Altas, Bajas y Modificaciones de Registros en tabla MYSQL

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1 Altas, Bajas y Modificaciones de Registros en tabla MYSQL 1. En MySql crear una base de datos de nombre EmpresaABC y dentro de ella la tabla Empleados con la siguiente estructura: DNI integer(8) Definir Indice Primary AYN char (40) DOMICILIO char (40) TELEFONO integer(10) 2. Crear un proyecto Java de nombre ABMEmpleados (recordar agregar MySql-connector Ver Cartilla). 3. Dentro de este proyecto agregar dos nuevos programas basados en JFrame con WindowsBuilder. El primer programa será AltaEmpleados.java y el segundo, BajaModifEmpleado.java CODIGO AltaEmpleados. import java.awt.eventqueue; import javax.swing.jframe; import javax.swing.jpanel; import javax.swing.border.emptyborder; import javax.swing.jlabel; import javax.swing.jtextfield; import javax.swing.jbutton; import java.awt.event.actionlistener; import java.awt.event.actionevent; import java.sql.connection; import java.sql.drivermanager; import java.sql.resultset; import java.sql.sqlexception; import java.sql.statement; import java.awt.color; import java.awt.font; import java.awt.component; public class AltaEmpleados extends JFrame { private JPanel contentpane; private JTextField tf2; private JTextField tf3; private JLabel labelresultado; private JTextField tf1; private JTextField tf4; /** * Launch the application. */ public static void main(string[] args) { EventQueue.invokeLater(new Runnable() { public void run() { AltaEmpleados frame = new AltaEmpleados(); frame.setvisible(true); catch (Exception e) { e.printstacktrace();

2 ); /** * Create the frame. */ public AltaEmpleados() { getcontentpane().setlayout(null); setdefaultcloseoperation(jframe.exit_on_close); setbounds(100, 50, 606, 405); contentpane = new JPanel(); contentpane.setborder(new EmptyBorder(5, 5, 5, 5)); setcontentpane(contentpane); contentpane.setlayout(null); settitle("alta de Empleados"); JLabel lbldni = new JLabel("DNI:"); lbldni.setbounds(23, 42, 89, 14); contentpane.add(lbldni); tf1 = new JTextField(); tf1.setcolumns(10); tf1.setbounds(128, 42, 140, 20); contentpane.add(tf1); JLabel lbldescripcindelartculo = new JLabel("Apellido y Nombres:"); lbldescripcindelartculo.setbounds(23, 73, 95, 14); contentpane.add(lbldescripcindelartculo); tf2 = new JTextField(); tf2.setbounds(128, 73, 250, 20); contentpane.add(tf2); tf2.setcolumns(30); JLabel lblprecio = new JLabel("Domicilio:"); lblprecio.setbounds(23, 101, 95, 14); contentpane.add(lblprecio); tf3 = new JTextField(); tf3.setbounds(128, 101, 250, 20); contentpane.add(tf3); tf3.setcolumns(30); JLabel lbltelfono = new JLabel("Tel\u00E9fono:"); lbltelfono.setbounds(23, 130, 89, 14); contentpane.add(lbltelfono); tf4 = new JTextField(); tf4.setcolumns(20); tf4.setbounds(128, 130, 140, 20); contentpane.add(tf4);

3 JButton btnalta = new JButton("Guardar"); btnalta.addactionlistener(new ActionListener() { public void actionperformed(actionevent arg0) { labelresultado.settext(""); Connection conexion=drivermanager.getconnection("jdbc:mysql://localhost/empresaabc","root",""); Statement comando1=conexion.createstatement(); ResultSet registro = comando1.executequery("select * from empleados where dni="+tf1.gettext()); if (registro.next()==true) { // la condicion indica que el dni existe labelresultado.settext("ya existe el DNI!"); else { Statement comando2=conexion.createstatement(); comando2.executeupdate("insert into empleados (dni, ayn, domicilio, telefono) values ("+ tf1.gettext()+",'"+tf2.gettext()+"','"+tf3.gettext()+"',"+tf4.gettext()+")"); ); labelresultado.settext("se registraron los datos"); tf1.settext(""); tf2.settext(""); tf3.settext(""); tf4.settext(""); conexion.close(); catch(sqlexception ex){ btnalta.setbounds(128, 180, 89, 23); contentpane.add(btnalta); labelresultado = new JLabel("resultado"); labelresultado.setfont(new Font("Arial", Font.BOLD, 11)); labelresultado.setforeground(color.red); labelresultado.setbounds(272, 184, 229, 14); contentpane.add(labelresultado); cargardriver(); private void cargardriver() { Class.forName("com.mysql.jdbc.Driver"); catch(exception ex) {

