使用Java swing與Oracle 10g創建JDBC連接

Question

我在jdbc連接中收到未知的源錯誤消息：

IDE: java eclipse
Data Base: oracle 10g
code : java swing
DNS name : home
table name : lg (login )

請幫助我擺脫這個錯誤...！ 這是我正在使用的代碼：

package vijay;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.*;
import javax.swing.border.*;
import java.sql.*; 
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;

public class jdbc extends JFrame {
    Connection con=null;
    Statement st=null;

    /**
     * 
     */
    private static final long serialVersionUID = 6517038751742780009L;
    private JPanel contentPane;
    private JTextField textField;
    private JPasswordField passwordField;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    jdbc frame = new jdbc();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public jdbc()throws Exception  {
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
        con = DriverManager.getConnection("jdbc:odbc:home","system","sa");
        st = con.createStatement();
        JOptionPane.showMessageDialog(null, "connected");

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 566, 359);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(new BorderLayout(0, 0));
        setContentPane(contentPane);

        JPanel panel = new JPanel();
        contentPane.add(panel, BorderLayout.CENTER);
        panel.setLayout(null);

        JLabel lblUserName = new JLabel("user name");
        lblUserName.setBounds(144, 89, 70, 14);
        panel.add(lblUserName);

        JLabel lblPassword = new JLabel("password");
        lblPassword.setBounds(144, 142, 46, 14);
        panel.add(lblPassword);

        textField = new JTextField();
        textField.setBounds(248, 86, 86, 20);
        panel.add(textField);
        textField.setColumns(10);

        JButton btnLogin = new JButton("login");
        btnLogin.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String un=textField.getText();
                String pwd=passwordField.getText().trim();
                String str;
                if(un.equals("vijay")&&pwd.equals("123")) {
                    try {
                        str="insert into lg    values('"+un+"','"+pwd+"')";
                        st.executeUpdate(str);
                        JOptionPane.showMessageDialog(null, "record inserted");
                    }
                    catch(Exception e) {
                    }
                }
                else {
                    JOptionPane.showMessageDialog(null, "Wrong Login Details");
                }
            }
        });
        btnLogin.setBounds(144, 209, 89, 23);
        panel.add(btnLogin);
        btnLogin.setMnemonic(KeyEvent.VK_L);

        JButton btnExit = new JButton("Exit");
        btnExit.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                System.exit(0);
            }
        });
        btnExit.setBounds(254, 209, 89, 23);
        panel.add(btnExit);
        btnExit.setMnemonic(KeyEvent.VK_E);

        passwordField = new JPasswordField();
        passwordField.setBounds(247, 142, 86, 20);
        panel.add(passwordField);
    }
}

Answer 1

使用此驅動程序將很難連接到Oracle DB： Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); 。

您應該正在加載oracle驅動程序。

以下是連接到oracle DB的示例：

import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.SQLException;

public class OracleJDBC {

    public static void main(String[] argv) {

        System.out.println("-------- Oracle JDBC Connection Testing ------");

        try {

            Class.forName("oracle.jdbc.driver.OracleDriver");

        } catch (ClassNotFoundException e) {

            System.out.println("Where is your Oracle JDBC Driver?");
            e.printStackTrace();
            return;

        }

        System.out.println("Oracle JDBC Driver Registered!");

        Connection connection = null;

        try {

            connection = DriverManager.getConnection(
                    "jdbc:oracle:thin:@localhost:1521:test", "username",
                    "password");

        } catch (SQLException e) {

            System.out.println("Connection Failed! Check output console");
            e.printStackTrace();
            return;

        }

        if (connection != null) {
            System.out.println("You made it, take control your database now!");
        } else {
            System.out.println("Failed to make connection!");
        }
    }

}

編輯：

從oracle文檔：

建議您從供應商（例如數據庫供應商或數據庫中間件供應商）那里獲得商業JDBC驅動程序。 檢查當前可用的驅動程序列表。 建議僅將JDBC-ODBC Bridge驅動程序用於實驗性使用，或者在沒有其他替代方法時才使用。

您可以在以下位置查看更多詳細信息： http : //docs.oracle.com/javase/1.3/docs/guide/jdbc/getstart/bridge.doc.html

Answer 2

檢查您是否在數據源中創建了DNS？