Java开发网 - jsp+mysql出现问题啊?

Topic: jsp+mysql出现问题啊?

1.jsp+mysql出现问题啊?

Posted by: taozhhong
Posted on: 2007-04-12 14:04

java.lang.NullPointerException
  at com.mysql.jdbc.ResultSet.extractStringFromNativeColumn(ResultSet.java:827)
  at com.mysql.jdbc.ResultSet.getNativeConvertToString(ResultSet.java:3289)
  at com.mysql.jdbc.ResultSet.getNativeString(ResultSet.java:3710)
  at com.mysql.jdbc.ResultSet.getStringInternal(ResultSet.java:4906)
  at com.mysql.jdbc.ResultSet.getString(ResultSet.java:4739)
  at org.apache.tomcat.dbcp.dbcp.DelegatingResultSet.getString(DelegatingResultSet.java:174)
  at bbs.bbstz.bbstzList2.bbstzlist(bbstzList2.java:53)
  at org.apache.jsp.forum_jsp._jspService(forum_jsp.java:311)
  at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
  at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
  at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:833)
  at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:639)
  at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1285)
  at java.lang.Thread.run(Thread.java:595)
2007-4-12 12:25:46 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
2007-4-12 12:54:02 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
  at com.mysql.jdbc.ResultSet.findColumn(ResultSet.java:933)
  at com.mysql.jdbc.ResultSet.getString(ResultSet.java:4755)
  at org.apache.tomcat.dbcp.dbcp.DelegatingResultSet.getString(DelegatingResultSet.java:224)
  at bbs.bbs_smallclass.SmalclassList.smalllcasslist(SmalclassList.java:47)
  at org.apache.jsp.leftmenu_jsp._jspService(leftmenu_jsp.java:94)
  at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
  at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
  at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:833)
  at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:639)
  at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1285)
  at java.lang.Thread.run(Thread.java:595)

日志中打印出如下信息啊........这是什么错误呢?请个位帮忙啊?

2.Re:jsp+mysql出现问题啊? [Re: taozhhong]	Copy to clipboard
Posted by: cxp108 Posted on: 2007-04-13 09:08 看上去像你的JDBC驱动有问题，你的JDBC版本和Mysql的版本对应么？