package Add;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
 
public class AddSuccessAction extends Action 
{
	private final static String SUCCESS = "success";
 
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception 
{
		MyBean bean = (MyBean) form;
		String cityName = bean.getCn();
		String pincode = bean.getPc();
 
		Connection con = null;
		ResultSet rs = null;
        PreparedStatement stmt = null;
 
		String connectionURL = "jdbc:mysql://localhost:3306/city"; 
 
		try 
		{ 
		    Class.forName("com.mysql.jdbc.Driver"); 
		    con = DriverManager.getConnection (connectionURL,"root","welcome12#"); 
		    String sq = "SELECT city_name,pincode from data ";
			stmt = con.prepareStatement(sq);
			rs = stmt.executeQuery();
			boolean flag = false;
			while (rs.next()) 
			{
				String pic = rs.getString(pincode);
 
				if(pic=="pincode")
				{
					System.out.println("Pincode already exists");
					flag = true;
				}
			}
			if(!flag)
			{
				String sql = "INSERT INTO city (city name,pincode) VALUES('"+cityName+','+pincode+"')";
				stmt = con.prepareStatement(sql);
				stmt.executeUpdate();
			}
		}
		catch (SQLException e) 
		{ 
		    e.printStackTrace(); 
		} 
		catch (Exception e) 
		{ 
		    e.printStackTrace(); 
		} 
		finally 
		{ 
			stmt.close();
			con.close(); 
		} 
		return mapping.findForward(SUCCESS);
	}
 
}

String pic = rs.getString("pincode");

String pic = rs.getString(pincode);

if(pic=="pincode")