1. VISUALIZAR REGISTROS (BD. NORTHWIND) EN UN JTABLE (NETBEANS – SQL SERVER)<br />CONSULTA<br />select P.ProductID, <br />P.ProductName, <br />C.CategoryName, <br />S.CompanyName, <br />P.UnitPrice, <br />P.UnitsInStock, <br />P.QuantityPerUnit<br />from Products P inner join Categories C <br />on P.CategoryID = C.CategoryID <br /> inner join Suppliers S<br /> on P.SupplierID = S.SupplierID<br />ConnectionManager<br />package examen;<br />import java.sql.Connection;<br />import java.sql.DriverManager;<br />import java.sql.SQLException;<br />public class ConnectionManager {<br /> final private static String DRIVER = quot;
com.microsoft.sqlserver.jdbc.SQLServerDriverquot;
;<br /> final private static String URL = quot;
jdbc:sqlserver://localhost:1433;DatabaseName=Northwindquot;
;<br /> final private static String USER = quot;
saquot;
;<br /> final private static String PASSWORD = quot;
123quot;
;<br /> private static Connection cn = null;<br /> private ConnectionManager() {<br /> }<br /> public static Connection getConnection()<br /> throws ClassNotFoundException,<br /> SQLException,<br /> Exception {<br /> if (cn == null) {<br /> try {<br /> Class.forName(DRIVER).newInstance();<br /> cn = DriverManager.getConnection(URL, USER, PASSWORD);<br /> } catch (ClassNotFoundException ex) {<br /> throw ex;<br /> } catch (SQLException ex) {<br /> throw ex;<br /> } catch (Exception ex) {<br /> throw ex;<br /> }<br /> }<br /> return cn;<br /> }<br />}<br />Producto<br />package examen;<br />import java.io.Serializable;<br />public class Producto implements Serializable {<br /> private int ProductId;<br /> private String ProductName;<br /> private String CategoryName;<br /> private String CompanyName;<br /> private double UnitPrice;<br /> private int UnitStock;<br /> private String UnidadMedidad;<br /> public Producto() {<br /> }<br /> public Producto(int ProductId, String ProductName, String CategoryName, String CompanyName, double UnitPrice, int UnitStock, String UnidadMedidad) {<br /> this.ProductId = ProductId;<br /> this.ProductName = ProductName;<br /> this.CategoryName = CategoryName;<br /> this.CompanyName = CompanyName;<br /> this.UnitPrice = UnitPrice;<br /> this.UnitStock = UnitStock;<br /> this.UnidadMedidad = UnidadMedidad;<br /> }<br /> public String getCategoryName() {<br /> return CategoryName;<br /> }<br /> public void setCategoryName(String CategoryName) {<br /> this.CategoryName = CategoryName;<br /> }<br /> public String getCompanyName() {<br /> return CompanyName;<br /> }<br /> public void setCompanyName(String CompanyName) {<br /> this.CompanyName = CompanyName;<br /> }<br /> public int getProductId() {<br /> return ProductId;<br /> }<br /> public void setProductId(int ProductId) {<br /> this.ProductId = ProductId;<br /> }<br /> public String getProductName() {<br /> return ProductName;<br /> }<br /> public void setProductName(String ProductName) {<br /> this.ProductName = ProductName;<br /> }<br /> public String getUnidadMedidad() {<br /> return UnidadMedidad;<br /> }<br /> public void setUnidadMedidad(String UnidadMedidad) {<br /> this.UnidadMedidad = UnidadMedidad;<br /> }<br /> public double getUnitPrice() {<br /> return UnitPrice;<br /> }<br /> public void setUnitPrice(double UnitPrice) {<br /> this.UnitPrice = UnitPrice;<br /> }<br /> public int getUnitStock() {<br /> return UnitStock;<br /> }<br /> public void setUnitStock(int