Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

JSPÍøÕ¾ÒÆÖ² - Java / Web ¿ª·¢

ÎÒͬѧÓÃMyEclipse×öµÄÒ»¸öÍøÕ¾´«À´¸øÎҵģ¬ÔÚËûÄDZßÄÜÔËÐС£ÎÒµ¼Èëµ½ÏîÄ¿£¬Êý¾Ý¿âÒ²¸½¼ÓÁË(SP4²¹¶¡)£¬tomcatÒ²Æô¶¯ÁË£¬·¢²¼ÒԺ󣬽øÈëÒ³ÃæÃ»ÎÊÌ⣬µ«ÊÇÖ»ÒªÊÇÉè¼Æµ½Êý¾Ý¿âµÄÒ³Ãæ£¬È«¶¼Êǿհ׵ģ¬ÍøÉϲéÁËÐèÒªÐÞ¸ÄxmlʲôµÄ£¬ÎÒ²»»á£¬Ï£Íû´ó¼ÒÄܰï°ïÎÒ£¬ÎÒÊÇС°×£¬Ã»Åö¹ýÍøÕ¾±àÐ´ÒÆÖ²·¢²¼Ö®ÀàµÄÊÂ~~´ó¼Ò±ðÅç~~~·Ð»Ð»´ó¼ÒÁË


ÎÒÔËÐÐÍøÕ¾Ê×ҳûÎÊÌ⣬½øÈëµÇ½½çÃæÒÔºóÊäÈëÕ˺ÅÃÜÂë¾Í³öÏÖÕâÑùµÄ´úÂ룺

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

javax.servlet.ServletException: java.lang.NullPointerException
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:523)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)


root cause 

java.lang.NullPointerException
bean.SelectBean.select(SelectBean.java:55)
action.LoginAction.execute(LoginAction.java:61)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419


Ïà¹ØÎÊ´ð£º

JSP/Servlet½»»¥ - Java / Web ¿ª·¢

JSPÒ³ÃæÖÐÓжà¸öradio°´Å¥
  JSPÒ³Ãæ½«²ÎÊýPOST¸øservlet
  
  ÒªÇóÈçÏÂ;
  1.Ñ¡ÔñÒ»¸öradio£¬µ÷ÓÃservlet servletÖиù¾Ý²ÎÊýµ÷ÓÃÆäËû½Ó¿Ú£¬³ý·ÇÑ¡ÖиÃradio²¢µã»÷JSPÖеÄʵР......

java socket email ÎÊÌâ - Java / Java SE

ÎÒÔÚ javaºËÐļ¼ÊõÉÏ ¿´ÁËÒ»¸ö ÀûÓà Java socket emailµÄÀý×Ó ¿ÉÊÇÔõôҲ ²»³É¹¦ Ϊʲô£¿
Ô´Âë
Java code:

package cn.com.test.email;
import java.awt.GridBagLayout;
import java.awt.event.Action ......

javaÖд«Öµ - Java / Web ¿ª·¢

ÔõôÑù½«id´«¹ýÈ¥°¡£¿£¿£¿ÊǼòµ¥µÄ´«¡£¡£¡£ÔÚµØÖ·À¸ÖÐдidºÅ
LZ ºÃÓÄĬ£¡²»ÖªµÀÄãµÄÒâ˼£¿

ÊÇÏë°ÑID ´«µ½ACTION ? ͨ¹ýURl id=?

²»¹»Ïêϸ ±ðÈ˲»ÖªµÀÔõÑù°ïÄã

../XXXXX.do?id=XXXX&id2=XXXXX

......

mysqlµÄ¸üÐÂÓï¾ä - Java / Java SE

id name datetime
1 a 2010-05-13 10:15:00
2 b 2010-05-14 09:10:00
3 d 2010-05-14 10:10:00
ÈçºÎ½«¾àÀëĿǰ×î½üµÄÄǸö¼Ç¼µÄname ¸üÐÂΪ¡°x¡±ÄØ
лл¿© °¡ ºÇºÇ
update table_n ......

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;

ÒýÓÃ
text-decoration:underline; cur ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