1. EJEMPLOS DESARROLLADOS (NETBEANS – SQL SERVER)<br />MANTENIMIENTO DE CLIENTE<br />----------------------------------------------------------------<br />package alfa;<br />import java.sql.*;<br />import javax.swing.*;<br />public class mancli extends javax.swing.JFrame {<br /> private Connection cn;<br /> private Statement st;<br /> private ResultSet rs;<br /> private boolean rnuevo = false;<br /> private String cod = quot;
quot;
;<br /> private String cmdSQL = quot;
quot;
;<br /> public mancli() {<br /> initComponents();<br /> }<br /> private void formWindowOpened(java.awt.event.WindowEvent evt) { <br /> try {<br /> conexion();<br /> rs.next();<br /> mostrar();<br /> cn.setAutoCommit(false);// los cambios deben conf<br /> } catch (SQLException ex) {<br /> System.err.println(quot;
Error en conexion:quot;
+ ex.getMessage());<br /> }<br /> } <br /> private void btnPrimeroActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> rs.first();<br /> mostrar();<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnUltimoActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> rs.last();<br /> mostrar();<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnAnteriorActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> if (rs.isFirst()) {<br /> mensaje(quot;
Primer registroquot;
);<br /> } else {<br /> rs.previous();<br /> mostrar();<br /> }<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnSiguienteActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> if (rs.isLast()) {<br /> mensaje(quot;
Ultimo registroquot;
);<br /> } else {<br /> rs.next();<br /> mostrar();<br /> }<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnNuevoActionPerformed(java.awt.event.ActionEvent evt) { <br /> txtCodcli.setText(quot;
quot;
);<br /> txtCliente.setText(quot;
quot;
);<br /> txtDireccion.setText(quot;
quot;
);<br /> txtLcredito.setText(quot;
quot;
);<br /> chkExtranjero.setSelected(false);<br /> setControles(false);<br /> setEditar(true);<br /> txtCodcli.requestFocus();<br /> rnuevo = true;<br /> } <br /> private void btnModificarActionPerformed(java.awt.event.ActionEvent evt) { <br /> setControles(false);<br /> setEditar(true);<br /> cod = txtCodcli.getText().trim();<br /> txtCodcli.requestFocus();<br /> } <br /> private void btnCancelarActionPerformed(java.awt.event.ActionEvent evt) { <br /> boolean conf = confirmax(quot;
Cancelar cambiosquot;
);<br /> if (conf) {<br /> setControles(true);<br /> setEditar(false);<br /> rnuevo = false;<br /> mostrar();<br /> }<br /> } <br /> private void btnGuardarActionPerformed(java.awt.event.ActionEvent evt) { <br /> boolean conf = confirmax(quot;
Guardar cambiosquot;
);<br /> if (conf) {<br /> try {<br /> int x;<br /> x = chkExtranjero.isSelected() ? 1 : 0;<br /> if (rnuevo) {<br /> cmdSQL = quot;
Insert into Clientes (Cod_cli,Cliente,Direccion,Lcredito,Extranjero)quot;
<br /> + quot;
Values('quot;
<br /> + txtCodcli.getText().trim()<br /> + quot;
','quot;
<br /> + txtCliente.getText().trim()<br /> + quot;
','quot;
<br /> + txtDireccion.getText().trim()<br /> + quot;
',quot;
<br /> + txtLcredito.getText().trim()<br /> + quot;
,quot;
<br /> + String.valueOf(x) + quot;
)quot;
;<br /> st.executeUpdate(cmdSQL);<br /> mensaje(quot;
Registro adicionadoquot;
);<br /> rnuevo = false;<br /> } else {<br /> cmdSQL = quot;
Update Clientes set cod_cli='quot;
<br /> + txtCodcli.getText().trim()<br /> + quot;
',cliente='quot;
<br /> + txtCliente.getText().trim()<br /> + quot;
',Direccion='quot;
<br /> + txtDireccion.getText().trim()<br /> + quot;
',Lcredito=quot;
<br /> + txtLcredito.getText().trim()<br /> + quot;
