Interface HttpSession Method


Package javax.servlet.http

public interface HttpSession

The servlet container uses this interface to create a session between an HTTP client and an HTTP server. The session persists for a specified time period, across more than one connection or page request from the user.
A session usually corresponds to one user, who may visit a site many times. The server can maintain a session in many ways such as using cookies or rewriting URLs.





Interface HttpSession Method Detail

getAttribute


public java.lang.Object getAttribute(java.lang.String name)

Returns the object bound with the specified name in this session, or null if no object is bound under the name.

Parameters

Name - a string specifying the name of the object

Returns

The object with the specified name

Throws

java.lang.IllegalStateException - if this method is called on an invalidated session

getAttributeNames


public java.util.Enumeration getAttributeNames()

Returns an Enumeration of String objects containing the names of all the objects bound to this session.

Returns

An Enumeration of String objects specifying the names of all the objects bound to this session

Throws

java.lang.IllegalStateException - if this method is called on an invalidated session

getCreationTime


public long getCreationTime()

Returns the time when this session was created, measured in milliseconds since midnight January 1, 1970 GMT.

Returns

A long specifying when this session was created, expressed in milliseconds since 1/1/1970 GMT

Throws

java.lang.IllegalStateException - if this method is called on an invalidated session

getId


public java.lang.String getId()

Returns a string containing the unique identifier assigned to this session. The identifier is assigned by the servlet container and is implementation dependent.

Returns

A string specifying the identifier assigned to this session

Throws

java.lang.IllegalStateException - if this method is called on an invalidated session

getLastAccessedTime


public long getLastAccessedTime()

Returns the last time the client sent a request associated with this session, as the number of milliseconds since midnight January 1, 1970 GMT, and marked by the time the container received the request.

Actions that your application takes, such as getting or setting a value associated with the session, do not affect the access time.

Returns

A long representing the last time the client sent a request associated with this session, expressed in milliseconds since 1/1/1970 GMT

Throws

java.lang.IllegalStateException - if this method is called on an invalidated session



getMaxInactiveInterval


public int getMaxInactiveInterval()

Returns the maximum time interval, in seconds, that the servlet container will keep this session open between client accesses. After this interval, the servlet container will invalidate the session.
The maximum time interval can be set with the setMaxInactiveInterval method. A negative time indicates the session should never timeout.

Returns

An integer specifying the number of seconds this session remains open between client requests

getServletContext


public ServletContext getServletContext()

Returns the ServletContext to which this session belongs.

Returns

The ServletContext object for the web application

getSessionContext


public HttpSessionContext getSessionContext()
Deprecated.

As of Version 2.1, this method is deprecated and has no replacement. It will be removed in a future version of the Java Servlet API.

getValue


public java.lang.Object getValue(java.lang.String name)

Deprecated. As of Version 2.2, this method is replaced by getAttribute(java.lang.String).

Parameters

Name - a string specifying the name of the object

Returns

The object with the specified name

Throws

java.lang.IllegalStateException - if this method is called on an invalidated session

getValueNames


public java.lang.String[] getValueNames()

Deprecated. As of Version 2.2, this method is replaced by getAttributeNames()

Returns

An array of String objects specifying the names of all the objects bound to this session

Throws

java.lang.IllegalStateException - if this method is called on an invalidated session

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