到底出了什么错？

[nicholas_yy]

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

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

exception

org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:358)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)


root cause

java.lang.NullPointerException
org.apache.jsp.code.index_jsp._jspService(index_jsp.java:88)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)


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


tomcat 的信息窗口提示：
sql.executequery:invalid authorization specification:access denied for user:'s kyyj@127.0.0.1'(using password:yse)

[hj12]

你的SQL语句里有null值，就是你有的变量没有值！

[凋零的老树]

好象是你的数据库用户没有权限

[yugona]

可能是因为连接数据库的密码或是用户名不正确导致页面取不到值，因而抛出java.lang.NullPointerException错误。

[凋零的老树]

是不是数据库属性设置成仅windows啊？