loginform.java

在管理员表中初始插入数据 usn: admin, pwd: 21232F297A57A5A743894A0E4A801FC3 初始用户账号/密码: admin (密码为 md5 加密) SRC

import javax.swing.*;
import javax.swing.border.TitledBorder;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.*;

public class LoginForm extends JFrame implements ActionListener {
	JButton log, cen;
	JTextField usn;
	JPasswordField pwd;

	public LoginForm() {
		super("登陆系统");
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		JPanel p = new JPanel();
		p.setLayout(null);
		JLabel l1 = new JLabel("用户名:");
		l1.setBounds(5, 5, 75, 25);
		JLabel l2 = new JLabel("密　码:");
		l2.setBounds(5, 32, 75, 25);
		usn = new JTextField();
		usn.setBounds(60, 5, 160, 25);
		pwd = new JPasswordField();
		pwd.setBounds(60, 32, 160, 25);
		p.add(l1);
		p.add(usn);
		p.add(l2);
		p.add(pwd);

		log = new JButton("登 录");
		log.addActionListener(this);
		p.add(log);
		log.setBounds(30, 70, 70, 25);
		cen = new JButton("取 消");
		cen.addActionListener(this);
		p.add(cen);
		cen.setBounds(120, 70, 70, 25);

		this.getContentPane().add(p);
		this.setBounds((Gload.de.width-230)/2, (Gload.de.height-135)/2, 230, 135);
		this.setResizable(false);

		/*Gload.usn = "admin";
		Gload.pwd = "admin";
		Conn.ConnDB();
		new FrmMain().setVisible(true);*/
	}

	private void logOnPress() {
		String s1, s2;
		s1 = Gload.getText(usn);
		s2 = pwd.getText().trim();
		if (s1.equals("") || s1 == null) {
			Gload.MSG(this, "请输入用户名");
			usn.grabFocus();
			return;
		}
		if (s2.equals("") || s2 == null) {
			Gload.MSG(this, "请输入密码");
			pwd.grabFocus();
			return;
		}
		Conn.ConnDB();
		ResultSet rs = Conn.query("select id from 管理员 where usn='" + s1 + "' and pwd='" + new MD5().hashOfStr(s2) + "'");
		try {
			if (rs.next()) {
				Gload.usn = usn.getText();
				Gload.pwd = pwd.getText();
				new FrmMain().setVisible(true);
				this.hide();
			} else {
				Gload.MSG(this, "用户或密码不正确");
			}
			rs.close();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	private void cenOnPress() {
		Gload.exit();
	}

	public static void main(String[] args) {
		new LoginForm().setVisible(true);
	}

	public void actionPerformed(ActionEvent e) {
		Object o = e.getSource();
		if (o.equals(this.log))
			logOnPress();
		else if (o.equals(this.cen))
			this.cenOnPress();
	}

}