Jsp ELÓï·¨
Jsp ELÓï·¨
Àý£º
${sessionScope.user.sex}
ËùÓÐEL¶¼ÊÇÒÔ ${ ΪÆðʼ¡¢ÒÔ} Ϊ½áβµÄ¡£
ÉÏÊöEL·¶ÀýµÄÒâ˼ÊÇ£º´ÓSessionÈ¡µÃÓû§µÄÐÔ±ð¡£Èç¹ûʹÓÃ֮ǰJSP´úÂëµÄд·¨ÈçÏ£º
<%
User user = (User)session.getAttribute(”user”);
String sex = user.getSex( );
%>
Á½ÕßÏà±È½Ï֮ϣ¬¿ÉÒÔ·¢ÏÖELµÄÓï·¨±È´«Í³JSP´úÂë¸üΪ·½±ã¡¢¼ò½à¡£
ELÌṩ . ºÍ [ ] Á½ÖÖÔËËã·ûÀ´´æÈ¡Êý¾Ý£¬[ ]¿ÉÒÔ·ÃÎʼ¯ºÏ»òÕßÊÇÊý×éµÄÔªËØ¡¢BeanµÄÊôÐÔ¡£
ÏÂÁÐÁ½ÕßËù´ú±íµÄÒâ˼ÊÇÒ»ÑùµÄ£¬µ«ÊÇÐèÒª±£Ö¤ÒªÈ¡µÃ¶ÔÏóµÄÄǸöµÄÊôÐÔÓÐÏàÓ¦µÄsetXxx()ºÍgetXxx()·½·¨²ÅÐС£
Àý£º
${sessionScope.user.sex}
µÈÓÚ ${sessionScope.user["sex"]}
. ºÍ [ ] Ò²¿ÉÒÔͬʱ»ìºÏʹÓã¬ÈçÏ£º
${sessionScope.shoppingCart[0].price}
·µ»Ø½á¹ûΪshoppingCartÖеÚÒ»ÏîÎïÆ·µÄ¼Û¸ñ¡£
ÔÚELÖУ¬×Ö·û´®¼È¿ÉÒÔʹÓÔabc”£¬¿ÉÒÔʹÓÃ’abc’¡£
ELÔËËã·û
ELµÄËãÊõÔËËã·ûºÍJavaÖеÄÔËËã·ûµÄ´óÖÂÏàͬ£¬ÓÅÏȼ¶Ò²Ïàͬ¡£
×¢Ò⣺’+’ ÔËËã·û²»»áÁ¬½Ó×Ö·û´®ÁË£¬ËûÖ»ÓÃÓÚ¼Ó·¨ÔËËã¡£
EL¹ØϵÔËËã·ûÓÐÒÔÏÂÁù¸öÔËËã·û
¹ØϵÔËËã·û ˵ Ã÷ ·¶ Àý ½á¹û
= = »ò eq | µÈÓÚ |${ 5 = = 5 } »ò ${ 5 eq 5 } | true
!= »ò ne | ²»µÈÓÚ |${ 5 != 5 } »ò ${ 5 ne 5 } | false
< »ò lt | СÓÚ |${ 3 < 5 }»ò ${ 3 lt 5 } | true
> »ò gt | ´óÓÚ |${ 3 > 5 }»ò ${ 3 gt 5 } | false
<= »ò le | СÓÚµÈÓÚ |${ 3 <= 5 }»ò ${ 3 le 5 } | true
>= »ò ge | ´óÓÚµÈÓÚ |${ 3 >= 5 }»ò ${ 3 ge 5 } | false
emptyÔËËã·û
EmptyÔËËã·ûÖ÷ÒªÓÃÀ´ÅжÏÖµÊÇ·ñΪnull»ò¿ÕµÄ£¬ÀýÈ磺
${ empty param.name }
½ÓÏÂÀ´ËµÃ÷EmptyÔËËã·ûµÄ¹æÔò£º
{empty} A
Èç¹ûAΪnullʱ£¬·µ»Øtrue
Èç¹ûA²»´æÔÚʱ£¬·µ»Øtrue
Èç¹ûAΪ¿Õ×Ö·û´®Ê±£¬·µ»Øtrue
Èç¹ûAΪ¿ÕÊý×é
Ïà¹ØÎĵµ£º
¸´Ñ¡¿òµÄʹÓü°JSP¶ÔÊý¾ÝµÄ´¦Àí
<!--
Description: HTML±íµ¥¸´Ñ¡¿ò¼°JSP´¦Àí²âÊÔ
Author: pxzl
Date: 2009-08-05 15:12:43
-->
<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%
String[] cheArray1=request.getParameterValues("chkbox1");
String[] cheArray2=req ......
֮ǰ,д¹ýÒ»¸öDownload.jspÎļþ,Äܽâ¾öÏÂÔØÎļþÂÒÂëÎÊÌâ(ÖîÈç:DOC,XSLÎļþµÈµÈ).
ºóÀ´·¢ÏÖ,Óö¼ûÖÐÎÄÃûµÄÎļþµÄʱºò,ÎļþÏÂÔؽ«»á±¨´í~~~~
½ñÌì,ͨ¹ý¸ÄдÔDownload.jspÎļþÒÑÍêÈ«½â¾öÁËÕâ¸öÎÊÌâ~
Ä¿Ç°,°ÑÒ»ÕûÌ×µÄÎļþÉÏ´«ÏÂÔصķ½·¨¸øÌù³öÀ´~~~ÒÔ±ã´ó¼Ò½è¼ø!~!~!~!~!
×÷Õß:¹Å°£¼°·¨ÀÏ
------------------------ ......
this.state="01";ͨ³£µÄ×ö·¨ÊÇдһ¸öÀࣨ½Ó¿Ú£©À´´æ·Å³£Á¿
public interface MyConstant
{
public static final String STATE_01= "01";
}
È»ºóÔÚ³ÌÐòÖÐÕâÑùд¾Í¿ÉÒÔÁË
this.state=MyConstant.STATE_01;
ÔÚJava³ÌÐòÖÐÕâÑù¾Í¿ÉÒÔ±ÜÃâÓ²±àÂëÁË¡£¿ÉÊÇJSPÖÐÄØ£¿µ±È»£¬Èç¹ûJSPÖÐÔÊÐíʹÓÃScripletµÄ»°µ±È»Ò²¿ÉÒÔÖ±½ÓʹÓó ......
<%@ page contentType="text/html; charset=GBK" language="java"%>
<%
String[] cookiename = {"JSESSIONID","SECURE_AUTH_ROOT_COOKIE","SECURITY_AUTHENTICATION_COOKIE"};
for(int index = 0, len = cookiename.length; index < len; index ++) {
javax.servlet.http.Cookie c = new javax.s ......
servlet--------------------------------------------JSP
HttpServletRequest request
HttpServletResponse &nbs ......