求大神来帮我检查下哪里有错误
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: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:541)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:435)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.lang.NullPointerException
org.apache.jsp.login_jsp._jspService(login_jsp.java:85)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.13 logs.
--------------------编程问答-------------------- 登录页面和登录代码看下，首先确保你展示的页面所需的数据数据库是否有，是否对空数据进行过滤和处理了。 --------------------编程问答-------------------- 看看login_jsp.java里面的信息是否从页面传过来了，debug下 --------------------编程问答--------------------
囧，本人初学者，能再解释清楚点吗 --------------------编程问答-------------------- java.lang.NullPointerException
查看login_jsp.java第85行是不是获取的数据为NULL --------------------编程问答--------------------
求大神指点了
--------------------编程问答--------------------
代码都不贴上来，怎么看
--------------------编程问答--------------------
你的login.jsp里面有个变量是null，而你访问了它的属性，你没有判断他是否为null，可以把你login.jsp的代码发上来
补充：Java , Eclipse
