JAVA kód k vytvoření uživatelského účtu do SQL databáze.
Zdroj:
www.sourcecodester.com import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import java.lang.*;
public class UserSettings extends JFrame implements ActionListener{
JLabel lblUser = new JLabel("Username ",JLabel.RIGHT);
JLabel lblPass = new JLabel("Password ",JLabel.RIGHT);
JLabel lblName1 = new JLabel("First Name",JLabel.RIGHT);
JLabel lblName2 = new JLabel("Family Name",JLabel.RIGHT);
JTextField txtUser = new JTextField(20);
JPasswordField txtPass= new JPasswordField(20);lll
JTextField txtName1= new JTextField(20);
JTextField txtName2= new JTextField(20);
JButton btnNew = new JButton("Add");
JButton btnUpdate = new JButton("Edit");
JButton btnDelete = new JButton("Delete");
JButton btnSearch = new JButton("Search");
JButton btnExit = new JButton("Exit");
Connection cn;
Statement st;
PreparedStatement ps;
public void clear(){
txtUser.setText("");
txtPass.setText("");
txtName1.setText("");
txtName2.setText("");
}
public UserSettings() {
super("User Account Settings");
JPanel pane = new JPanel();
pane.setLayout(null);
lblUser.setBounds(5,50,80,25);
pane.add(lblUser);
txtUser.setBounds(90,50,150,25);
pane.add(txtUser);
lblUser.setForeground(Color.white);
lblPass.setBounds(5,85,80,25);
pane.add(lblPass);
txtPass.setBounds(90,85,150,25);
txtPass.setEchoChar('*');
pane.add(txtPass);
lblPass.setForeground(Color.white);
lblName1.setBounds(5,120,80,25);
pane.add(lblName1);
txtName1.setBounds(90,120,150,25);
pane.add(txtName1);
lblName1.setForeground(Color.white);
lblName2.setBounds(5,155,80,25);
pane.add(lblName2);
txtName2.setBounds(90,155,150,25);
pane.add(txtName2);
lblName2.setForeground(Color.white);
btnNew.setBounds(5,190,75,35);
pane.add(btnNew);
btnNew.addActionListener(this);
btnUpdate.setBounds(80,190,75,35);
pane.add(btnUpdate);
btnUpdate.addActionListener(this);
btnDelete.setBounds(155,190,75,35);
pane.add(btnDelete);
btnDelete.addActionListener(this);
btnSearch.setBounds(230,190,75,35);
pane.add(btnSearch);
btnSearch.addActionListener(this);
btnExit.setBounds(130,260,75,35);
pane.add(btnExit);
pane.setBackground(Color.black);
btnExit.addActionListener(this);
setContentPane(pane);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
pane.setBorder(BorderFactory.createTitledBorder(
BorderFactory.createEtchedBorder(), "Creating User Account"));
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
cn = DriverManager.getConnection("jdbc:odbc:User");
}catch(ClassNotFoundException e) {
System.err.println("Failed to load driver");
e.printStackTrace();
}
catch(SQLException e){
System.err.println("Unable to connect");
e.printStackTrace();
}
}
public void actionPerformed(ActionEvent e){
Object source = e.getSource();
if(source == btnNew){
try{
String uname=txtUser.getText();
String pass=txtPass.getText();
String name1=txtName1.getText();
String name2=txtName2.getText();
if (!uname.equals("") && !pass.equals("")&& !name1.equals("") && !name2.equals("")) {
st= cn.createStatement();
ps=cn.prepareStatement("INSERT INTO Login" + " (username,password,name1,name2) " + " VALUES(?,?,?,?)");
ps.setString(1,txtUser.getText());
ps.setString(2,txtPass.getText());
ps.setString(3,txtName1.getText());
ps.setString(4,txtName2.getText());
ps.executeUpdate();
JOptionPane.showMessageDialog(null,"New account has been successfully added.","Payroll System: User settings",JOptionPane.INFORMATION_MESSAGE);
txtUser.requestFocus(true);
st.close();
clear();
}
else{
JOptionPane.showMessageDialog(null,"Please Fill Up The Empty Fields","Warning",JOptionPane.WARNING_MESSAGE);
}
}catch(SQLException sqlEx){
sqlEx.printStackTrace();
JOptionPane.showMessageDialog(null,"Unable to save!.","Payroll System: User settings",JOptionPane.ERROR_MESSAGE);}
}
if(source == btnSearch){
try{
String sUser ="";
int tmp= 0;
clear();
sUser = JOptionPane.showInputDialog(null,"Enter Username to search.","Payroll System: User settings",JOptionPane.QUESTION_MESSAGE);
st= cn.createStatement();
ResultSet rs=st.executeQuery("SELECT * FROM Login WHERE username = '" + sUser + "'");
while(rs.next()){
txtUser.setText(rs.getString(1));
txtPass.setText(rs.getString(2));
txtName1.setText(rs.getString(3));
txtName2.setText(rs.getString(4));
tmp=1;
}
st.close();
if (tmp==0){
JOptionPane.showMessageDialog(null,"No record found!!.","Payroll System: User settings",JOptionPane.INFORMATION_MESSAGE);
}
}catch(SQLException s){
JOptionPane.showMessageDialog(null,"Unable to search!.","Payroll System: User settings",JOptionPane.ERROR_MESSAGE);
System.out.println("SQL Error" + s.toString() + " " + s.getErrorCode() + " " + s.getSQLState());
}
}
if(source == btnUpdate){
try{
String uname=txtUser.getText();
String pass=txtPass.getText();
String name1=txtName1.getText();
String name2=txtName2.getText();
if (!uname.equals("") && !pass.equals("")&& !name1.equals("") && !name2.equals("")) {
st= cn.createStatement();
PreparedStatement ps = cn.prepareStatement("UPDATE Login SET password = '" + txtPass.getText() + "',name1 = '" + txtName1.getText() + "',name2= '" + txtName2.getText()+ "'WHERE username = '" + txtUser.getText() + "'");
ps.executeUpdate();
JOptionPane.showMessageDialog(null,"Account has been successfully updated.","Payroll System: User settings",JOptionPane.INFORMATION_MESSAGE);
txtUser.requestFocus(true);
clear();
st.close();
}
else{
JOptionPane.showMessageDialog(null,"Please Fill Up The Empty Fields","Warning",JOptionPane.WARNING_MESSAGE);
}
}catch (SQLException y){
JOptionPane.showMessageDialog(null,"Unable to update!.","Payroll System: User settings",JOptionPane.ERROR_MESSAGE);
}
}
if(source==btnDelete){
try{
PreparedStatement ps = cn.prepareStatement("DELETE FROM Login WHERE username ='"+ txtUser.getText() + "'");
ps.executeUpdate();
JOptionPane.showMessageDialog(null,"Account has been successfully deleted.","Payroll System: User settings ",JOptionPane.INFORMATION_MESSAGE);
txtUser.requestFocus(true);
clear();
st.close();
}catch(SQLException s){
JOptionPane.showMessageDialog(null,"Unable to delete!.","Payroll System: User settings",JOptionPane.ERROR_MESSAGE);}
}if(source==btnExit){
dispose();
}
}
// public void frameUser(){
public static void main(String[]args){
UserSettings panel = new UserSettings();
panel.setSize(370,350);
panel.setVisible(true);
panel.setLocation(350,200);
panel.setResizable(false);
}
}
