房屋租赁管理系统主要完成功能为:
1.运行环境: jdk 17;
2.编辑器:IDEA;
3.数据库:MySql 5.7/8.0等版本均可;
因为上传资源限制所以展示了部分功能
package dao; import model.Admin; import java.sql.*; public class HouseDao { private static String dbClassName = "com.mysql.cj.jdbc.Driver"; private static String dbUrl = "jdbc:mysql://localhost:3306/房屋租赁管理系统?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8"; // 改成自己的端口号这里默认端口号为3306 private static String dbUser = "root"; // 需改成自己数据库的用户名 private static String dbPwd = "123456"; // // 需改成自己数据库的密码 public static Connection conn = null; // 构造方法,获取连接 public HouseDao() { try { if (conn == null) { Class.forName(dbClassName); conn = DriverManager.getConnection(dbUrl, dbUser, dbPwd); } } catch (Exception e) { e.printStackTrace(); } } // 关闭连接 public static void close() { try { if (conn != null) conn.close(); } catch (Exception e) { e.printStackTrace(); } finally { conn = null; } } public static void main(String[] args) { try { if (HouseDao.conn != null) { System.out.println("数据库连接成功!"); } else { System.out.println("数据库连接失败!"); } } catch (Exception e) { e.printStackTrace(); } finally { close(); // 关闭连接 } } public static Admin check(String username, String password) { Admin Admin = new Admin(); String sql = "select * from 管理员账户 where 用户名 = '" + username + "' and 密码 = '" + password + "'"; try { ResultSet rs = HouseDao.executeQuery(sql); if (rs.next()) { Admin.setId(rs.getString("id")); Admin.setName(rs.getString("用户名")); Admin.setPassword(rs.getString("密码")); } else return null; } catch (Exception e) { e.printStackTrace(); } HouseDao.close(); return Admin; } // 执行查询 public static ResultSet executeQuery(String sql) { try { if (conn==null) new HouseDao(); return conn.createStatement().executeQuery(sql); } catch (Exception e) { e.printStackTrace(); return null; } } // 执行更新 public static int executeUpdate(String sql) { try { if (conn==null) new HouseDao(); return conn.createStatement().executeUpdate(sql); } catch (Exception e) { e.printStackTrace(); return -1; } } }
package main; import dao.HouseDao; import model.Admin; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Login extends JFrame { private static Admin user = null; public static void main(String[] args) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch(Exception e) { e.printStackTrace(); } Login frame = new Login(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } public Login() { initComponents(); } private void login(ActionEvent e) { // TODO add your code here Admin admin = HouseDao.check(username.getText(),password.getText()); if (admin == null) { JOptionPane.showMessageDialog(null,"登录失败!"); } else { // System.out.println(Admin.getName()); JOptionPane.showMessageDialog(null, "登录成功!"); user = admin; new HouseFrame().setVisible(true); dispose(); } } private void cancel(ActionEvent e) { // TODO add your code here dispose(); } private void passwordTFKeyTyped(KeyEvent e) { // TODO add your code here if (e.getKeyChar() == '\n') { loginButton.doClick(); } }
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