一个运行完好的Jbuilder项目,我把它移植到了Eclipse当中,
运行环境Tomcat5.0,JDK1.4
Sybase12.5,但是在eclipse项目当中却出现了如下的错误:ype 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)
root cause java.lang.NullPointerException
org.apache.jsp.publib.ggym.khlistpopSX_jsp._jspService(khlistpopSX_jsp.java:621)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:127)
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)大家分析一下这是什么错误?
运行环境Tomcat5.0,JDK1.4
Sybase12.5,但是在eclipse项目当中却出现了如下的错误:ype 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)
root cause java.lang.NullPointerException
org.apache.jsp.publib.ggym.khlistpopSX_jsp._jspService(khlistpopSX_jsp.java:621)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:127)
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)大家分析一下这是什么错误?
我觉得重点就是添加外部jar包,弄不好就出问题。还有你是用MyEclipse插件吗?你看你怎么建立的新工程,要建MyEclipse下的Web project项目的。
已经有j2ee.jar了,下面有servlet.jar,难道还需要再额外的加吗?
先看它的621行的代码.
然后找khlistpopSX.jsp与khlistpopSX_jsp.java文件对应的那段代码.问题就出在这里,有空指针.