HTTP Status 500 – Internal Server Error

Question

自己在数据库输入一个数据，拿这个数据来登录，登录不成功，就出现这些问题，我是新手，刚接触这个，不是很懂，哪位大佬帮忙看一下错误，谢谢！
Type Exception Report

Message An exception occurred processing JSP page /dengluchuli.jsp at line 37

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

34: if(quanxian.equals("用户")){
35:     
36:     String sql="select * from reg where username='"+username+"' and password='"+password+"'";
37:     ResultSet rs=guanli.GetRs(sql);
38:     if(rs.next()){
39:         
40:         //session.setAttribute("bianhao",""+rs.getString("bianhao")+"");

Answer 1

ResultSet rs=guanli.GetRs(sql);

感觉GetRs这里面出了问题，可以try catch 看看