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 Æä´úÂëÈçÏÂ:
<%@page language="java" contentType="text/html"  import="java.util.*"  %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core"  prefix="c"%>
<html>
  <body>
  <%
int a=9;
int b=0;
try{
%>
<%=(a/b)%>
<%
}catch(Exception e){
out.println("page error");//Êä³öµ½µ±Ç°Ò³Ãæ
out.println("<br>");
out.println(e.getMessage());
System.out.print(e.getMessage());//Êä³öµ½¿ØÖÆÌ¨
}
%>
<c:catch var="error_Message"> //½øÐгý0µÄ´íÎó²¶×½
<h1><%=3/0 %>3/0</h1>
</c:catch>
<c:out value="${error_Message}" />//½«²¶×½µ½µÄ´íÎóÐÅÏ¢Êä³öµ½µ±Ç°Ò³Ãæ
  </body>
</html>
ÔËÐнá¹ûÈçÏÂ:
page error
/ by zero
java.lang.ArithmeticException: / by zero
ÁíÍâJSP»¹ÓÐÒ»ÖÖ´íÎóÒ³ÃæµÄÌø×ª,ÈçÏÂ:
<%@page language="java" contentType="text/html"  import="java.util.*" errorPage="error.jsp" %>
¼ÓÁËÒ»¾äerrorPage="error.jsp".
error.jsp´úÂëÈçÏÂ:
<%@page language="java" contentType="text/html" isErrorPage="true" %>
<html>
  <body>
    <h1><%=exception.getMessage()%></h1>
  </body>
</html>
´ËÒ³ÃæµÄÖØµãÊÇÔÚµÚÒ»¾äÖмÓÈëisErrorPage="true" ¾ä,ĬÈÏÇé¿öÏÂΪfalse.
µ±Ê±²âÊÔʱÈçÏ´úÂë:
<%=3/0%>,ÆäËüµÄʲô¶¼²»ÓÃд,Èç¹ûÔÚµ±Ç°Ò³ÒÑÖ¸¶¨ÁËerrorPage="error.jsp"ÏîÔò»á½øÐÐÌø×ª,Ä¿±êΪerror.jspÒ³.ÎÒÔÚ²âÊÔʱµÚÒ»´ÎÖ´ÐÐJSPÒ³ÃæÊ±ÊDZ༭²»¹ýÈ¥ÁË,±¨"http 500 ÄÚ²¿·þÎñÆ÷´íÎó",Èç¹û½«ÆäÖеÄ0¸Ä³É·Ç0ÊýÔò¿Éͨ¹ý,ÔÚÖ´ÐÐÆÚ¼äÔٸĻØ0ÊÇ¿ÉÒÔÕý³£Ö´ÐеÄ,ÔÚÎÒÏëÀ´ÊÇjsp±à¼­µÄÎÊÌâ°É,Ò²²»Ô¸ÒâÔÙÉîÈëÑо¿ÁË,Èç¹ûË­Óа취½â¾ö,¿ÉÒÔ¸æËßÎÒ,ÏÈÐиÐлÁË!~~
»¹ÓÐÔÚweb.xmlÖеĴ¦Àí·½·¨,ÅäÖÃerror-pageÏî,ÈçÏÂÁ½Àý:
<error-page>
        <error-code>500</error-code>
        <location>/error.jsp</location>
  </error-page>
ÕâÊÇÅäÖ÷¢Éú500´íÎó(¼´·þÎñÆ÷ÄÚ²¿´íÎó£©Ê±£¬Ìø×ªµ½´íÎó´¦ÀíÒ³Ãæerror.jsp.


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½â¾öjsp»òserverlet ²»ÄܽâÎömultipart/form

½â¾öjsp»òserverlet ²»ÄܽâÎömultipart/form-data ÀàÐÍµÄ±íµ¥ÓòµÄÎÊÌâ
10 6ÔÂ 2008
Situation:
Javax.servlet.HttpServletRequest.getParameter(String) returns null when the ContentType is multipart/form-data
Solutions:
Solution A:
1. download http://www.servlets.com/cos/index.html
2. invoke getPara ......

JSPÖÐÁ¬½ÓSQL 2000Êý¾Ý¿âµÄÎÊÌâ×ܽá

 
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¡¡¡¡Ê×ÏÈÊÇSQL
2000Êý¾Ý¿âµÄ°²×°ÎÊÌ⣬ÔÚ´ËÎÒÖ÷Òª½²Ð©¹ØÓÚSQL 2000µÄ°æ±¾Óë²Ù×÷ϵͳµÄ¼æÈÝÐÔÎÊÌ⣺SQL
2000×ܹ²ÓÐ7¸ö²»Í¬°æ±¾£¬ÊÊ ......

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ÅäÖóÌÐòµÄÔËÐÐĿ¼ÓëJDBCÊý¾ÝÔ´:
<Context path="/test" docBase="F:\JSPLesson\test" reloadable="true">
    <Resource name="jdbc/bookstore" auth="Container" type="javax.sql.DataSource"
              maxActive="1 ......

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JSPµÄÔËÐлúÖÆ£º
JSPÈÝÆ÷¹ÜÀíJSPÒ³ÃæÉúÃüÖÜÆÚµÄÁ½¸ö½×¶Î£º×ª»»½×¶ÎºÍÖ´Ðн׶Ρ£µ±ÓÐÒ»¸ö¶ÔJSPÒ³ÃæµÄ¿Í»§ÇëÇóµ½À´Ê±£¬JSPÈÝÆ÷¼ìÑéJSPÒ³ÃæµÄÓï·¨ÊÇ·ñÕýÈ·£¬½«JSPÒ³Ãæ×ª»»ÎªServletÔ´Îļþ£¬È»ºóµ÷ÓÃjavac¹¤¾ßÀà±àÒëServletÔ´ÎļþÉú³É×Ö½ÚÂëÎļþ£¬ÕâÒ»½×¶ÎÊÇת»»½×¶Î¡£½ÓÏÂÀ´£¬ServletÈÝÆ÷¼ÓÔØ×ª»»ºóµÄServletÀ࣬ʵÀý»¯Ò»¸ ......

Jsp ELÓï·¨

Jsp ELÓï·¨
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${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·¨± ......
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