<%@ page contentType="text/html;charset=GB2312"%> <html> <body> <form action="e_4.jsp" method=get name=form> <p>输入数: <input type="text" name="csn" size="4" maxlength="4" value="0"> <br> <input type="submit" value="送出" name="submit"> </form> <% String str=request.getParameter("csn"); out.print(str); %> </body> </html>
生成网页后,什么也不输,直接点"送出"出现以下问题,请大家指教?
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException