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pathan jilani
java servlets with database interaction
1 Answer(s)      3 years and 6 months ago
Posted in : JSP-Servlet


hai friends i am doing a web application in that i have a registration page, after successfully registered it has to display a message like "you have successfully registered" and those values should be saved in to the database.but i am getting an exception like "not enough values" can you please assist how to get rid of this problem what problem i have done if you want i can send sample code.

mycode

import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.sql.*; public class RNewReg extends HttpServlet {
public void doGet(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException { PrintWriter out=res.getWriter(); res.setContentType("text/html"); try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection c=DriverManager.getConnection("jdbc:odbc:online","system","manager"); Statement st=c.createStatement();

           String user=req.getParameter("uid");
           String passwd=req.getParameter("pw");
           String repass=req.getParameter("rpw");  
           String fname=req.getParameter("fname");
           String mname=req.getParameter("mnane");
           String lname=req.getParameter("lname");                                 
           int mobile=Integer.parseInt(req.getParameter("mobile"));
           int land=Integer.parseInt(req.getParameter("land"));
           String email=req.getParameter("email");             
           String empid=req.getParameter("empid");
           String compemail=req.getParameter("compemail");

           ResultSet rs=st.executeQuery("select userid from RUsersInfo");
           boolean exist=false;
           while(rs.next())
           {
                    if(rs.getString(1).equals(user))
                           exist=true; 
           }
           out.println("<html>");
           if(exist==false)
           {
           int i=st.executeUpdate("insert into rusersInfo values('" + user +"','" + passwd + "','"+repass+"," + fname + "','" + mname + "','" + lname + "','" + mobile + "','"+ land+"','" + email+"','"+ empid + "','" + compemail + "')");

           out.println("<body bgcolor=\"lightyellow\">");
           out.println("<form action=\"./regusers.html\">");
           out.println("<font size=4 color=blue>");
           out.println(user + " is Created");
           out.println("<br><input type=submit name=b2 value=Next>");
           out.println("</font></form></body>");
           }
           else
           {
                    out.println("<body bgcolor=lightyellow><font size=4 color=red> Sorry!. An User with " + user +
                    " is already existing.Please Choose another login ID.");
                    out.println("<br><a href=\"newusers.html\">Back..</a>");
                    out.println("</font></body>");                        
           }
           out.println("</html>");
           st.close();
           c.close();
      }
      catch(Exception e)
      {

         out.println(e.toString());
      }
 }
 public void doPost(HttpServletRequest req,HttpServletResponse res)
 throws ServletException,IOException
 {
    doGet(req,res);
 }

}


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February 8, 2011 at 11:42 AM


Connect Servlet with database and insert data

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;

public class InsertServlet extends HttpServlet { 
    public void doPost(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException {
        res.setContentType("text/html");
        PrintWriter out = res.getWriter();
        String name=req.getParameter("name");
        String pass=req.getParameter("pass");
        String address=req.getParameter("address");
int no=Integer.parseInt(req.getParameter("no"));
String gender=req.getParameter("gender");
String country=req.getParameter("country");
try{
Class.forName("com.mysql.jdbc.Driver");
           Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
           Statement st=con.createStatement();
           int i=st.executeUpdate("insert into mail(name,password,address,telno,gender,country) values('"+name+"','"+pass+"','"+address+"',"+no+",'"+gender+"','"+country+"')");
         out.println("Data is inserted successfully");
         con.close();
        }
catch(Exception e){
    System.out.println(e);
}
            }
        }

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