Question

jsp 500错误

HTTP Status 500 -

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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.index_jsp._jspService(index_jsp.java:121)
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.

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Apache Tomcat/6.0.13

Answer 1

你的问题是index.jsp页面的代码报了空指针异常
java.lang.NullPointerException
org.apache.jsp.index_jsp._jspService(index_jsp.java:121)
你去看下tomcat目录下的work文件夹下，项目文件夹下找到index_jsp.java文件，看看第121行的代码，那行代码出现了空指针，应该是调用了没有实例的对象

Answer 2

出现空指针异常了，仔细检查一下吧

Answer 3

空指针，不知道你用的什么服务器，不过一般都可以到work目录下查一下你的java文件的121行，是什么。然后修改你的jsp就好了