弄了好几天,问题还没解决,数据库NullPointerException问题
错误代码org.apache.jasper.JasperException: Exception in JSP: /updateShow.jsp:40
37: else
38: {
39: a=Integer.parseInt(temp1);
40: rs.updateInt(2,a);
41: }
42:
43: a2=request.getParameter("chinesegrade");
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.lang.NullPointerException
sun.jdbc.odbc.JdbcOdbcBoundCol.setRowValues(Unknown Source)
sun.jdbc.odbc.JdbcOdbcResultSet.updateInt(Unknown Source)
org.apache.jsp.updateShow_jsp._jspService(updateShow_jsp.java:83)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.26 logs.