查询后的数据库操作问题,找不出什么错误,还望各位帮忙一下!
zmkun 2004-09-10 12:19:44 其中的JAVABEAN的setInsert是执行executeUpdate的,setRs与getRs是得到查询值的,已经证实没有问题,其中query.jsp执行正常,可是删除与修改会出现如下的错误:
exception
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:315)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:258)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:205)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
root cause
java.lang.NullPointerException
org.apache.jsp.modify_jsp._jspService(modify_jsp.java:74)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:268)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:258)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:205)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)