MSSQL2000打过SP4补丁还是提示空指针错误 跪求各位帮忙 顶的也有分

Question

我用的是微软的JDBC驱动 
没想到运行出现错误 到处找方法 说打到SP4的补丁可以解决（小弟的是SP3补丁）
可是打了之后还是那样 能帮我想想办法吗type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
org.apache.jsp.newbook_jsp._jspService(newbook_jsp.java:79)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause java.lang.NullPointerException
org.apache.jsp.left_jsp._jspService(left_jsp.java:182)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
org.apache.jsp.newbook_jsp._jspService(newbook_jsp.java:79)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

Answer 1

空指针不一定是数据库的问题,也不一定是数据库操作语句的问题,有时候是你变量的问题.
先在MSSQL里调试一下你的SQL语句,看有没有问题.
如果没问题,再调试你程序中SQL上下一部分的语句.

Answer 2

left.jsp中，出现了空指针的错误。
找到编译成的left_jsp.java中的182行，看看那行有什么，处理下，应该就没有问题了。

Answer 3

java.lang.NullPointerException
=========================================================
对啊，楼主这是空值问题，看看你是不是操作了没有被实例化的对象

Answer 4

java.lang.NullPointerException
=========================================================
对啊，楼主这是空值问题，看看你是不是操作了没有被实例化的对象
-----------------------------------------------------------
是有一个null的空对象。你对其进行操作了