loginframe.java

里面所含源码是本人平时做程序的一些实例

package loginInterface;

import java.awt.*;
import javax.swing.*;
import data.*;
import java.awt.event.*;
import java.awt.Rectangle;

public class LoginFrame extends JFrame implements ActionListener {
    //初始化部件
    JPanel pnlMain;
    JLabel lblLogin, lblUserName, lblPwd;
    JTextField txtUserName;
    JPasswordField pwdPassword;
    JButton btnLogin, btnCancel;

    //构造函数
    public LoginFrame() {
        try {
            jbInit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void jbInit() throws Exception {
        //取得窗口面板
        pnlMain = (JPanel)this.getContentPane();
        pnlMain.setLayout(null);
        //定义窗口的大小和标题
        this.setSize(new Dimension(350, 300));
        this.setTitle("登录模块");

        //定义标签的标题
        lblLogin = new JLabel("人事管理系统");
        lblLogin.setFont(new Font("黑体", Font.BOLD, 24));
        lblUserName = new JLabel("用户名:");
        txtUserName = new JTextField("");
        lblPwd = new JLabel("密  码:");
        pwdPassword = new JPasswordField("");
        btnLogin = new JButton("登录");
        btnCancel = new JButton("取消");
        Font font = new Font("宋体", Font.PLAIN, 14);
        lblUserName.setFont(font);
        lblUserName.setForeground(Color.blue);
        lblPwd.setFont(font);
        lblPwd.setForeground(Color.blue);
        btnLogin.setFont(font);
        btnLogin.setForeground(Color.blue);
        btnCancel.setFont(font);
        btnCancel.setForeground(Color.blue);
        lblLogin.setForeground(Color.green);

        //设置组件位置
        lblLogin.setBounds(new Rectangle(92, 30, 150, 40));
        lblUserName.setBounds(new Rectangle(67, 103, 81, 16));
        txtUserName.setCaretColor(Color.green);
        txtUserName.setBounds(new Rectangle(137, 102, 132, 22));
        lblPwd.setBounds(new Rectangle(68, 159, 79, 16));
        pwdPassword.setCaretColor(Color.green);
        pwdPassword.setBounds(new Rectangle(138, 156, 132, 22));
        btnLogin.setBackground(Color.cyan);
        btnLogin.setBounds(new Rectangle(29, 213, 109, 25));
        btnCancel.setBackground(Color.cyan);
        btnCancel.setBounds(new Rectangle(201, 214, 109, 25));
        pnlMain.add(lblLogin);
        pnlMain.add(btnCancel);
        pnlMain.add(btnLogin);
        pnlMain.add(txtUserName);
        pnlMain.add(lblUserName);
        pnlMain.add(pwdPassword);
        pnlMain.add(lblPwd);
        btnLogin.addActionListener(this);
        btnCancel.addActionListener(this);
    }

    //按钮执行事件
    public void actionPerformed(ActionEvent ae) {
        if (ae.getSource() == btnLogin) {
            String name = txtUserName.getText().trim();
            String pwd = new String(pwdPassword.getPassword());
            LoginData login = new LoginData();
            boolean check = login.checkUser(name, pwd);
            //显示提示信息
            if (check) {
                JOptionPane.showMessageDialog(null, "登录成功");
            } else {
                JOptionPane.showMessageDialog(null, "用户名或密码错误!");
            }
        }
        if (ae.getSource().equals(btnCancel)) {
            //清空内存
            System.exit(0);
        }
    }

    //添加窗口关闭事件
    protected void processWindowEvent(WindowEvent e) {
        if (e.getID() == WindowEvent.WINDOW_CLOSING) {
            System.exit(0);
        }
    }

}