UnitStock) {<br /> this.UnitStock = UnitStock;<br /> }<br />}<br />ProductoDAO <br />package examen;<br />import java.sql.CallableStatement;<br />import java.sql.Connection;<br />import java.sql.PreparedStatement;<br />import java.sql.ResultSet;<br />import java.sql.SQLException;<br />import java.sql.Statement;<br />import java.util.ArrayList;<br />public class ProductoDAO {<br /> private Connection cn = null;<br /> private Statement st = null;<br /> private PreparedStatement ps = null;<br /> private CallableStatement cs = null;<br /> private ResultSet rs = null;<br /> public ArrayList<Producto> getProducto() {<br /> ArrayList<Producto> productos =<br /> new ArrayList<Producto>();<br /> final String QUERY = quot;
select p.ProductID , p.ProductName, C.CategoryName, s.CompanyName, p.UnitPrice, p.UnitsInStock, p.QuantityPerUnit from Products p inner join Categories c on p.CategoryID = C.CategoryID inner join Suppliers s on p.SupplierID = s.SupplierID quot;
;<br /> try {<br /> cn = ConnectionManager.getConnection();<br /> st = cn.createStatement();<br /> rs = st.executeQuery(QUERY);<br /> while (rs.next()) {<br /> Producto c = new Producto(<br /> rs.getInt(1),<br /> rs.getString(2),<br /> rs.getString(3),<br /> rs.getString(4),<br /> rs.getDouble(5),<br /> rs.getInt(6),<br /> rs.getString(7));<br /> productos.add(c);<br /> }<br /> } catch (SQLException ex) {<br /> } catch (Exception ex) {<br /> } finally {<br /> try {<br /> if (rs != null) {<br /> rs.close();<br /> }<br /> if (st != null) {<br /> st.close();<br /> }<br /> if (cn != null) {<br /> cn.close();<br /> }<br /> } catch (Exception ex) {<br /> }<br /> }<br /> return productos;<br /> }<br />}<br />CODIGO FUENTE<br />package examen;<br />import java.util.ArrayList;<br />import java.util.Vector;<br />import javax.swing.table.DefaultTableModel;<br />import javax.swing.table.TableColumn;<br />public class FrmConsultaProductos extends javax.swing.JFrame {<br /> private DefaultTableModel dtm;<br /> public FrmConsultaProductos() {<br /> initComponents();<br /> configurartabla();<br /> cargartabla();<br /> }<br />public static void main(String args[]) {<br /> java.awt.EventQueue.invokeLater(new Runnable() {<br /> public void run() {<br /> new FrmConsultaProductos().setVisible(true);<br /> }<br /> });<br /> }<br /> // Variables declaration - do not modify <br /> private javax.swing.JScrollPane jScrollPane1;<br /> private javax.swing.JTable tblProducto;<br /> // End of variables declaration <br /> private void cargartabla() {<br /> ProductoDAO bo = new ProductoDAO();<br /> ArrayList<Producto> productos =<br /> bo.getProducto();<br /> dtm = (DefaultTableModel) tblProducto.getModel();<br /> for (Producto c : productos) {<br /> Vector fila = new Vector();<br /> fila.add(c.getProductId());<br /> fila.add(c.getProductName());<br /> fila.add(c.getCategoryName());<br /> fila.add(c.getCompanyName());<br /> fila.add(c.getUnitPrice());<br /> fila.add(c.getUnitStock());<br /> fila.add(c.getUnidadMedidad());<br /> dtm.addRow(fila);<br /> }<br /> }<br /> private void configurartabla() {<br /> TableColumn column = null;<br /> column = tblProducto.getColumnModel().getColumn(0);<br /> column.setPreferredWidth(2);<br /> column = tblProducto.getColumnModel().getColumn(1);<br /> column.setPreferredWidth(150);<br /> column = tblProducto.getColumnModel().getColumn(2);<br /> column.setPreferredWidth(150);<br /> }<br />}<br />