,Extranjero=quot;
+ String.valueOf(x)<br /> + quot;
where cod_cli='quot;
+ cod + quot;
'quot;
;<br /> st.executeUpdate(cmdSQL);<br /> mensaje(quot;
Registro modificadoquot;
);<br /> }<br /> cmdSQL = quot;
Select * from Clientesquot;
;<br /> rs = st.executeQuery(cmdSQL);<br /> setControles(true);<br /> setEditar(false);<br /> rs.next();<br /> mostrar();<br /> } catch (Exception x) {<br /> System.err.println(quot;
Error al guardar:quot;
+ x.getMessage());<br /> }<br /> }<br /> } <br /> private void btnEliminarActionPerformed(java.awt.event.ActionEvent evt) { <br /> boolean conf = confirmax(quot;
Eliminar registroquot;
);<br /> if (conf) {<br /> try {<br /> cmdSQL = quot;
Delete from Clientes where quot;
<br /> + quot;
cod_cli='quot;
+ txtCodcli.getText().trim()<br /> + quot;
'quot;
;<br /> st.executeUpdate(cmdSQL);<br /> // rs.first();<br /> cmdSQL = quot;
Select * from Clientesquot;
;<br /> rs = st.executeQuery(cmdSQL);<br /> rs.next();<br /> mostrar();<br /> } catch (Exception x) {<br /> }<br /> }<br /> } <br /> private void btnBuscarActionPerformed(java.awt.event.ActionEvent evt) { <br /> String codbus = JOptionPane.showInputDialog(null,<br /> quot;
Ingrese codigo a Buscarquot;
);<br /> boolean encontrado = busqueda(codbus);<br /> if (encontrado) {<br /> mostrar();<br /> } else {<br /> mensaje(quot;
Codigo no encontradoquot;
);<br /> }<br /> } <br /> private void btnSalirActionPerformed(java.awt.event.ActionEvent evt) { <br /> boolean salirsi = confirmax(quot;
Cerrar formularioquot;
);<br /> if (salirsi) {<br /> try {<br /> boolean conf = confirmax(quot;
Guardar todos los cambiosquot;
);<br /> if (conf) {<br /> cn.commit();// confirma cambios<br /> } else {<br /> cn.rollback(); // deshace cambios<br /> }<br /> cn.setAutoCommit(true);// los cambios no se conf<br /> rs.close();<br /> st.close();<br /> cn.close();<br /> mensaje(quot;
Conexion cerradaquot;
);<br /> System.exit(0);<br /> } catch (Exception x) {<br /> System.out.println(quot;
Error al cerrar tabla Clientes:quot;
<br /> + x.getMessage());<br /> }<br /> //ocultar();<br /> }<br /> } <br /> // Metodos del usuario<br /> public void mostrar() {<br /> try {<br /> rs.refreshRow();<br /> txtCodcli.setText(rs.getString(quot;
cod_cliquot;
));<br /> rs.refreshRow();<br /> txtCliente.setText(rs.getString(quot;
clientequot;
));<br /> rs.refreshRow();<br /> txtDireccion.setText(rs.getString(quot;
direccionquot;
));<br /> rs.refreshRow();<br /> txtLcredito.setText(String.valueOf(rs.getFloat(quot;
lcreditoquot;
)));<br /> rs.refreshRow();<br /> chkExtranjero.setSelected(rs.getBoolean(quot;
extranjeroquot;
));<br /> } catch (Exception ex) {<br /> System.err.println(quot;
Error en registro:quot;
+ ex.getMessage());<br /> }<br /> }<br /> public static boolean confirmax(String msj) {<br /> int r = JOptionPane.showConfirmDialog(null, msj, quot;
quot;
,<br /> JOptionPane.YES_NO_OPTION);<br /> if (r == JOptionPane.YES_OPTION) {<br /> return true;<br /> } else {<br /> return false;<br /> }<br /> }<br /> public void setControles(boolean estado) {<br /> btnPrimero.setEnabled(estado);<br /> btnAnterior.setEnabled(estado);<br /> btnSiguiente.setEnabled(estado);<br /> btnUltimo.setEnabled(estado);<br /> btnNuevo.setEnabled(estado);<br /> btnModificar.setEnabled(estado);<br /> btnEliminar.setEnabled(estado);<br /> btnBuscar.setEnabled(estado);<br /> btnPrimero.setEnabled(estado);<br /> btnAnterior.setEnabled(estado);<br /> btnSiguiente.setEnabled(estado);<br /> btnSalir.setEnabled(estado);<br /> btnGuardar.setEnabled(!estado);<br /> btnCancelar.setEnabled(!estado);<br /> }<br /> public void setEditar(boolean estado) {<br /> txtCodcli.setEditable(estado);<br /> txtCliente.setEditable(estado);<br /> txtDireccion.setEditable(estado);<br /> txtLcredito.setEditable(estado);<br /> chkExtranjero.setEnabled(estado);<br /> }<br /> public boolean busqueda(String xcod) {<br /> boolean encontrado = false;<br /> int nra;<br /> try {<br /> nra = rs.getRow();<br /> rs.beforeFirst();<br /> boolean neof = rs.next();<br /> while (neof && !encontrado) {<br /> if (rs.getString(quot;
