HttpSession的认识

package javax.servlet.http;

import java.util.Enumeration;

import javax.servlet.ServletContext;

public interface HttpSession {
    public long getCreationTime();
    public String getId();
    public long getLastAccessedTime();
    public ServletContext getServletContext();
    public void setMaxInactiveInterval(int interval);
    public int getMaxInactiveInterval();
    @Deprecated
    public HttpSessionContext getSessionContext();
    public Object getAttribute(String name);
    @Deprecated
    public Object getValue(String name);
    public Enumeration<String> getAttributeNames();
    @Deprecated
    public String[] getValueNames();
    public void setAttribute(String name, Object value);
    @Deprecated
    public void putValue(String name, Object value);
    public void removeAttribute(String name);
    @Deprecated
    public void removeValue(String name);
    public void invalidate();