[求助]我的JSP运行老是报错！_Java Web开发

[求助]我的JSP运行老是报错！

org.apache.jasper.JasperException
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

java.lang.NullPointerException
	electric.dbs.Newsdb.selectsql(Newsdb.java:34)
	org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:63)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
大家帮我看看 是怎么回事？？

搜索更多相关主题的帖子: jasper JSP java apache PRE

----------------解决方案--------------------------------------------------------
空指针问题.可能是你的某些引用没有赋值.声明的时候最好赋值NULL.
试试看看能不能好起来.

----------------解决方案--------------------------------------------------------
哈哈，楼上的同学又错了，初始化的时候赋null那是更加容易抛空指针异常了啊！尽量注意啊！
----------------解决方案--------------------------------------------------------

不过我上回也是空指针,用的是重新赋值空就好咯.

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