Re: unable to compile login jsp code

Lew <>
Sat, 18 Sep 2010 20:26:48 -0400
On 09/18/2010 04:39 AM, vishal17 wrote:

I have a strange problem,first i [sic] wrote the html code for input values
then i [sic] wrote d jsp code as given below for login :
this logincon.jsp is in webapps/test folder

<%@ pageimport="java.sql.*,vishal.dbConn4,java.util.*" %>

Type names should begin with an upper-case letter: 'DbConn4'.

DO NOT indent Usenet posts with TAB characters! Use a maximum of four space
characters per indent level.

Use of scriptlet in a JSP is an antipattern. I haven't done it in a while, so
I don't know why the pageimport doesn't seem to have worked.

     ResultSet rs ;
     String sConn;
    dbConn4 db;
     public void jspInit() {

    dbConn4 db = new dbConn4();

This declaration hides the member declaration, so the member 'db' will remain

Why did you declare 'rs' as a member variable? It should be local.

         sConn = db.DBConnect();
         rs = null;

     String sID = request.getParameter("ID");
         String uname =request.getParameter("uname");
        String pwd =request.getParameter("password");
         //String user=null;
         int t=0;

         rs = db.getData();

I would expect a NullPointerException here.


        String x=rs.getString(1);
        String y=rs.getString(2);

        <jsp:forward page="x.jsp"/>
      else{ t=1;

<%if(t==1) { %>
<jsp:forward page="login1.jsp"/>
  i [sic] wrote java program dbConn4 as below and put this class file
in the test/web-inf/classes/vishal

That should be "test/WEB-INF/classes/..."

And the file in the "vishal" directory is "dbConn4.class", right?

What was the exact compilation command?

(As mentioned, you should spell type names with an initial upper-case letter.)

package vishal;
import java.sql.*;

public class dbConn4


An error occurred at line: 15 in the jsp file: /tbill/login_conn.jsp
dbConn4 cannot be resolved to a type
12: dbConn4 db;
13: public void jspInit() {
15: dbConn4 db = new dbConn4();
16: sConn = db.DBConnect();
17: rs = null;
18: }


lots of thank u [sic] in advance......................

Try giving the type its fully-qualified name (FQN) instead of doing the import
and see if that fixes it.

Either the import didn't work or the class-to-package-to-classpath mapping is


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