电脑蛋疼、上不了网、求助！！！

问题描述：

HTTP Status 500 -

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

type Exception report

message

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

exception

javax.servlet.ServletException: can not get a datasource！
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.login_jsp._jspService(login_jsp.java:137)
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)
com.cernet.cmas3.web.filter.MenuFilter.doFilter(MenuFilter.java:55)
com.cernet.cmas3.web.filter.SessionCheckFilter.doFilter(SessionCheckFilter.java:108)
com.cernet.cmas3.web.filter.SessionGenerateFilter.doFilter(SessionGenerateFilter.java:132)
com.cernet.web.HttpServletRequestFilter.doFilter(HttpServletRequestFilter.java:26)
com.cernet.cmas3.web.filter.InputWrapperFilter.doFilter(InputWrapperFilter.java:31)
com.cernet.cmas3.web.filter.QueryStringCheckFilter.doFilter(QueryStringCheckFilter.java:91)

root cause

java.sql.SQLException: can not get a datasource！
com.cernet.util.ConnectionManager.getConnection(ConnectionManager.java:83)
com.cernet.util.ConnectionManager.getConnection(ConnectionManager.java:25)
org.apache.jsp.login_jsp._jspService(login_jsp.java:116)
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)
com.cernet.cmas3.web.filter.MenuFilter.doFilter(MenuFilter.java:55)
com.cernet.cmas3.web.filter.SessionCheckFilter.doFilter(SessionCheckFilter.java:108)
com.cernet.cmas3.web.filter.SessionGenerateFilter.doFilter(SessionGenerateFilter.java:132)
com.cernet.web.HttpServletRequestFilter.doFilter(HttpServletRequestFilter.java:26)
com.cernet.cmas3.web.filter.InputWrapperFilter.doFilter(InputWrapperFilter.java:31)
com.cernet.cmas3.web.filter.QueryStringCheckFilter.doFilter(QueryStringCheckFilter.java:91)

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

请问这是什么情况、本人是校园网的、宿舍其他人都挺好的、我发现这个情况后重装了一遍系统后还是不行。

帮忙哦！！！！！！！！

问题解答：

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