Olá Pessoal;
estou querendo cria um Applet que conecta ao MySQL, estou usando o JCreator
Pro, copilo é funciona bem pelo appletviewer cosultando bem a tabela do
MySQL. Só que quando vou rodar o applet via HTML eu clico no botão de Busca
para consultar a tabela não funciona. Já experimentei colocar o drive
mysql-connector-java-5.0.4-bin.jar na mesma pasta que se encotra a classe
mas não adiantou. Alguma dica que possa me ajudar ?
segue abaixo o codigo;
Gratro,
Carlos Geiser.
import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JApplet;
import javax.swing.JLabel;
import java.awt.Rectangle;
import java.awt.Font;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DecimalFormat;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class Cadastro extends JApplet {
public int codigo;
Connection con = getConnection();
String q = “”;
String qtd = “”;
private JPanel jContentPane = null;
private JLabel jLabel = null;
private JLabel jLabel1 = null;
private JLabel jLabel11 = null;
private JTextField jTextFieldCodigo = null;
private JTextField jTextFieldCurso = null;
private JButton jButton = null;
private JButton jButton1 = null;
private JButton jButton2 = null;
private JButton jButton3 = null;
private JLabel jLabel111 = null;
private JTextField jTextFieldPreco = null;
private JTextField jTextFieldStatus = null;
/**
- This is the xxx default constructor
*/
public Cadastro() {
super();
}
/**
- This method initializes this
-
@return void
*/
public void init() {
this.setSize(500, 400);
this.setContentPane(getJContentPane());
}
/**
- This method initializes jContentPane
-
@return javax.swing.JPanel
*/
public static Connection getConnection() {
Connection con = null;
// System.out.println("-----------------------------");
try{
Class.forName(“com.mysql.jdbc.Driver”).newInstance();
String url = “jdbc:mysql://127.0.0.1/loja?user=root&password=123456”;
con = DriverManager.getConnection(url);
//System.out.println("******************");
}
catch (SQLException ae) {
// status = ae.getMessage();
}
catch (ClassNotFoundException ae) {
// status = ae.getMessage();
}
catch (Exception e) {
// status = ae.getMessage();
}
return con;
}
private JPanel getJContentPane() {
if (jContentPane == null) {
jLabel111 = new JLabel();
jLabel111.setBounds(new Rectangle(32, 177, 90, 16));
jLabel111.setText(“Preço”);
jLabel11 = new JLabel();
jLabel11.setBounds(new Rectangle(32, 137, 90, 16));
jLabel11.setText(“Nome:”);
jLabel1 = new JLabel();
jLabel1.setBounds(new Rectangle(32, 102, 90, 16));
jLabel1.setText(“Código:”);
jLabel = new JLabel();
jLabel.setBounds(new Rectangle(111, 18, 472, 39));
jLabel.setFont(new Font(“Dialog”, Font.BOLD, 24));
jLabel.setText("[!CADASTRO DE CURSO-]");
jContentPane = new JPanel();
jContentPane.setLayout(null);
jContentPane.add(jLabel, null);
jContentPane.add(jLabel1, null);
jContentPane.add(jLabel11, null);
jContentPane.add(getJTextFieldCodigo(), null);
jContentPane.add(getJTextFieldCurso(), null);
jContentPane.add(getJButton(), null);
jContentPane.add(getJButton1(), null);
jContentPane.add(getJButton2(), null);
jContentPane.add(getJButton3(), null);
jContentPane.add(jLabel111, null);
jContentPane.add(getJTextFieldPreco(), null);
jContentPane.add(getJTextFieldStatus(), null);
}
return jContentPane;
}
/**
- This method initializes jTextFieldCodigo
-
@return javax.swing.JTextField
*/
private JTextField getJTextFieldCodigo() {
if (jTextFieldCodigo == null) {
jTextFieldCodigo = new JTextField();
jTextFieldCodigo.setBounds(new Rectangle(126, 100, 90, 20));
}
return jTextFieldCodigo;
}
/**
- This method initializes jTextFieldCurso
-
@return javax.swing.JTextField
*/
private JTextField getJTextFieldCurso() {
if (jTextFieldCurso == null) {
jTextFieldCurso = new JTextField();
jTextFieldCurso.setBounds(new Rectangle(126, 136, 200, 20));
}
return jTextFieldCurso;
}
/**
- This method initializes jButton
-
@return javax.swing.JButton
*/
private JButton getJButton() {
if (jButton == null) {
jButton = new JButton();
jButton.setBounds(new Rectangle(55, 233, 126, 25));
jButton.setText(“Alterar”);
}
return jButton;
}
/**
- This method initializes jButton1
-
@return javax.swing.JButton
*/
private JButton getJButton1() {
if (jButton1 == null) {
jButton1 = new JButton();
jButton1.setBounds(new Rectangle(187, 233, 126, 25));
jButton1.setText(“Incluir”);
jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
});
}
return jButton1;
}
/**
- This method initializes jButton2
-
@return javax.swing.JButton
*/
private JButton getJButton2() {
if (jButton2 == null) {
jButton2 = new JButton();
jButton2.setBounds(new Rectangle(319, 233, 126, 25));
jButton2.setText(“Excluir”);
jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent e) {
jTextFieldStatus.setText("O curso .......");
}
}
);
}
return jButton2;
}
/**
-
This method initializes jButton3
-
@return javax.swing.JButton */ private JButton getJButton3() { if (jButton3 == null) { jButton3 = new JButton(); jButton3.setBounds(new Rectangle(337, 97, 128, 25)); jButton3.setText(“Buscar”); jButton3.addMouseListener(new java.awt.event.MouseAdapter() { public void mouseClicked(java.awt.event.MouseEvent e) {
jTextFieldStatus.setText(“O curso :”);try{
jTextFieldStatus.setText("Mensagem do sistema…: ");Statement st = con.createStatement(); q = " select * from loja.cursos where codigo = " + jTextFieldCodigo.getText() ; ResultSet rs = st.executeQuery(q);
while (rs.next()) { String codigo = rs.getString(“codigo”); String curso = rs.getString(“curso”); String preco = rs.getString(“preco”); // System.out.println(“Codigo:”+codigo +" Nome dO curso : “+ curso +” Preço:"+ preco);
jTextFieldCurso.setText(curso); jTextFieldPreco.setText(preco); jTextFieldStatus.setText("O curso : "+jTextFieldCodigo.getText()+"
foi localizado com sucesso com sucesso");
}
}catch (SQLException ae) {
jTextFieldStatus.setText("Mensagem do sistema...: "+ae.getMessage());
// System.out.println("Mensagem do sistema...: "+ae.getMessage());
}
}
}
);
}
return jButton3;
}
/**
- This method initializes jTextFieldPreco
-
@return javax.swing.JTextField
*/
private JTextField getJTextFieldPreco() {
if (jTextFieldPreco == null) {
jTextFieldPreco = new JTextField();
jTextFieldPreco.setBounds(new Rectangle(126, 175, 84, 20));
}
return jTextFieldPreco;
}
/**
- This method initializes jTextFieldStatus
-
@return javax.swing.JTextField
*/
private JTextField getJTextFieldStatus() {
if (jTextFieldStatus == null) {
jTextFieldStatus = new JTextField();
jTextFieldStatus.setBounds(new Rectangle(21, 275, 464, 20));
}
return jTextFieldStatus;
}
}
