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rtexprvalueµÄÈ«³ÆÊÇ Run-time Expression Value£¬ ËüÓÃÓÚ±íʾÊÇ·ñ¿ÉÒÔʹÓÃJSP±í´ïʽ.
µ±ÔÚ<attribute>±êÇ©ÀïÖ¸¶¨<rtexprvalue>true</rtexprvalue>ʱ£¬ ±íʾ¸Ã×Ô¶¨Òå±êÇ©µÄijÊôÐÔµÄÖµ¿ÉÒÔÖ±½ÓÖ¸¶¨»òÕßͨ¹ý¶¯Ì¬¼ÆËãÖ¸¶¨, example as follow:
<sql:query var="result" >
    select * from mytable order by nameid
</sql:query>
<%request.setAttribute("nameid", "2"); %>
<myTag:cupSize cupSize="1" cupSizes="${result}"></myTag:cupSize>
<myTag:cupSize cupSize="${nameid}" cupSizes="${result}"></myTag:cupSize>
µ±ÔÚ<attribute>±êÇ©ÀïÖ¸¶¨<rtexprvalue>false</rtexprvalue>ʱ£¬ ±íʾ¸Ã×Ô¶¨Òå±êÇ©µÄijÊôÐÔµÄÖµÖ»ÄÜÖ±½ÓÖ¸¶¨, example as follow:
<myTag:cupSize cupSize="1" cupSizes="${result}"></myTag:cupSize>


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netbeans´´½¨jspµÄÄ£°æÖÐÊÇ£º<%@page contentType="text/html" pageEncoding="UTF-8"%>£¬½«ÕâÐиijÉÒÔÏÂÕâÑù¾Í¿ÉÒÔÕý³£ÏÔʾÖÐÎÄ£º
<%@page language="java" pageEncoding=utf-8" %>
<%@page contentType=” ......

JSPÖÐÖ±½Óµ÷ÓÃSpring½Ó¹ÜµÄJAVABEAN

<%
    ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());
    List stafflist = ((StaffDAO)ctx.getBean("StaffDAO")).findAll();
    request.setAttribute("stafflist",stafflist);
%> ......

servlet¡¢jspÖлñµÃÏîÄ¿¾ø¶Ô·¾¶

servletÖлñµÃÏîÄ¿¾ø¶Ô·¾¶
String filePath=this.getServletConfig().getServletContext().getRealPath("/");
¸ùĿ¼Ëù¶ÔÓ¦µÄ¾ø¶Ô·¾¶:request.getServletPath();
ÎļþµÄ¾ø¶Ô·¾¶ :request.getSession().getServletContext().getRealPath(request.getRequestURI())
µ±Ç°webÓ¦Óõľø¶Ô·¾¶ :servletConfig.getServletCo ......

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дһ¸öjspÒ³Ãæ£¬·ÃÎÊʱÏÔʾ´ÓÏÂÃæµÄÒ³ÃæÌ ......
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