cod_cliquot;
).equals(xcod.trim())) {<br /> encontrado = true;<br /> } else {<br /> neof = rs.next();<br /> }<br /> }<br /> if (!encontrado) {<br /> rs.absolute(nra);<br /> }<br /> } catch (Exception x) {<br /> System.err.println(quot;
Error en busqueda:quot;
+ x.getMessage());<br /> }<br /> return encontrado;<br /> }<br /> public void conexion() {<br /> try {<br /> String driver = quot;
com.microsoft.sqlserver.jdbc.SQLServerDriverquot;
;<br /> String url = quot;
jdbc:sqlserver://localhost;databaseName=Facturacionquot;
;<br /> /*String driver = quot;
sun.jdbc.odbc.JdbcOdbcDriverquot;
;<br /> String url = quot;
jdbc:odbc:SQLFacturacionquot;
;*/<br /> Class.forName(driver);<br /> cn = DriverManager.getConnection(url, quot;
saquot;
, quot;
123quot;
);<br /> st = cn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,<br /> ResultSet.CONCUR_UPDATABLE);<br /> rs = st.executeQuery(quot;
Select * from Clientesquot;
);<br /> } catch (Exception ex) {<br /> System.err.println(quot;
Error en busqueda:quot;
+ ex.getMessage());<br /> }<br /> }<br /> public void mensaje(String msj) {<br /> JOptionPane.showMessageDialog(null, msj);<br /> }<br /> public static void main(String args[]) {<br /> java.awt.EventQueue.invokeLater(new Runnable() {<br /> public void run() {<br /> new mancli().setVisible(true);<br /> }<br /> });<br /> }<br />BUSCAR CLIENTES<br />-----------------------------------------------------------<br />package alfa;<br />import java.sql.Connection;<br />import java.sql.DriverManager;<br />import java.sql.ResultSet;<br />import java.sql.Statement;<br />import javax.swing.DefaultListModel;<br />public class Buscli extends javax.swing.JFrame {<br /> Connection cn = null; // variable de conexion<br /> Statement st = null; // variable de instruccion SQL<br /> ResultSet rs = null; // variable de registros o filas<br /> public Buscli() {<br /> initComponents();<br /> }<br />private void formWindowOpened(java.awt.event.WindowEvent evt) { <br /> conexion();<br /> llenarLista();<br /> } <br /> private void txtClibusKeyReleased(java.awt.event.KeyEvent evt) { <br /> String cmdSQL = quot;
quot;
;<br /> cmdSQL = quot;
Select * from Clientes Where cliente Like 'quot;
<br /> + txtClibus.getText().trim() + quot;
%'quot;
;<br /> try {<br /> rs = st.executeQuery(cmdSQL);<br /> } catch (Exception ex) {<br /> }<br /> llenarLista();<br /> } <br />private void conexion() {<br /> try {<br /> // odbc<br /> //String driver = quot;
sun.jdbc.odbc.JdbcOdbcDriverquot;
;<br /> //String url = quot;
jdbc:odbc:SQLFacturacionquot;
;<br /> // sql Server nativo<br /> String driver = quot;
com.microsoft.sqlserver.jdbc.SQLServerDriverquot;
;<br /> String url = quot;
jdbc:sqlserver://localhost;databaseName=Facturacionquot;
;<br /> Class.forName(driver);<br /> cn = DriverManager.getConnection(url, quot;
saquot;
, quot;
123quot;
);<br /> st = cn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,<br /> ResultSet.CONCUR_READ_ONLY);<br /> rs = st.executeQuery(quot;
Select * from Clientesquot;
);<br /> } catch (Exception ex) {<br /> System.err.println(quot;
