java模仿实现QQ登录界面

 import java.awt.BorderLayout; import java.awt.Color; import java.awt.FlowLayout; import java.awt.GridLayout; import java.awt.Image; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Arrays; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Set; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JPasswordField; import javax.swing.JTextField; public class QQ2015 extends JFrame implements ActionListener { JFrame loginFrame; // 复选框 private JCheckBox jc1; private JCheckBox jc2; // 用户名 private JTextField username; // 密码 private JPasswordField password; // 错误消息提示 JLabel mes; // 创建一个HashMap，用以保存帐号和密码 HashMap users = new HashMap(); // 主函数入口 public static void main(String[] args) { QQ2015 qq2015 = new QQ2015(); qq2015.showLoginFrame(); } // 构造方法 public QQ2015() { users.put("123456", "123456"); users.put("302795036", "123456"); users.put("123", "123456"); } // 创建登陆界面方法 public void showLoginFrame() { loginFrame = new JFrame(); // 设置大小，位置，标题 loginFrame.setSize(410, 380); loginFrame.setTitle("修衡-QQ2015"); loginFrame.setLocationRelativeTo(null); // 创建边界布局对象 loginFrame.setLayout(new BorderLayout()); JPanel panelTop = new JPanel(new FlowLayout()); JPanel panelCenter = new JPanel(new GridLayout(3, 1)); JPanel panelFooter = new JPanel(new GridLayout(2, 1)); JPanel panelFooter1 = new JPanel(new FlowLayout()); JPanel panelFooter2 = new JPanel(new FlowLayout()); panelFooter.add(panelFooter1); panelFooter.add(panelFooter2); JPanel panelLeft = new JPanel(new GridLayout(1, 1)); JPanel panelRight = new JPanel(new GridLayout(3, 1)); loginFrame.add("North", panelTop); loginFrame.add("Center", panelCenter); loginFrame.add("South", panelFooter); loginFrame.add("West", panelLeft); loginFrame.add("East", panelRight); (new BorderLayout()).setHgap(50); // 插入图片 Image im = new ImageIcon("imgs/qq.png-600").getImage(); im = im.getScaledInstance(-1, 90, DO_NOTHING_ON_CLOSE); loginFrame.setIconImage(im); JLabel tl = new JLabel(new ImageIcon("imgs/top.png-600")); panelTop.add(tl); // 可以设置panelTop背景颜色 // panelTop.setBackground(Color.YELLOW); JLabel ll = new JLabel(new ImageIcon("imgs/left.png-600")); panelLeft.add(ll); // 创建注册账号和找回密码标签 JLabel reg_name = new JLabel(" 注册账号 "); JLabel find_password = new JLabel(" 找回密码 "); reg_name.setForeground(Color.BLUE); find_password.setForeground(Color.BLUE); // 创建帐号和密码输入框 username = new JTextField(18); password = new JPasswordField(18); // 复选框 jc1 = new JCheckBox("记住密码 "); jc2 = new JCheckBox("自动登录"); JLabel nul1 = new JLabel(" "); JLabel nul2 = new JLabel(" "); // 错误消息提示标签 mes = new JLabel(); mes.setForeground(Color.RED); // 部分布局 JPanel pancener = new JPanel(new FlowLayout()); pancener.add(jc1); pancener.add(nul1); pancener.add(jc2); // 创建登陆，重置按钮 JButton button_reset = new JButton(" 重 置 "); JButton button_login = new JButton(" 登 陆 "); button_login.setBackground(Color.pink); // 窗体大小不能改变 loginFrame.setResizable(false); // 设置窗体可见 loginFrame.setVisible(true); // 将文本输入框，按钮，事件监听对象等添加 panelCenter.add(username); panelCenter.add(password); panelCenter.add(pancener); panelRight.add(reg_name); panelRight.add(find_password); panelFooter1.add(button_reset); panelFooter1.add(nul2); panelFooter1.add(button_login); panelFooter2.add(mes); button_reset.addActionListener(this); button_login.addActionListener(this); // reg_name.addActionListener(this); } public void actionPerformed(ActionEvent e) { String str = e.getActionCommand(); boolean f = false; String pw = null; // 重置事件 if (str.equals(" 重 置 ")) { username.setText(""); password.setText(""); mes.setText(""); } // 登录事件 if (str.equals(" 登 陆 ")) { mes.setText(""); Set> set = users.entrySet(); for (Map.Entry me : set) { if (username.getText().trim().equals(me.getKey())) { f = true; pw = me.getValue(); break; } } if (f) { // if (password.getPassword().equals(pw)) { if (password.getText().trim().equals(pw)) { JOptionPane.showMessageDialog(null, "登录成功"); } else { mes.setText("温馨提示:密码为空或错误,请重新输入！"); } } else { mes.setText("温馨提示:帐号为空或错误,请重新输入！"); } } } }