hola mennn..si no es muy tarde..te djo esto..se que te servira yo pase por eso tambien pidiendo ayuda y ahora me toca ayudar es un jframe cambia los valores por los tuyos..si tienes dudas preguntalas men saludos
package accesosimple;
import javax.swing.*;
import javax.swing.*;
import javax.swing.*;
import java.io.*;
import java.sql.*;
import java.awt.Panel.*;
import java.awt.*;
import java.awt.event.*;
public class ingreso extends javax.swing.JFrame {
public ingreso() {
super("INGRESO-VALIDACION DE USUARIO");
initComponents();
setTitle("Autentificacion de usuarios");
setSize(500,390); // Tamanio del Frame
setResizable(false); // que no se le pueda cambiar el tamanio
//Centrar la ventana de autentificacion en la pantalla
Dimension tamFrame=this.getSize();//para obtener las dimensiones del frame
Dimension tamPantalla=Toolkit.getDefaultToolkit().getScreenSize(); //para obtener el tamanio de la pantalla
setLocation((tamPantalla.width-tamFrame.width)/2, (tamPantalla.height-tamFrame.height)/2); //para posicionar
setVisible(true); // Hacer visible al frame
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jpnl_login = new javax.swing.JPanel();
btnlogin = new javax.swing.JButton();
btncancelar = new javax.swing.JButton();
lblusuario = new javax.swing.JLabel();
lblacceso = new javax.swing.JLabel();
lblpasswd = new javax.swing.JLabel();
txtPass = new javax.swing.JPasswordField();
txtUser = new javax.swing.JFormattedTextField();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setName("login"); // NOI18N
jpnl_login.setBorder(javax.swing.BorderFactory.createTitledBorder("VALIDACION DE USUARIO"));
btnlogin.setText("Login");
btnlogin.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnloginActionPerformed(evt);
}
});
btncancelar.setText("Cancelar");
btncancelar.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btncancelarActionPerformed(evt);
}
});
lblusuario.setText("Usuario:");
lblacceso.setFont(new java.awt.Font("Trebuchet MS", 1, 12));
lblacceso.setForeground(new java.awt.Color(255, 102, 102));
lblacceso.setText("ACCESO-VALIDACION DE USUARIO");
lblpasswd.setText("Password:");
txtUser.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
txtUserActionPerformed(evt);
}
});
javax.swing.GroupLayout jpnl_loginLayout = new javax.swing.GroupLayout(jpnl_login);
jpnl_login.setLayout(jpnl_loginLayout);
jpnl_loginLayout.setHorizontalGroup(
jpnl_loginLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jpnl_loginLayout.createSequentialGroup()
.addContainerGap()
.addComponent(btnlogin, javax.swing.GroupLayout.PREFERRED_SIZE, 74, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 140, Short.MAX_VALUE)
.addComponent(btncancelar)
.addGap(89, 89, 89))
.addGroup(jpnl_loginLayout.createSequentialGroup()
.addGroup(jpnl_loginLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jpnl_loginLayout.createSequentialGroup()
.addComponent(lblusuario, javax.swing.GroupLayout.PREFERRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(txtUser))
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jpnl_loginLayout.createSequentialGroup()
.addComponent(lblpasswd, javax.swing.GroupLayout.PREFERRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(txtPass, javax.swing.GroupLayout.PREFERRED_SIZE, 93, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(209, 209, 209))
.addGroup(jpnl_loginLayout.createSequentialGroup()
.addGap(47, 47, 47)
.addComponent(lblacceso, javax.swing.GroupLayout.PREFERRED_SIZE, 213, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(128, Short.MAX_VALUE))
);
jpnl_loginLayout.setVerticalGroup(
jpnl_loginLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jpnl_loginLayout.createSequentialGroup()
.addGap(16, 16, 16)
.addComponent(lblacceso)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jpnl_loginLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(lblusuario, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(jpnl_loginLayout.createSequentialGroup()
.addGap(28, 28, 28)
.addComponent(txtUser, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(36, 36, 36)
.addGroup(jpnl_loginLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(lblpasswd, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(txtPass, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 80, Short.MAX_VALUE)
.addGroup(jpnl_loginLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btnlogin)
.addComponent(btncancelar))
.addGap(25, 25, 25))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(37, 37, 37)
.addComponent(jpnl_login, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(24, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jpnl_login, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void txtUserActionPerformed(java.awt.event.ActionEvent evt) {
}
private void btnloginActionPerformed(java.awt.event.ActionEvent evt) {
ingreso ap=new ingreso();
ap.setVisible(false);
try
{
//chekar si el usuario escrbio el nombre de usuario y pw
if (txtUser.getText().length() > 0 && txtPass.getText().length() > 0 )
{
// Si el usuario si fue validado correctamente
if( validarUsuario( txtUser.getText(), txtPass.getText() ) ) //enviar datos a validar
{
int answer= JOptionPane.showConfirmDialog(null,"BIENVENIDO DESEA CONTINUAR","ACCCESO",JOptionPane.YES_OPTION);
if (answer == JOptionPane.YES_OPTION)
{
setVisible(false);
principal start = new principal();
start.show();
}
// Codigo para mostrar la ventana principal
setVisible(false);
//VentanaPrincipal ventana1 = new VentanaPrincipal();
//ventana1.show();
}
else
{
JOptionPane.showMessageDialog(null, "El nombre de usuario y/o contrasenia no son validos.");
JOptionPane.showMessageDialog(null, txtUser.getText()+" " +txtPass.getText() );
txtUser.setText(""); //limpiar campos
txtPass.setText("");
txtUser.requestFocusInWindow();
}
}
else
{
JOptionPane.showMessageDialog(null, "Debe escribir nombre de usuario y contrasenia.\n" +
"NO puede dejar ningun campo vacio");
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
private void btncancelarActionPerformed(java.awt.event.ActionEvent evt) {
//
String message = "REALMENTE DESEA SALIR DEL SISTEMA";
String title = "Acceso Al Sistema";
int answer = JOptionPane.showConfirmDialog(null, message, title, JOptionPane.YES_NO_CANCEL_OPTION);
if (answer == JOptionPane.YES_OPTION)
{
System.exit(0); // clicked yes
}
else if (answer == JOptionPane.NO_OPTION)
{
// clicked no
}
}
public boolean validarUsuario(String elUsr, String elPw) throws IOException
{
try
{
//nombre de la BD: bdlogin
//nombre de la tabla: usuarios
// id integer auto_increment not null <--llave primaria
// campos: usuario char(25)
// password char(50)
Class.forName("com.mysql.jdbc.Driver");
Connection unaConexion = DriverManager.getConnection ("jdbc:mysql://localhost/almacen","root", "12345");
// Preparamos la consulta
Statement instruccionSQL = unaConexion.createStatement();
ResultSet resultadosConsulta = instruccionSQL.executeQuery ("SELECT * FROM usuario WHERE nombre='"+elUsr+"' AND password='"+ elPw+"'");
if( resultadosConsulta.first() ) // si es valido el primer reg. hay una fila, tons el usuario y su pw existen
return true; //usuario validado correctamente
else
return false; //usuario validado incorrectamente
}
catch (Exception e)
{
e.printStackTrace();
return false;
}
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(
new Runnable() {
public void run() {
new ingreso().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton btncancelar;
private javax.swing.JButton btnlogin;
private javax.swing.JPanel jpnl_login;
private javax.swing.JLabel lblacceso;
private javax.swing.JLabel lblpasswd;
private javax.swing.JLabel lblusuario;
private javax.swing.JPasswordField txtPass;
private javax.swing.JFormattedTextField txtUser;
// End of variables declaration
}
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