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我是新手,谁可以告诉我,为什么会产生这个错误吗?

pdskiller 发布于 2005-04-04 11:37, 744 次点击

HTTP Status 500 -


type Exception report

message

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

exception

java.lang.NullPointerException
	acec.dbConn.executeQuery(dbConn.java:77)
	acec.LoginCheck.doGet(LoginCheck.java:34)
	acec.LoginCheck.doPost(LoginCheck.java:54)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

2 回复
#2
yaojing2005-08-13 16:58
空指针异常。。
#3
rainic2005-08-13 21:39
JAVA中有指针???
1