这个压缩包里的都是超级经典的java例子

				
				
				
				Getting a Request Header in a JSP Page (Java Developers Almanac Example)
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				The Java Developers Almanac 1.4
				
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				    javax.servlet.jsp
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				        Java Server Pages Headers
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				  e1061. Getting a Request Header in a JSP Page
				
				A JSP page can access the information in the request header by using
				the implicit object request.
				This example retrieves a few items in the request header:
				
				
				    The request method is <%= request.getMethod() %>
				    The request URI is <%= request.getRequestURI() %>
				    The request protocol is <%= request.getProtocol() %>
				    The browser is <%= request.getHeader("user-agent") %>
				
				This example retrieves all the items in the request header:
				
				    <%
				        java.util.Enumeration names = request.getHeaderNames();
				        while (names.hasMoreElements()) {
				            String name = (String)names.nextElement();
				            out.println(name+": "+request.getHeader(name));
				        }
				    %>
				
				See also eX X.
				
				
				
				
				             Related Examples
				
				
				
				
				e1062. 
				    Implementing a Redirect in a JSP Page
				
				
				
				e1063. 
				    Generating an XML Document from a JSP Page
				
				
				
				
				
				
				
				
				        See also: 
				
				    Java Server Pages
				  
				
				
				    Java Server Pages Input
				  
				
				
				    Java Server Pages Output
				  
				
				
				
				
				
				
				
				
				
				© 2002 Addison-Wesley.