银行取款转账系统（Java编写）

package com.gujunjia.bank; /* * To change this template, choose Tools | Templates * and open the template in the editor. */ import java.awt.event.*; import javax.swing.*; import java.awt.*; import javax.swing.border.LineBorder; /** * * @author gujunjia */ public class UserGUI extends JFrame implements ActionListener { /** * */ private static final long serialVersionUID = 1L; public static String myUserId;// 记录登录用户的ID JButton depositButton; JButton selectButton; JButton transferButton; JTextArea resultArea; /** * 构造方法 */ public UserGUI() { UserGUI.myUserId = MainFrame.userId; Bank bank = new Bank(); String name = bank.getUserName(myUserId); this.setTitle(name + "的个人银行"); this.setSize(350, 400); this.setLocation(getMidDimension(new Dimension(350, 400))); getApperance(); this.setVisible(true); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public Container getApperance() { Container container = this.getContentPane(); container.setLayout(new GridLayout(0, 2)); JPanel jp1 = new JPanel(new BorderLayout()); JLabel jl1 = new JLabel("功能区："); jl1.setFont(new Font("楷体", Font.BOLD, 20)); jp1.add(jl1, BorderLayout.NORTH); JPanel jp2 = new JPanel(new GridLayout(3, 0)); depositButton = new JButton("存款"); depositButton.addActionListener(this); depositButton.setFont(new Font("宋体", Font.BOLD, 30)); selectButton = new JButton("查询"); selectButton.addActionListener(this); selectButton.setFont(new Font("宋体", Font.BOLD, 30)); transferButton = new JButton("转账"); transferButton.addActionListener(this); transferButton.setFont(new Font("宋体", Font.BOLD, 30)); JPanel jp3 = new JPanel(); JPanel jp4 = new JPanel(); JPanel jp5 = new JPanel(); jp3.add(depositButton); jp4.add(selectButton); jp5.add(transferButton); jp2.add(jp3); jp2.add(jp4); jp2.add(jp5); jp1.add(jp2, BorderLayout.CENTER); container.add(jp1); JLabel jl2 = new JLabel("显示结果："); jl2.setFont(new Font("楷体", Font.BOLD, 20)); resultArea = new JTextArea(); resultArea.setBorder(new LineBorder(Color.BLUE)); resultArea.setLineWrap(true); JPanel jp6 = new JPanel(new BorderLayout()); jp6.add(jl2, BorderLayout.NORTH); jp6.add(resultArea, BorderLayout.CENTER); container.add(jp6); return container; } /** * 获取屏幕的中间尺寸 * * @param d * Dimension类型 * @return 一个Point类型的参数 */ public static Point getMidDimension(Dimension d) { Point p = new Point(); Dimension dim = Toolkit.getDefaultToolkit().getScreenSize(); p.setLocation((dim.width - d.width) / 2, (dim.height - d.height) / 2); return p; } public void deposit() { final JFrame frame = new JFrame("存款"); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); frame.setLayout(new GridLayout(2, 0)); frame.setSize(300, 200); frame.setLocation(getMidDimension(new Dimension(300, 200))); JLabel jl = new JLabel("请输入存款金额："); jl.setFont(new Font("宋体", Font.PLAIN, 15)); JPanel jp1 = new JPanel(); jp1.add(jl); final JTextField text = new JTextField(10); jp1.add(text); frame.add(jp1); JButton enter = new JButton("确定"); enter.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { Bank bank = new Bank(); if (!text.getText().equals("")) { double money = Double.valueOf(text.getText().trim()); bank.deposit(myUserId, money); JOptionPane.showMessageDialog(null, "存款成功"); String name = bank.getUserName(myUserId); String message = name + "用户您好：" + "\n" + "您的账户余额为：" + bank.getRemainingSum(myUserId); resultArea.setText(message); frame.dispose(); } else { JOptionPane.showMessageDialog(null, "请输入存款金额"); } } }); JButton cancel = new JButton("取消"); cancel.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { frame.dispose(); } }); JPanel jp2 = new JPanel(); jp2.add(enter); jp2.add(cancel); frame.add(jp2); } public void select() { Bank bank = new Bank(); String name = bank.getUserName(myUserId); double money = bank.getRemainingSum(myUserId); resultArea.setText(name + "用户您好：" + "\n" + "您的账户余额为：" + money); } public void transfer() { final JFrame frame = new JFrame("转账"); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); frame.setLayout(new GridLayout(4, 0)); frame.setSize(300, 300); frame.setLocation(getMidDimension(new Dimension(300, 300))); JLabel jl1 = new JLabel("对方账号："); jl1.setFont(new Font("宋体", Font.PLAIN, 15)); final JTextField idField = new JTextField(15); final JLabel jll = new JLabel();// 显示对方用户姓名 idField.addFocusListener(new FocusListener() { @Override public void focusGained(FocusEvent e) { } @Override public void focusLost(FocusEvent e) { Bank bank = new Bank(); if (bank.isExist(idField.getText().trim())) { String name = bank.getUserName(idField.getText().trim()); jll.setText("对方用户名：" + name); jll.setFont(new Font("宋体", Font.BOLD, 20)); } else { JOptionPane.showMessageDialog(null, "对方账号不存在，请重新输入"); idField.setText(""); } } }); JPanel jp1 = new JPanel(); jp1.add(jl1); jp1.add(idField); frame.add(jp1); JPanel jpp = new JPanel(); jpp.add(jll); frame.add(jpp); JLabel jl2 = new JLabel("转账金额："); jl2.setFont(new Font("宋体", Font.PLAIN, 15)); final JTextField moneyField = new JTextField(15); JPanel jp2 = new JPanel(); jp2.add(jl2); jp2.add(moneyField); frame.add(jp2); JButton enter = new JButton("确定"); enter.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (idField.getText().equals("") || moneyField.getText().equals("")) { JOptionPane.showMessageDialog(null, "请输入对方账号和金额"); } else { String desId = idField.getText().trim(); Bank bank = new Bank(); double remainMoney = bank.getRemainingSum(myUserId); double money = Double.valueOf(moneyField.getText().trim()); if (money > remainMoney) { JOptionPane.showMessageDialog(null, "对不起您的余额不足，不能转账！", "警告", JOptionPane.ERROR_MESSAGE); moneyField.setText(""); } else { bank.transfer(myUserId, money, desId); remainMoney = bank.getRemainingSum(myUserId); JOptionPane.showMessageDialog(null, "转账成功"); String name = bank.getUserName(myUserId); String message = name + "用户您好，您已成功转出" + money + "元" + "\n" + "您的账户余额为：" + remainMoney; resultArea.setText(message); frame.dispose(); } } } }); JButton cancel = new JButton("取消"); cancel.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { frame.dispose(); } }); JPanel jp3 = new JPanel(); jp3.add(enter); jp3.add(cancel); frame.add(jp3); } public void actionPerformed(ActionEvent e) { Object btn = e.getSource(); if (btn == depositButton) { deposit(); } else if (btn == selectButton) { select(); } else if (btn == transferButton) { transfer(); } } }