我是Java新手,正在開發一個項目。我正在嘗試使用Netbeans從MS Access中檢索數據。這一切工作正常,直到我重新安裝我的操作系統。現在,我運行代碼,我得到這個錯誤。您的幫助和建議,將不勝感激找不到數據Java exception
java.sql.SQLException: No data found
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7138)
at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(JdbcOdbc.java:3073)
at sun.jdbc.odbc.JdbcOdbcConnection.initialize(JdbcOdbcConnection.java:323)
at sun.jdbc.odbc.JdbcOdbcDriver.connect(JdbcOdbcDriver.java:174)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at connect.ConnectDB(connect.java:24)
at StaffLogin.formWindowOpened(StaffLogin.java:125)
at StaffLogin.access$000(StaffLogin.java:13)
at StaffLogin$1.windowOpened(StaffLogin.java:47)
at java.awt.Window.processWindowEvent(Window.java:1859)
at javax.swing.JFrame.processWindowEvent(JFrame.java:279)
at java.awt.Window.processEvent(Window.java:1820)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
這是代碼,我已經離開了「生成代碼」和「外觀和感覺」也。請讓我知道是否需要這些。謝謝。
import java.sql.*;
import javax.swing.*;
public class StaffLogin extends javax.swing.JFrame {
Connection conn = null;
ResultSet rs = null;
PreparedStatement pst = null;
/**
* Creates new form StaffLogin
*/
public StaffLogin() {
initComponents();
}
private void formWindowOpened(java.awt.event.WindowEvent evt) {
// TODO add your handling code here:
conn = connect.ConnectDB();
}
private void cmdloginMouseClicked(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
conn = connect.ConnectDB();
String u = txtusername.getText();
String p = txtpassword.getText();
String sql = "SELECT * FROM Staff_Table WHERE Firstname='" + u+"' and Password='"+ p+"'";
try{
pst = conn.prepareStatement(sql);
rs = pst.executeQuery();
if (rs.next()){
JOptionPane.showMessageDialog(null,"Correct Password");
Interface i = new Interface();
i.setVisible(true);
}
else
JOptionPane.showMessageDialog(null,"Invalid Username or Password");
}
catch(Exception e){
JOptionPane.showMessageDialog(null, e);
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new StaffLogin().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton cmdlogin;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JPanel jPanel1;
private javax.swing.JPasswordField txtpassword;
private javax.swing.JTextField txtusername;
// End of variables declaration
}
發佈您的代碼並查看您的數據庫,並確保您的Windows安裝後數據仍然存在。 – apesa 2012-04-17 19:28:21
感謝您的回覆,我已經包含了代碼 – JohnO 2012-04-17 19:33:58
您是否檢查過以確保您的連接是開放的? – ChadNC 2012-04-17 19:45:16