Jsp/Servlet澶嶄範绗旇-----绗?绔?JSP琛ㄨ揪寮忚瑷€
8.1 琛ㄨ揪寮忚瑷€绠€浠?
JSP鐢ㄤ簬鍦ㄧ綉椤典笂鏄剧ず鍔ㄦ€佸唴瀹癸紝閫氬父闇€瑕佸湪JSP椤甸潰涓祵鍏ava鑴氭湰浠ュ畬鎴愬鏉傚姛鑳姐€備絾鏄ぇ閲忕殑Java鑴氭湰浣垮緱JSP椤甸潰闅句互缁存姢銆備竴绉嶇被浼糐avaScript璇█鈥擩SP琛ㄨ揪寮忚瑷€鍙敤浜庡湪缃戦〉涓婄敓鎴愬姩鎬佸唴瀹癸紝骞朵唬鏇縅SP鑴氭湰鍏冪礌銆侸SP琛ㄨ揪寮忚瑷€鏄粠JSP2.0瑙勮寖寮€濮嬫敮鎸佺殑鎶€鏈€?
8.2 绂佺敤EL 琛ㄨ揪寮忚绠?
8.3 鍙橀噺
8.4 闅愬紡瀵硅薄
8.5 鏂囧瓧甯搁噺
8.6 杩愮畻绗?
8.7 淇濈暀瀛?
8.8 琛ㄨ揪寮忎娇鐢ㄦ渚?
   8.9 鏈珷灏忕粨 

EL鐨勪富瑕佸姛鑳斤細
绮剧‘鐨勮闂瓨鍌ㄥ璞?
Bean灞炴€х殑绠€鐣ヨ娉?
绌哄€煎彇浠ｉ敊璇秷鎭?

涔嬪墠浠ｇ爜锛?
Java浠ｇ爜
1.<%  
2.    pageContext.setAttribute("name","darkness");  
3.%>  
4.<%  
5.    if(pageContext.getAttribute("name") != null)  
6.    {  
7.%>  
8.        <%=pageContext.getAttribute("name")%>  
9.<%  
10.    }  
11.%>  
12. 
13.<!--鍙互鍙戠幇锛岃繖鏍凤紝浠ｇ爜杈冨-->  
14.<%  
15.    pageContext.setAttribute("name","darkness");  
16.%> 
<%
pageContext.setAttribute("name","darkness");
%>
<%
if(pageContext.getAttribute("name") != null)
{
%>
<%=pageContext.getAttribute("name")%>
<%
}
%>

<!--鍙互鍙戠幇锛岃繖鏍凤紝浠ｇ爜杈冨-->
<%
pageContext.setAttribute("name","darkness");
%>
${name}
浣跨敤琛ㄨ揪寮忔椂涓嶉渶瑕佸幓鍒ゆ柇灞炴€ф槸鍚︿负绌?
Java浠ｇ爜
1.<!--濡傛灉鍦ㄤ笉鍚岀殑灞炴€ц寖鍥翠腑璁剧疆浜嗗悓鍚嶇殑灞炴€э紝鍒欎箣鍚庣殑鍚屽悕灞炴€ф棤娉曟壘鍒?->  
2.<!--鎸夌収鍥涗腑鏍囧織浣嶆潵瀵绘壘-->  
3.<%  
4.    pageContext.setAttribute("name","darkness");  
5.    request.setAttribute("name","darkness");  
6.%>  
7.${name} 
<!--濡傛灉鍦ㄤ笉鍚岀殑灞炴€ц寖鍥翠腑璁剧疆浜嗗悓鍚嶇殑灞炴€э紝鍒欎箣鍚庣殑鍚屽悕灞炴€ф棤娉曟壘鍒?->
<!--鎸夌収鍥涗腑鏍囧織浣嶆潵瀵绘壘-->
<%
pageContext.setAttribute("name","darkness");
request.setAttribute("name","darkness");
%>
${name}

EL鐨勪富瑕佸姛鑳藉湪浜嶮VC璁捐妯″紡涔嬩腑
鍚庡彴锛?
Java浠ｇ爜
1.package org.sky.darkness.servlet.el ;  
2. 
3.import java.io.* ;  
4.import javax.servlet.* ;  
5.import javax.servlet.http.* ;  
6. 
7.public class ELServletDemo01 extends HttpServlet  
8.{  
9.    public void doGet(HttpServletRequest req,HttpServletResponse resp) throws IOException,ServletException  
10.    {  
11.        req.setAttribute("name","www.sky.org") ;  
12.        // 鏈嶅姟鍣ㄧ璺宠浆  
13.        req.getRequestDispatcher("eldemo03.jsp").forward(req,resp) ;  
14.    }  
15.    public void doPost(HttpServletRequest req,HttpServletResponse resp) throws IOException,ServletException  
16.    {  
17.        this.doGet(req,resp) ;  
18.    }  
19.};  
20./* 
21.  <servlet> 
22.    <servlet-name>el01</servlet-name> 
23.    <servlet-class> org.sky.darkness.servlet.el.ELServletDemo01</servlet-class> 
24.  </servlet> 
25.  <servlet-mapping> 
26.    <servlet-name>el01</servlet-name> 
27.    <url-pattern>/eldemo