Data is not inserting correctly in mysql database.

Hello Sir, below is my code to insert data into database by list iteration through for loop but it is not getting inserted ..it is taking only one value for each data cloumn ..at the time of end of the query... PLz see my code and point my mistake. Thank you Sir...

import java.io.*; import java.math.BigDecimal; import java.sql.*; import java.util.*;

public class NewProcessing {

private static String destination;

public static void main(String[] args) {
    ArrayList data = new ArrayList();
    String str = "9035";
    int cost = 0;
    String AreaCode = null;
    int Rate = 0;
    int dur = 0;
    String calldate = null;
    String clid = null;
    String src = null;
    String dst = null;
    String dcontext = null;
    String channel = null;
    String dstchannel = null;
    String lastapp = null;
    String duration = null;
    String lastdata = null;
    String billsec = null;
    String disposition = null;
    String amaflags = null;
    String accountcode = null;
    String uniqueid = null;
    String userfield = null;
    try {
        Connection con = null;
        Class.forName("com.mysql.jdbc.Driver");
        con = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/asteriskcdrdb", "root", "techsoft");
        Statement st = con.createStatement();
        ResultSet rs = st.executeQuery("Select * from asteriskcdrdb.sp1 where areacode = '" + str + "'");

        while (rs.next()) {
            AreaCode = rs.getString("AreaCode");
            //System.out.println(AreaCode);
            String Pulse = rs.getString("Pulse");
            Rate = rs.getInt("Rate/pulse");
            // System.out.println(Rate);
        }
        rs.close();
        st.close();
    } catch (Exception e) {
        System.out.println(e);


    }
    if (AreaCode.equals(str)) {
        //System.out.println("Hii");
        try {
            Connection conn = null;
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/asteriskcdrdb", "root", "techsoft");
            Statement stmt = conn.createStatement();
            ResultSet rst = stmt.executeQuery("Select * from cdr where src ='9035020090'");

            while (rst.next()) {


                while (rst.next()) {
                    calldate = rst.getString("calldate");

                    //System.out.println(calldate);
                    clid = rst.getString("clid");
                    src = rst.getString("src");
                    dst = rst.getString("dst");
                    dcontext = rst.getString("dcontext");
                    channel = rst.getString("channel");
                    dstchannel = rst.getString("dstchannel");
                    lastapp = rst.getString("lastapp");
                    lastdata = rst.getString("lastdata");
                    duration = rst.getString("duration");
                    // System.out.println(duration);
                    dur = Integer.parseInt(duration);
                    data.add(dur);
                    //System.out.println(dur);
                    billsec = rst.getString("billsec");
                    disposition = rst.getString("disposition");
                    amaflags = rst.getString("amaflags");
                    accountcode = rst.getString("accountcode");
                    uniqueid = rst.getString("uniqueid");
                    userfield = rst.getString("userfield");
                }
            }
        } catch (Exception e) {
            System.out.println(e);
        }
    }

    for (int i = 0; i < data.size(); i++) {
        System.out.println(data);
        int c=(int) data.get(i);
        System.out.println(c);
        int min = 60;
       // System.out.println(dur);
        int quotient = c / min;
       // System.out.println(quotient);

        int reminder =c % min;
      //  System.out.println(reminder);

        if (reminder > 0) {
            quotient = quotient + 1;
            System.out.println(quotient);
            cost = quotient * Rate;
            System.out.println(cost);

            try {
                Connection conn = null;
                Class.forName("com.mysql.jdbc.Driver");
                conn = DriverManager.getConnection(
                        "jdbc:mysql://localhost:3306/asteriskcdrdb", "root",
                        "techsoft");

                Statement stmt = conn.createStatement();

                 System.out.println(cost);
                System.out.println("update cdr set cdrcost ='" + cost + "'  where src ='9035020090'");
         stmt.executeUpdate("update cdr set cdrcost ='" + cost + "'  where src ='9035020090'");

                // stmt.executeUpdate("insert into cdrcost  (calldate,clid,src,dst,dcontext,channel,dstchannel,lastapp,lastdata,duration,billsec,disposition,amaflags,accountcode,uniqueid,userfield,cdrcost) values ('" + calldate + "','" + clid + "','" + src + "','" + dst + "','" + dcontext + "','" + channel + "','" + dstchannel + "','" + lastapp + "','" + lastdata + "','" + duration + "','" + billsec + "','" + disposition + "','" + amaflags + "','" + accountcode + "','" + uniqueid + "','" + userfield + "','" + cost + "')");
             } catch (Exception e) {
                System.out.println(e);
            }
        }

    }
}

}