public Object getAttribute(String name)
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.*.

 public Enumeration getAttributeNames()
Returns an Enumeration containing the 
attribute names available
within this servlet context. Use the
#getAttribute  method with an attribute name
to get the value of an attribute.

 public ServletContext getContext(String uripath)
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.

 public String getContextPath()

 public 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.

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.

 public 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.

 public int getMajorVersion()
Returns the major version of the Java Servlet API that this
servlet container supports. All implementations that comply
with Version 2.4 must have this method
return the integer 2.

 public String getMimeType(String file)
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 are "text/html" and "image/gif".

 public int getMinorVersion()
Returns the minor version of the Servlet API that this
servlet container supports. All implementations that comply
with Version 2.5 must have this method
return the integer 5.

 public RequestDispatcher getNamedDispatcher(String name)
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.

 public String getRealPath(String path)
Returns a String containing the real path 
for a given virtual path. For example, the path "/index.html"
returns the absolute file path on the server's filesystem would be
served by a request for "http://host/contextPath/index.html",
where contextPath is 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. This method returns null
if the servlet container cannot translate the virtual path
to a real path for any reason (such as when the content is
being made available from a .war archive).

 public RequestDispatcher getRequestDispatcher(String path)
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.

 public URL getResource(String path) throws MalformedURLException
Returns a URL to the resource that is mapped to a specified
path. The path must begin with a "/" and is interpreted
as relative to the current context root.

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.

 public InputStream getResourceAsStream(String path)
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.

 public 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. Paths indicating subdirectory paths end with a '/'. The returned paths are all 
relative to the root of the web application 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,



getResourcePaths("/") returns {"/welcome.html", "/catalog/", "/customer/", "/WEB-INF/"}

getResourcePaths("/catalog/") returns {"/catalog/index.html", "/catalog/products.html", "/catalog/offers/"}.

 public String getServerInfo()
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).

 public Servlet getServlet(String name) throws ServletExceptionDeprecated! As -  of Java Servlet API 2.1, with no direct replacement.

This method was originally defined to retrieve a servlet
from a ServletContext. In this version, this method 
always returns null and remains only to preserve 
binary compatibility. This method will be permanently removed 
in a future version of the Java Servlet API.

In lieu of this method, servlets can share information using the 
ServletContext class and can perform shared business logic
by invoking methods on common non-servlet classes.

 public 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.

 public Enumeration getServletNames()Deprecated! As -  of Java Servlet API 2.1, with no replacement.

This method was originally defined to return an 
Enumeration
of all the servlet names known to this context. In this version,
this method always returns an empty Enumeration and 
remains only to preserve binary compatibility. This method will 
be permanently removed in a future version of the Java Servlet API.

 public Enumeration getServlets()Deprecated! As -  of Java Servlet API 2.0, with no replacement.

This method was originally defined to return an Enumeration
of all the servlets known to this servlet context. In this
version, this method always returns an empty enumeration and
remains only to preserve binary compatibility. This method
will be permanently removed in a future version of the Java
Servlet API.

 public  void log(String msg)
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.

 public  void log(Exception exception,
    String msg)Deprecated! As -  of Java Servlet API 2.1, use
			#log(String message, Throwable throwable)  
		instead.

This method was originally defined to write an 
exception's stack trace and an explanatory error message
to the servlet log file.

 public  void log(String message,
    Throwable throwable)
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.

 public  void removeAttribute(String name)
Removes the attribute with the given name from 
the servlet context. After removal, subsequent calls to
#getAttribute  to retrieve the attribute's value
will return null.
If listeners are configured on the ServletContext the 
container notifies them accordingly.

 public  void setAttribute(String name,
    Object object)
Binds an object to a given attribute name in this servlet context. 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.*.