MySQL下载和安装配置
navicat下载安装和激活
使用navicat连接mysql数据库
public Mysqld(String account,String password) { //定义一个数据库的账号和密码 //第一步加载驱动 try { Class.forName("com.mysql.jdbc.Driver"); System.out.println("加载驱动成功"); } catch (Exception e) { // TODO: handle exception System.out.println("加载驱动失败"); } // String uri="jdbc:mysql://localhost:3306/student?characterEncoding=utf-8&useSSL=false"; try { con=DriverManager.getConnection(uri,account,password); System.out.println("数据库连接成功"); } catch (SQLException e) { // TODO: handle exception System.out.println("数据库连接失败"); } }
public static boolean LoginAccount(String account,String password) { Statement sql;//用来执行命令的 ResultSet rs;//定义一个结果 String uri = "select account,password from user"; try { sql = con.createStatement(); rs = sql.executeQuery(uri); while(rs.next()) { String acc=rs.getString(1); String pass=rs.getString(2); if(acc.equals(account)&&pass.equals(password)) { return true; } } } catch (Exception e) { // TODO: handle exception } return false; }
public static void addStudent(String name,String gender,String id,String birthday,String politicaloutlook,String ad,String tel,String number) { PreparedStatement presql; String sqlstr="insert into stu(name,gender,id,birthday,politicaloutlook,ad,tel,number)values(?,?,?,?,?,?,?,?)"; try { presql=con.prepareStatement(sqlstr); presql.setString(1, name); presql.setString(2, gender); presql.setString(3, id); presql.setString(4, birthday); presql.setString(5, politicaloutlook); presql.setString(6, ad); presql.setString(7, tel); presql.setString(8, number); presql.executeUpdate(); JOptionPane.showMessageDialog(null, "添加成功", "添加数据", JOptionPane.WARNING_MESSAGE); String[] data = new String[8]; data[0] = name; data[1] = gender; data[2] = id; data[3] = birthday; data[4] = politicaloutlook; data[5] = ad; data[6] = tel; data[7] = number; Maneger.model.addRow(data); } catch (Exception e) { // TODO: handle exception JOptionPane.showMessageDialog(null, "当前学号已经存在", "添加数据", JOptionPane.WARNING_MESSAGE); } }
public static void delStudent(String id) { PreparedStatement presql; String sqlstr="delete from stu where id=?"; try { presql=con.prepareStatement(sqlstr); presql.setString(1, id); int ok=presql.executeUpdate(); if(ok==0) { JOptionPane.showMessageDialog(null, "未找到相关学号", "删除数据", JOptionPane.WARNING_MESSAGE); }else { JOptionPane.showMessageDialog(null, "删除成功", "删除数据", JOptionPane.WARNING_MESSAGE); } } catch (Exception e) { // TODO: handle exception JOptionPane.showMessageDialog(null, "当前学号已经存在", "添加数据", JOptionPane.WARNING_MESSAGE); } }
public static void changeStudent(String name,String gender,String id,String birthday,String politicaloutlook,String ad,String tel,String number) { PreparedStatement presql; String sqlstr="delete from stu where id=?"; try { presql=con.prepareStatement(sqlstr); presql.setString(1, id); int ok=presql.executeUpdate(); if(ok==0) { JOptionPane.showMessageDialog(null, "未找到相关学号", "删除数据", JOptionPane.WARNING_MESSAGE); }else { sqlstr="insert into stu(name,gender,id,birthday,politicaloutlook,ad,tel,number)values(?,?,?,?,?,?,?,?)"; presql=con.prepareStatement(sqlstr); presql.setString(1, name); presql.setString(2, gender); presql.setString(3, id); presql.setString(4, birthday); presql.setString(5, politicaloutlook); presql.setString(6, ad); presql.setString(7, tel); presql.setString(8, number); ok=presql.executeUpdate(); JOptionPane.showMessageDialog(null, "更改成功", "更改数据", JOptionPane.WARNING_MESSAGE); String[] data = new String[8]; data[0] = name; data[1] = gender; data[2] = id; data[3] = birthday; data[4] = politicaloutlook; data[5] = ad; data[6] = tel; data[7] = number; Maneger.model.addRow(data); } } catch (Exception e) { // TODO: handle exception JOptionPane.showMessageDialog(null, "更改失败", "更改数据", JOptionPane.WARNING_MESSAGE); } }
public static void showAllStudent() { PreparedStatement presql; String sqlstr="select * from stu"; try { presql = con.prepareStatement(sqlstr); ResultSet rs = presql.executeQuery(); LoginEvent.addList(rs); }catch(SQLException e) { } } public static void showStudent(String id) { PreparedStatement presql; String sqlstr="select * from stu"; try { presql = con.prepareStatement(sqlstr); ResultSet rs = presql.executeQuery(); while(rs.next()) { if(rs.getString(2).equals(id)) { String[] data = new String[8]; data[0] = rs.getString(1); data[1] = rs.getString(3); data[2] = rs.getString(2); data[3] = rs.getString(4); data[4] = rs.getString(5); data[5] = rs.getString(6); data[6] = rs.getString(7); data[7] = rs.getString(8); Maneger.model.addRow(data); } } }catch(SQLException e) { } } }