錯誤原因是什麼？菜鳥問題。請大家解答 謝謝解决方案

錯誤原因是什麼？菜鳥問題。請大家解答 謝謝
HTTP   Status   500   -  

--------------------------------------------

type   Exception   report

message  

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:358)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)


root   cause  

java.lang.NullPointerException
org.apache.jsp.TMP1icqpeyzi0_jsp._jspService(TMP1icqpeyzi0_jsp.java:75)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)


note   The   full   stack   trace   of   the   root   cause   is   available   in   the   Tomcat   logs.


--------------------------------------------

Apache   Tomcat/5.0.19

------解决方案--------------------
java.lang.NullPointerException

不是很清楚了吗？

把你这个TMP1icqpeyzi.jsp的源代码贴出来。帮你看。
------解决方案--------------------
空指针异常 有什么没有加载完全贴代码吧。
------解决方案--------------------
在Tomcat 5.0\work\Catalina\localhost\项目名\org.apache.jsp\目录下 找到TMP1icqpeyzi0_jsp.java第75行 就可以看到具体的错误了
------解决方案--------------------
java.lang.NullPointerException

空指针

我估计在这
String GuanLiNo = request.getParameter( "GuanLiNo ");
String Projectname = request.getParameter( "Projectname ");
String PartNo = request.getParameter( "PartNo ");

你做一个
if(GuanLiNo == null)
{
GuanLiNo = " ";
}
那两个你自己做
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this request.,http://www..net/java-web/317.html