HTTP Status 500 - 错误怎么解决，我快疯了。

显示全部楼层 · 2009-9-27 10:21:22

用tomcat打开.jsp网页时出现下面错误，怎么办啊？？各位大哥。
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: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.baocool.reg3_jsp._jspService(reg3_jsp.java:71)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)

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)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

--------------------------------------------------------------------------------
Apache Tomcat/5.0.28

千问 · 2009-9-27 10:21:22

ava.lang.NullPointerException
空指针异常，这个问题很容易出现，查找你的
eg3_jsp.java:文件的71行，在tomcat\work目录下搜索这个文件，看看他的71行，然后对应修改你的jsp源文件，加上空指针处理即可，例如
[php]
String name = "";
name = request.getParameter("name&quot

;
if(name != null){
//在进行相应的代码操作,比如截取字符串
name = name.substring(...);
...
}
[/php]