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我买jsp程序开发范例宝典.其中的088事例出问题
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2008-02-24
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<P>我导入数据库db_database05后.用yog工具打开mysql数据库.里面的db_database05数据库的db_manager表单怎么提示说没有这个表单啊...点了一下就没了.是什么问题?急救啊..在我没看数据库前.我按事例说的在tomcat中导入088范例.登陆了<A href="http://localhost:8080/088">http://localhost:8080/088</A>能成功登陆.但在输入用户名和密码后.就出错了.报错如下:</P>
<H1>HTTP Status 500 - </H1>
<HR noShade SIZE=1>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>type</FONT></B> Exception report</P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>message</FONT></B> <U></U></P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>description</FONT></B> <U>The server encountered an internal error () that prevented it from fulfilling this request.</U></P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>exception</FONT></B> <PRE>org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
</PRE>
<P></P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>root cause</FONT></B> <PRE>java.lang.NullPointerException
com.core.Deal.checkManager(Deal.java:14)
org.apache.jsp.deal_jsp._jspService(org.apache.jsp.deal_jsp:62)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
</PRE>
<P></P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>note</FONT></B> <U>The full stack trace of the root cause is available in the Apache Tomcat/5.5.12 logs.</U></P>
<HR noShade SIZE=1>
<H3>Apache Tomcat/5.5.12</H3>
<P> </P>
<H1>HTTP Status 500 - </H1>
<HR noShade SIZE=1>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>type</FONT></B> Exception report</P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>message</FONT></B> <U></U></P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>description</FONT></B> <U>The server encountered an internal error () that prevented it from fulfilling this request.</U></P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>exception</FONT></B> <PRE>org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
</PRE>
<P></P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>root cause</FONT></B> <PRE>java.lang.NullPointerException
com.core.Deal.checkManager(Deal.java:14)
org.apache.jsp.deal_jsp._jspService(org.apache.jsp.deal_jsp:62)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
</PRE>
<P></P>
<P><B><FONT style="BACKGROUND-COLOR: #525d76" color=#ffffff>note</FONT></B> <U>The full stack trace of the root cause is available in the Apache Tomcat/5.5.12 logs.</U></P>
<HR noShade SIZE=1>
<H3>Apache Tomcat/5.5.12</H3>
<P> </P>