ÎÒµÄJSPѧϰ±Ê¼Ç JSPÒ³ÃæÖеÄÈýÀà»ù±¾ÔªËØ
JSPÒ³ÃæµÄÈýÀà»ù±¾ÔªËØ
1.ÉùÃ÷
ÐÎÈç
<%!
int a;
int add(int a,int b)
{
return a+b;
}
%>
ÉùÃ÷ÔªËØ<%!.....%>¿ÉÔÚjspÒ³ÃæÖжà´Î³öÏÖ£¬µ«²»Ç¶Ì×£¬ÀïÃæÀ´ÉùÃ÷Ò³Ãæ±äÁ¿ºÍÒ³Ãæº¯Êý£¬À´ÎªÕû¸öÒ³ÃæÊ¹Óã¬ÈçͬjavaÀàÀïÃæµÄÀà±äÁ¿ºÍÀà·½·¨
2.´úÂë
ÐÎÈç
<%
int a;
%>
ÀïÃæÊÇjspµÄ´úÂ룬Èçͬº¯ÊýÄÚ²¿£¬Ëù¶¨ÒåµÄ±äÁ¿£¬ËäÈ»¿ÉÒÔдÈë¶à¸ö<%..%>£¬µ«ÊDz»ÄÜǶÌ×£¬²¢ÇÒÒ»µ©´úÂëÀﶨÒå±äÁ¿£¬ÄÇô¸Ã´úÂëÒÔϵĴúÂ벿·Ö¶¼ÄÜ·ÃÎÊ£¨ÓÐЧ£©£¬²»¹ÜÊDz»ÊÇÔÚͬһ¸ö<%.........%>ÄÚ²¿
3.±í´ïʽ
ÐÎÈç<%=a%>
ÆäÖÐaÊDZäÁ¿»òÕß³£Á¿£¬´ËÓï¾ä½«Ïò¿Í»§¶ËÍøÒ³ÖÐÊä³öaµÄÖµ
Ïà¹ØÎĵµ£º
ÔÚ±¾ÆªÎÄÕÂÖÐ,ÎÒÃǽ«»áÉîÈëÁ˽âÔÚ²»Í¬µÄTag LibraryÃèÊö·û(Tag Library Descriptors:TLDs)ÖÐʹÓø÷ÖÖ²»Í¬µÄtagµÄÇé¿ö.ÎÒÃǽ«»áÒÀ´ÎÑо¿ Ìõ¼þ¡¢Ñ»·¡¢URL¡¢U18N¡¢XMLµÈtagµÄÓ÷¨¡£ÒÔ´ËÀ´Ìá¸ßÄã¶ÔJSTLµÄÈÏʶºÍÓ¦ÓÃÄÜÁ¦,ÔÚÔĶÁ±¾ÎÄǰ£¬ÄãÓ¦¸Ã¶Ô JSP Tag LibÓÐËùÁ˽⣬²¢ÇåÎúÓйØJSTL£¨JSP Standard Tag Libraries£©µÄ»ù± ......
ÔÚJspÖе÷ÓÃSerlvetÖÐÒѾ´æ´¢ÁËÐÅÏ¢µÄ JavaBean.
ServletÖÐÒѾ°ÑÊý¾Ý¿âµÄÐÅÏ¢±£´æµ½JavaBeanÖÐ,ÔÙ°ÑJavaBean±£´æµ½SessionÖÐ.
Jsp¿ªÊ¼µ÷ÓÃ:
<jsp:useBean id="key" type="ClassName" scope="Session" />
<jsp:getProperty name="key" property="PropertyName" />
ÎÞ·¨¶Á³öÐÅÏ¢:
ÔÒò: JavaBean ÖÐÊôÐÔµ ......
×î½ü×öÁËÒ»¸ö×ʷѲéѯģ¿é£¬ÀïÃæÉæ¼°½«×Ê·ÑÐÅÏ¢µ¼³öWordÎĵµºÍExcelÎĵµ£¬
ÏÈ˵˵µ¼³öWordÎĵµ£º
Æäʵ¾ÍÊǰÑÏìÓ¦µÄÀàÐÍÉèΪapplication/msword,È»ºó°ÑÄÚÈÝÊä³öµ½Õâ¸öÎļþ¾ÍÐÐÁË
µÚÒ»²½£º
ÏÈÔÚ×ÀÃæÉÏн¨Ò»¸öwordÎĵµ,Ë«»÷´ò¿ª£¬È»ºóÁí´æÎª.htmÎļþ£¬»á²úÉúÒ»¸öÒÔ.htm½áβµÄÎļþ
µÚ¶þ²½£º
°Ñ.htmÎļþÀ©Õ¹Ãû¸ÄΪ.jspÎļ ......
1 javascript £¬ÉèÖÃÒ»¸ö±äÁ¿£¬Ö»ÔÊÐíÌá½»Ò»´Î¡£
2 »¹ÊÇjavascript£¬½«Ìá½»°´Å¥»òÕßimageÖÃΪdisable
onsubmit="getElById('submitInput').disabled = true; return true;">
3 ÀûÓÃstrutsµÄͬ²½ÁîÅÆ»úÖÆ
......
JSP/Servletת·¢ÓëÖØ¶¨ÏòµÄÇø±ð
¾¡¹ÜHttpServletResponse.sendRedirect ·½·¨ºÍRequestDispatcher.forward ·½·¨¶¼¿ÉÒÔÈÃä¯ÀÀÆ÷»ñµÃÁíÍâÒ»¸öURLËùÖ¸ÏòµÄ×ÊÔ´£¬µ«Á½ÕßµÄÄÚ²¿ÔËÐлúÖÆÓÐןܴóµÄÇø±ð¡£
¡¡¡¡ÏÂÃæÊÇHttpServletResponse.sendRedirect ·½·¨ÊµÏÖµÄÇëÇóÖØ¶¨ÏòÓëRequestDispatcher.forward ·½·¨ÊµÏÖµÄÇëÇó ......