlet specification that the application represented by this ServletContext is based on

getEffectiveMinorVersion

public int getEffectiveMinorVersion()

从接口 ServletContext 复制的描述

Gets the minor version of the Servlet specification that the application represented by this ServletContext is based on.

The value returned may be different from ServletContext.getMinorVersion(), which returns the minor version of the Servlet specification supported by the Servlet container.

指定者：

接口 ServletContext 中的 getEffectiveMinorVersion

返回：

the minor version of the Servlet specification that the application xrepresented by this ServletContext is based on

setEffectiveMajorVersion

public void setEffectiveMajorVersion(int v)

setEffectiveMinorVersion

public void setEffectiveMinorVersion(int v)

getJspConfigDescriptor

public JspConfigDescriptor getJspConfigDescriptor()

从接口 ServletContext 复制的描述

Gets the <jsp-config> related configuration that was aggregated from the web.xml and web-fragment.xml descriptor files of the web application represented by this ServletContext.

指定者：

接口 ServletContext 中的 getJspConfigDescriptor

返回：

the <jsp-config> related configuration that was aggregated from the web.xml and web-fragment.xml descriptor files of the web application represented by this ServletContext, or null if no such configuration exists

另请参见：

JspConfigDescriptor

setJspConfigDescriptor

public void setJspConfigDescriptor(JspConfigDescriptor d)

declareRoles

public void declareRoles(String... roleNames)

从接口 ServletContext 复制的描述

Declares role names that are tested using isUserInRole.

Roles that are implicitly declared as a result of their use within the setServletSecurity or setRunAsRole methods of the ServletRegistration interface need not be declared.

指定者：

接口 ServletContext 中的 declareRoles

参数：

roleNames - the role names being declared

setEnabled

public void setEnabled(boolean enabled)

isEnabled

public boolean isEnabled()