Error en conexion:quot;
+ ex.getMessage());<br /> }<br /> }<br /> private void llenarLista() {<br /> modelo.clear(); // vaciamos la lista<br /> try {<br /> rs.beforeFirst();<br /> while (rs.next()) {<br /> modelo.addElement(rs.getString(quot;
cod_cliquot;
) + quot;
quot;
+ rs.getString(quot;
clientequot;
));<br /> }<br /> } catch (Exception ex) {<br /> }<br /> }<br /> public static void main(String args[]) {<br /> java.awt.EventQueue.invokeLater(new Runnable() {<br /> public void run() {<br /> new Buscli().setVisible(true);<br /> }<br /> });<br /> }<br />VISUALIZAR CLIENTES (DRIVER SQL)<br />-------------------------------------------------------------<br />package alfa;<br />import java.sql.Connection;<br />import java.sql.DriverManager;<br />import java.sql.ResultSet;<br />import java.sql.Statement;<br />import javax.swing.JOptionPane;<br />public class Viscli extends javax.swing.JFrame {<br /> // variables globales<br /> Connection cn = null; // variable de conexion<br /> Statement st = null; // variable de instruccion SQL<br /> ResultSet rs = null; // variable de registros o filas<br /> /** Creates new form Viscli */<br /> public Viscli() {<br /> initComponents();<br /> }<br />private void formWindowOpened(java.awt.event.WindowEvent evt) { <br /> conexion();<br /> } <br /> private void btnPrimeroActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> rs.first();<br /> mostrar();<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnUltimoActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> rs.last();<br /> mostrar();<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnAnteriorActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> if (rs.isFirst()) {<br /> JOptionPane.showMessageDialog(null, quot;
Inicio de la tablaquot;
);<br /> } else {<br /> rs.previous(); // ir al anterior registro<br /> mostrar();<br /> }<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnSiguienteActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> if (rs.isLast()) {<br /> JOptionPane.showMessageDialog(null, quot;
Final de la tablaquot;
);<br /> } else {<br /> rs.next();<br /> mostrar();<br /> }<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnSalirActionPerformed(java.awt.event.ActionEvent evt) { <br /> int rsp;<br /> rsp = JOptionPane.showConfirmDialog(null, quot;
Cerrar formularioquot;
,<br /> quot;
Salirquot;
, JOptionPane.YES_NO_OPTION);<br /> if (rsp == JOptionPane.YES_OPTION) {<br /> this.dispose();<br /> }<br /> } <br /> private void conexion() {<br /> try {<br /> // odbc<br /> //String driver = quot;
sun.jdbc.odbc.JdbcOdbcDriverquot;
;<br /> //String url = quot;
jdbc:odbc:SQLFacturacionquot;
;<br /> // sql Server nativo<br /> String driver = quot;
com.microsoft.sqlserver.jdbc.SQLServerDriverquot;
;<br /> String url = quot;
jdbc:sqlserver://localhost;databaseName=Facturacionquot;
;<br /> Class.forName(driver);<br /> cn = DriverManager.getConnection(url, quot;
saquot;
, quot;
123quot;
);<br /> st = cn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,<br /> ResultSet.CONCUR_READ_ONLY);<br /> rs = st.executeQuery(quot;
Select * from Clientesquot;
);<br /> rs.next();<br /> mostrar();<br /> } catch (Exception ex) {<br /> System.err.println(quot;
Error en conexion:quot;
+ ex.getMessage());<br /> }<br /> }<br /> private void mostrar() {<br /> try {<br /> txtCodcli.setText(rs.getString(quot;
cod_cliquot;
));<br /> txtCliente.setText(rs.getString(quot;
clientequot;
));<br /> txtDireccion.setText(rs.getString(quot;
direccionquot;
));<br /> txtLcredito.setText(String.valueOf(rs.getFloat(quot;