4 CODIGO BajaModifEmpleados. import java.awt.eventqueue; import javax.swing.jframe; import javax.swing.jpanel; import javax.swing.border.emptyborder; import javax.swing.jlabel; import javax.swing.jtextfield; import javax.swing.jbutton; import java.awt.event.actionlistener; import java.awt.event.actionevent; import java.sql.connection; import java.sql.drivermanager; import java.sql.resultset; import java.sql.sqlexception; import java.sql.statement; import java.awt.color; import java.awt.font; public class BajaModifEmpleado extends JFrame { private JPanel contentpane; private JTextField tf2; private JTextField tf3; private JLabel labelresultado; private JTextField tf1; private JTextField tf4; private JButton btnborrar, btnmodificar, btnbuscar; /** * Launch the application. */ public static void main(string[] args) { EventQueue.invokeLater(new Runnable() { public void run() { BajaModifEmpleado frame = new BajaModifEmpleado(); frame.setvisible(true); catch (Exception e) { e.printstacktrace(); ); /**

5 * Create the frame. */ public BajaModifEmpleado() { getcontentpane().setlayout(null); setdefaultcloseoperation(jframe.exit_on_close); setbounds(100, 50, 606, 405); contentpane = new JPanel(); contentpane.setborder(new EmptyBorder(5, 5, 5, 5)); setcontentpane(contentpane); contentpane.setlayout(null); settitle("baja Modificacion de Empleados"); JLabel lbldni = new JLabel("DNI:"); lbldni.setbounds(23, 42, 89, 14); contentpane.add(lbldni); tf1 = new JTextField(); tf1.setcolumns(10); tf1.setbounds(128, 42, 140, 20); contentpane.add(tf1); JLabel lbldescripcindelartculo = new JLabel("Apellido y Nombres:"); lbldescripcindelartculo.setbounds(23, 73, 95, 14); contentpane.add(lbldescripcindelartculo); tf2 = new JTextField(); tf2.setbounds(128, 73, 250, 20); contentpane.add(tf2); tf2.setcolumns(30); JLabel lblprecio = new JLabel("Domicilio:"); lblprecio.setbounds(23, 101, 95, 14); contentpane.add(lblprecio); tf3 = new JTextField(); tf3.setbounds(128, 101, 250, 20); contentpane.add(tf3); tf3.setcolumns(30); JLabel lbltelfono = new JLabel("Tel\u00E9fono:"); lbltelfono.setbounds(23, 130, 89, 14); contentpane.add(lbltelfono); tf4 = new JTextField(); tf4.setcolumns(20); tf4.setbounds(128, 130, 140, 20); contentpane.add(tf4); labelresultado = new JLabel("resultado"); labelresultado.setfont(new Font("Arial", Font.BOLD, 11)); labelresultado.setforeground(color.red);

6 labelresultado.setbounds(130, 172, 229, 14); contentpane.add(labelresultado); btnborrar = new JButton("Borrar"); btnborrar.addactionlistener(new ActionListener() { public void actionperformed(actionevent arg0) { labelresultado.settext(""); Connection conexion=drivermanager.getconnection("jdbc:mysql://localhost/empresaabc","root",""); Statement comando=conexion.createstatement(); int cantidad = comando.executeupdate("delete from empleados where dni="+tf1.gettext()); if (cantidad==1) { tf1.settext(""); tf2.settext(""); tf3.settext(""); tf4.settext(""); labelresultado.settext("se borro el empleado"); else { labelresultado.settext("no existe el DNI"); conexion.close(); catch(sqlexception ex){ ); btnborrar.setbounds(23, 214, 133, 23); contentpane.add(btnborrar); btnborrar.setenabled(false); //... btnmodificar = new JButton("Modificar"); btnmodificar.addactionlistener(new ActionListener() { public void actionperformed(actionevent e) { labelresultado.settext(""); Connection conexion=drivermanager.getconnection("jdbc:mysql://localhost/empresaabc","root",""); Statement comando=conexion.createstatement(); int cantidad = comando.executeupdate("update empleados set ayn='" + tf2.gettext() + "'," + "domicilio= '" + tf3.gettext() + "'," + "telefono=" + tf4.gettext() + " where dni="+tf1.gettext()); if (cantidad==1) {

7 labelresultado.settext("se modifico el registro del empleado"); else { labelresultado.settext("no existe el DNI"); conexion.close(); catch(sqlexception ex){ ); btnmodificar.setbounds(166, 214, 140, 23); contentpane.add(btnmodificar); btnmodificar.setenabled(false); //... JButton btnbuscar = new JButton("Buscar"); btnbuscar.addactionlistener(new ActionListener() { public void actionperformed(actionevent arg0) { labelresultado.settext(""); Connection conexion=drivermanager.getconnection("jdbc:mysql://localhost/empresaabc","root",""); Statement comando1=conexion.createstatement(); tf2.settext(""); tf3.settext(""); tf4.settext(""); ResultSet registro = comando1.executequery("select * from empleados where dni="+tf1.gettext()); if (registro.next()==false) { // la condicion indica que el dni NO existe labelresultado.settext("el DNI No EXISTE!"); else { labelresultado.settext("el DNI EXISTE..."); tf2.settext(registro.getstring("ayn")); tf3.settext(registro.getstring("domicilio")); tf4.settext(registro.getstring("telefono")); btnborrar.setenabled(true); btnmodificar.setenabled(true); conexion.close(); catch(sqlexception ex){

8 ); btnbuscar.setbounds(289, 38, 89, 23); contentpane.add(btnbuscar); cargardriver(); private void cargardriver() { Class.forName("com.mysql.jdbc.Driver"); catch(exception ex) {

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