jsp el 表达式和 jsp:include page include

The following are reserved words in the JSP EL:

and 

eq

gt

true

instanceof

or

ne

lt

false

empty

not

if

ge

null

div

mod



Expression-Language Implicit Objects

applicationScope

cookie

header

headerValues

initParam

pageContext

pageScope

param

paramValues

requestScope

sessionScope



Custom Tag:

BodyTag interface



-------

JDBBC: Java Database Connectivity

using the java.sql.DriverManager

The java.sql.DriverManager is a standard part of JDE



------------

Most of the O/R frameworks support these four approaches, so let's take a look at each one.





















/////////////////////////////////////////////////////////////////////////////////////////////

9 implicit objects in JSP:



request

response

out

sessin

application



config

page   :   implicit page object references an instance of the JSP's page impementation.

pageContxt  :  a pageContext instane provides the JSP developer with access to all the 

	available JSP scopes and to serveral useful page attributes, such as the current

	request and response, the ServletContext, HttpSession,ServletConfig to name but a few.

exception  





Directives:

<%@ page import="java.util.Date, java.text.*" pageEncoding="utf-8" %>



<%@ include file="./foot.jsp" %>





In JSP 2.1,there are there types of action elements:

1.Standard actions

2.Customer actions

3.JSTL actions



Standard Actions:

e.g.: 
 
   
    
  Action

the 
  
    
      action will include any output generated by the included resource directly to the JspWriter assigned to the implicit out variable. This means that you cann specify any different type of web resouce, such as another Jsp or servlet, as long as it produces content of the same type of web resource,such as another JSP page or servlet, as long as it produces content of the same type as the calling JSP page.