createStatement出错,该如何处理

HTTP Status 500 - --------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: An exception occurred processing JSP page /zqwu/stinfos.jsp at line 2825: catch(SQLException e){26: out.println("Connection database fail!");27: }28: Statement stmt=conn.createStatement();29: ResultSet result=stmt.executeQuery("select * from studentsinfo");30: %>31: <p></p>Stacktrace:    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521)    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:430)    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)root cause java.lang.NullPointerException    org.apache.jsp.zqwu.stinfos_jsp._jspService(stinfos_jsp.java:81)    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)note The full stack trace of the root cause is available in the Apache Tomcat/6.0.33 logs.