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jspʵÏÖÒ»¸ö¼òµ¥µÄ×¢²áÌø×ª½çÃæ - Java / Web ¿ª·¢

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////////////////////////////////////////////////////////////////////////////////////////////
exception 
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause 
java.lang.NullPointerException
sql.login.executeQuery(login.java:49)
org.apache.jsp.reg_jsp._jspService(reg_jsp.java:68)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
//////////////////////////////////////////////////////////////////////////////////////////////

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JSP/Servlet½»»¥ - Java / Web ¿ª·¢

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tomcat»·¾³ÏÂjsp±àÒë´íÎó£¬Çó½â£¡ - Java / Web ¿ª·¢

org.apache.jasper.JasperException: Unable to compile class for JSP: 
An error occurred at line: 52 in the jsp file: /vip_info.jsp
ÕË cannot be resolved
49: <table border="1& ......

java ÇóÖú - Java / Java EE

insert into [ScholarshipManagement].[dbo].[department] ([department],[specialization] ,[grade]) output inserted.departmentID values(? ,? ,? )
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jspºÍtomcatÎÊÌ⣬¿ì·èÁË - Java / Java EE

ÎÒдÁ˸öjspÒ³Ãæ£¬È»ºó¸Ä¶¯ÁËһϣ¬¸Ä¶¯µÄÄÚÈݾÍÊÇÔÚjspÒ³ÃæµÄjsº¯ÊýÀï¼ÓÁ˸öalert()Óï¾ä£¬µ«ÊÇÎÒ·ÃÎÊÕâ¸öÒ³ÃæÊ±£¬ËÀ»î¶¼ÊÇÔ­À´Ò³ÃæµÄÄÚÈÝ£¬ÎÒ¼ÓÁ˺ܶàalertº¯Êý»¹ÊÇû¸Ä¶¯Ç°µÄÒ³ÃæÄÚÈÝ£»tomcatÖØÆôÁË£¬Ò²ÖØÐ²¿ÊðÕâ ......

Ä£Äâhref µÄ cssÑùʽ - Java / Web ¿ª·¢

ÏÖÔÚ²»ÏëÓÃ<a> </a> ±êÇ© £¬ÒòΪµã»÷ºó»á³öÏÖÒ³ÃæÖØ¶¨Î»£¬¸øÎÄ×Ö¼ÓÉÏcssÑùʽ¾Í¿ÉÒÔ¿´ÆðÀ´ ÊÇhrefÔõôʵÏÖÕâÑùµÄcss
text-decoration:underline; cursor:hand;

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