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();这是HttpSesion接口的代码，去掉了注释，方法没有几个，从中看setAttribute()的方法，看完这个方法就明白了，这是cookie的翻版。有几个弃用的方法，能用的方法并不是很多。
HttpSession的认识
原文地址：https://www.cnblogs.com/Robin008/p/10201955.html