Lcreditoquot;
)));<br /> chkExtranjero.setSelected(rs.getBoolean(quot;
Extranjeroquot;
));<br /> } catch (Exception ex) {<br /> System.err.println(quot;
Error en registro:quot;
+ ex.getMessage());<br /> }<br /> }<br /> public static void main(String args[]) {<br /> java.awt.EventQueue.invokeLater(new Runnable() {<br /> public void run() {<br /> new Viscli().setVisible(true);<br /> }<br /> });<br /> }<br />VISUALIZAR CLIENTES (DRIVER NATIVO)<br />--------------------------------------------------------------<br />package alfa;<br />import java.sql.Connection;<br />import java.sql.DriverManager;<br />import java.sql.ResultSet;<br />import java.sql.Statement;<br />import javax.swing.JOptionPane;<br />public class Viscli extends javax.swing.JFrame {<br /> Connection cn = null; // variable de conexion<br /> Statement st = null; // variable de instruccion SQL<br /> ResultSet rs = null; // variable de registros o filas<br /> public Viscli() {<br /> initComponents();<br /> }<br /> private void formWindowOpened(java.awt.event.WindowEvent evt) { <br /> conexion();<br /> } <br /> private void btnPrimeroActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> rs.first();<br /> mostrar();<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnUltimoActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> rs.last();<br /> mostrar();<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnAnteriorActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> if (rs.isFirst()) {<br /> JOptionPane.showMessageDialog(null, quot;
Inicio de la tablaquot;
);<br /> } else {<br /> rs.previous(); // ir al anterior registro<br /> mostrar();<br /> }<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnSiguienteActionPerformed(java.awt.event.ActionEvent evt) { <br /> try {<br /> if (rs.isLast()) {<br /> JOptionPane.showMessageDialog(null, quot;
Final de la tablaquot;
);<br /> } else {<br /> rs.next();<br /> mostrar();<br /> }<br /> } catch (Exception ex) {<br /> }<br /> } <br /> private void btnSalirActionPerformed(java.awt.event.ActionEvent evt) { <br /> int rsp;<br /> rsp = JOptionPane.showConfirmDialog(null, quot;
Cerrar formularioquot;
,<br /> quot;
Salirquot;
, JOptionPane.YES_NO_OPTION);<br /> if (rsp == JOptionPane.YES_OPTION) {<br /> this.dispose();<br /> }<br /> } <br /> private void conexion() {<br /> try {<br /> String driver = quot;
sun.jdbc.odbc.JdbcOdbcDriverquot;
;<br /> String url = quot;
jdbc:odbc:SQLFacturacionquot;
;<br /> Class.forName(driver);<br /> cn = DriverManager.getConnection(url, quot;
saquot;
, quot;
123quot;
);<br /> st = cn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,<br /> ResultSet.CONCUR_READ_ONLY);<br /> rs = st.executeQuery(quot;
Select * from Clientesquot;
);<br /> rs.next();<br /> mostrar();<br /> } catch (Exception ex) {<br /> System.err.println(quot;
Error en conexion:quot;
+ ex.getMessage());<br /> }<br /> }<br /> private void mostrar() {<br /> try {<br /> txtCodcli.setText(rs.getString(quot;
cod_cliquot;
));<br /> txtCliente.setText(rs.getString(quot;
clientequot;
));<br /> txtDireccion.setText(rs.getString(quot;
direccionquot;
));<br /> txtLcredito.setText(String.valueOf(rs.getFloat(quot;
Lcreditoquot;
)));<br /> chkExtranjero.setSelected(rs.getBoolean(quot;
Extranjeroquot;
));<br /> } catch (Exception ex) {<br /> System.err.println(quot;
Error en registro:quot;
+ ex.getMessage());<br /> }<br /> }<br /> public static void main(String args[]) {<br /> java.awt.EventQueue.invokeLater(new Runnable() {<br /> public void run() {<br /> new Viscli().setVisible(true);<br /> }<br /> });<br /> }<br />