How I call a java class from my jsp.. please

[asti1987]

I have a big problem, y need to print a jasper report, but it must to be with jsp.
this is my jsp


please help me

<%@ page import="java.io.*,java.util.*,java.net.*,java.sql.*,imprimir.imprimir" %>

<%


if(request.getParameter("GRABAR") != null)

{

// objetos de enlace

Connection canal = null;

ResultSet tabla= null;

Statement instruccion=null;


// abriendo canal o enlace en su propio try-catch

try {

Class.forName("com.mysql.jdbc.Driver").newInstance();

canal=DriverManager.getConnection("jdbc:mysql:///cablevision_atc", "root", "");

instruccion = canal.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,

ResultSet.CONCUR_UPDATABLE);

} catch(java.lang.ClassNotFoundException e){} catch(SQLException e) {};

//cargando los campos a grabar

// excepto clave porque en mysql es de tipo auto-increment

int estado = 0;


String q="insert into ticket(estado_ticket) values(\"" +estado+"\"); ";

try {

// agregando renglon (insert)

int n=instruccion.executeUpdate(q);

//avisando que se hizo la instruccion

out.println("REGISTRO INSERTADO");

imprimir print = new imprimir();




} catch(SQLException e) {out.println(e);};

try{

// tabla.close();

instruccion.close();

canal.close();

} catch(SQLException e) {out.println(e);};

};




// construyendo forma dinamica

out.println("<FORM ACTION=index.jsp METHOD=post>");

//out.println("NOMBRE :<INPUT TYPE=TEXT NAME=NOMBRE><BR>");

//out.println("EDAD :<INPUT TYPE=TEXT NAME=EDAD><BR>");

//out.println("ESTATURA:<INPUT TYPE=TEXT NAME=ESTATURA><BR>");

out.println("<INPUT TYPE=SUBMIT NAME=GRABAR VALUE=INSERTAR ><BR>");

out.println("</FORM>");

%>

and this is my class

package imprimir;

import java.sql.*;
import net.sf.jasperreports.engine.xml.JRXmlLoader;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.design.JasperDesign;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.view.JasperViewer;



public class imprimir {


    /**
     * Constructor for ReportDriver
     */
    public imprimir() {

    }

  
    public static Connection connectDB(String databaseName, String userName, String password) {
        Connection jdbcConnection = null;
        try{
            Class.forName("com.mysql.jdbc.Driver").newInstance ();
            jdbcConnection = DriverManager.getConnection("jdbc:mysql:///cablevision_atc", "root", "");
        }catch(Exception ex) {
            String connectMsg = "Could not connect to the database: " + ex.getMessage() + " " + ex.getLocalizedMessage();
            System.out.println(connectMsg);
        }
        return jdbcConnection;
    }

   
    public static void runReport(String databaseName, String userName, String password,String reportFile) {
        try{
            JasperDesign jasperDesign = JRXmlLoader.load(reportFile);
            JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
            Connection jdbcConnection = connectDB(databaseName, userName, password);
            JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, null, jdbcConnection);
            JasperViewer.viewReport(jasperPrint);
            //JasperPrintManager.printPages(jasperPrint,0,jasperPrint.getPages().size()-1,true);


        }catch(Exception ex) {
            String connectMsg = "Could not create the report " + ex.getMessage() + " " + ex.getLocalizedMessage();
            System.out.println(connectMsg);
        }
    }

    
     
    public static void main(String[] args) {

            String databaseName = "cablevision_atc";
            String userName = "root";
            String password = "";
            String reportFile = "C:\\wamp\\www\\Cablevision\\JAVA\\ticket.jrxml";

            runReport(databaseName, userName, password, reportFile);

        return;

    } }