cxfrm.java

ATM系统分为前台和后台

package atm;

//import javax.swing.SwingUtilities;
import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import java.awt.GridBagLayout;
import javax.swing.JLabel;
import java.awt.GridBagConstraints;
import java.sql.ResultSet;
import java.sql.SQLException;
import oo.Sql;
import java.sql.*;
import javax.swing.JTextField;
import javax.swing.JButton;

public class CXFrm extends JFrame {                //查询窗口

	private static final long serialVersionUID = 1L;

	private JPanel jContentPane = null;

	private JPanel jPanel = null;

	private JLabel jLabel = null;

	private JTextField jTextField = null;

	private JButton jButton1 = null;

	/**
	 * This method initializes jPanel	
	 * 	
	 * @return javax.swing.JPanel	
	 */
	private JPanel getJPanel() {
		if (jPanel == null) {
			GridBagConstraints gridBagConstraints5 = new GridBagConstraints();
			gridBagConstraints5.gridx = 1;
			gridBagConstraints5.gridy = 2;
			GridBagConstraints gridBagConstraints1 = new GridBagConstraints();
			gridBagConstraints1.fill = GridBagConstraints.VERTICAL;
			gridBagConstraints1.gridy = 0;
			gridBagConstraints1.weightx = 1.0;
			gridBagConstraints1.gridx = 1;
			GridBagConstraints gridBagConstraints = new GridBagConstraints();
			gridBagConstraints.gridx = 0;
			gridBagConstraints.gridy = 0;
			jLabel = new JLabel();
			jLabel.setText("当前总金额：");
			jPanel = new JPanel();
			jPanel.setLayout(new GridBagLayout());
			jPanel.add(jLabel, gridBagConstraints);
			jPanel.add(getJTextField(), gridBagConstraints1);
			jPanel.add(getJButton1(), gridBagConstraints5);
		}
		return jPanel;
	}

	/**
	 * This method initializes jTextField	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	private JTextField getJTextField() {
		if (jTextField == null) {
			jTextField = new JTextField();
			jTextField.setColumns(8);
		}
		return jTextField;
	}

	/**
	 * This method initializes jButton1	
	 * 	
	 * @return javax.swing.JButton	
	 */
	public void close(){
		(new UMFrm()).setVisible(true);
		this.setVisible(false);
	}
	private JButton getJButton1() {
		if (jButton1 == null) {
			jButton1 = new JButton();
			jButton1.setText("返回");
			jButton1.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					System.out.println("actionPerformed()"); // TODO Auto-generated Event stub actionPerformed()
				close();
				}
			});
		}
		return jButton1;
	}

	/**
	 * @param args
	 */
	/*public static void main(String[] args) {
		// TODO 自动生成方法存根
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				CXFrm thisClass = new CXFrm();
				thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				thisClass.setVisible(true);
			}
		});
	}

	/**
	 * This is the default constructor
	 */
	public CXFrm() {
		super();
		initialize();
	}

	/**
	 * This method initializes this
	 * 
	 * @return void
	 */

	private void initialize() {
		this.setSize(250, 200);
		this.setContentPane(getJContentPane());
		this.setTitle("用户查询窗");
		yu();
	}
	Sql db=new Sql();  //  @jve:decl-index=0:
	Connection con;  //  @jve:decl-index=0:
	ResultSet rs;
	Statement st;
	public void yu(){
		con=db.getConn();
		try{
			
			st=con.createStatement();
			String sql="select * from cardInfo where cardID='"+UserFrm.cardID+"'";
			ResultSet rs=db.executeQuery(sql);
			//javax.swing.JOptionPane.showMessageDialog(null,"该用户余额为"+rs.getString("balance")+"");
			if(rs.next()){
				jTextField.setText(rs.getString("balance"));
				jTextField.setEnabled(false);
			}
		}catch(SQLException ee){
			ee.printStackTrace();
		}
	}
	/**
	 * This method initializes jContentPane
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jContentPane = new JPanel();
			jContentPane.setLayout(new BorderLayout());
			jContentPane.add(getJPanel(), BorderLayout.CENTER);
		}
		return jContentPane;
	}

}  //  @jve:decl-index=0:visual-constraint="24,-8"