Adresar

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.List;

import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Text;

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;
import com.mysql.jdbc.Statement;

import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;

public class MySqlExample {

	protected Shell shlMojAdresar;
	private Text txtIme;
	private Text txtPrezime;
	private Text txtEmail;
	private Text txtTelefon;
	private List lstKontakti;

	ArrayList<String> listaKontakata = new ArrayList<String>();



	// parametri za konekciju na bazu
	static String dbHost = "jdbc:mysql://127.0.0.1:3306/adresar1";
	static String dbUser = "root";
	static String dbPass = "";

	// dodatne varijable za mysql
	static Connection conn = null;
	static Statement stmt = null;
	static PreparedStatement pstmt = null;
	static ResultSet rs = null;




	/**
	 * Launch the application.
	 * @param args
	 */
	public static void main(String[] args) {
		try {
			MySqlExample window = new MySqlExample();
			window.open();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * Open the window.
	 */
	public void open() {
		Display display = Display.getDefault();
		createContents();
		shlMojAdresar.open();
		shlMojAdresar.layout();
		while (!shlMojAdresar.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
	}

	/**
	 * Create contents of the window.
	 */
	protected void createContents() {

		shlMojAdresar = new Shell();
		shlMojAdresar.setSize(382, 192);
		shlMojAdresar.setText("Moj adresar");

		final Label lblId = new Label(shlMojAdresar, SWT.NONE);

		// lista je definisana kao globalna
		lstKontakti = new List(shlMojAdresar, SWT.BORDER);
		lstKontakti.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {

				int recordId = lstKontakti.getSelectionIndex();


				// konacno dobijamo ID recorda na koji smo kliknuli
				lblId.setText(String.valueOf(listaKontakata.get(recordId)));

				String sql = "select * from `kontakti` where `id` = '" + lblId.getText() + "'";
				System.out.println(sql);

				try {
					// otvaramo konekciju ka bazi
					conn = (Connection)DriverManager.getConnection(dbHost, dbUser, dbPass);

					stmt = (Statement)conn.createStatement();
					rs = stmt.executeQuery(sql);

					while(rs.next()) {
						//lstKontakti.add(rs.getString("ime") + " " + rs.getString("prezime"));

						if (rs.getString("ime") != null) txtIme.setText(rs.getString("ime")); else txtIme.setText("");
						if (rs.getString("prezime") != null) txtPrezime.setText(rs.getString("prezime")); else txtPrezime.setText("");
						if (rs.getString("telefon") != null) txtTelefon.setText(rs.getString("telefon")); else txtTelefon.setText("");
						if (rs.getString("email") != null)  txtEmail.setText(rs.getString("email")); else txtEmail.setText("");



					}

					// zatvaramo konekciju
					conn.close();
				} catch (SQLException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}




			}
		});
		lstKontakti.setBounds(10, 10, 150, 129);

		txtIme = new Text(shlMojAdresar, SWT.BORDER);
		txtIme.setBounds(238, 10, 118, 21);

		txtPrezime = new Text(shlMojAdresar, SWT.BORDER);
		txtPrezime.setBounds(238, 37, 118, 21);

		txtEmail = new Text(shlMojAdresar, SWT.BORDER);
		txtEmail.setBounds(238, 64, 118, 21);

		txtTelefon = new Text(shlMojAdresar, SWT.BORDER);
		txtTelefon.setBounds(238, 91, 118, 21);

		Button btnOk = new Button(shlMojAdresar, SWT.NONE);
		btnOk.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {

				// ako je vrednost labele 0, radim insert, inace radim update
				String sql = "";
				if (lblId.getText() == "0") {

					sql = "insert into `kontakti` ";
					sql += " (`ime`, `prezime`, `telefon`, `email`) ";
					sql += " values ( ";
					sql += "'" + txtIme.getText() + "', ";
					sql += "'" + txtPrezime.getText() + "', ";
					sql += "'" + txtTelefon.getText() + "', ";
					sql += "'" + txtEmail.getText() + "'";
					sql += ")";

				} else {

					sql = "update `kontakti` set"
							+ "`ime` = '" + txtIme.getText() + "',"
							+ "`prezime` = '" + txtPrezime.getText() + "',"
							+ "`telefon` = '" + txtTelefon.getText() + "',"
							+ "`email` = '" + txtEmail.getText() + "'"
							+ "  where `id` = '" + lblId.getText() + "'";

				}



				System.out.println(sql);

				try {
					conn = (Connection)DriverManager.getConnection(dbHost, dbUser, dbPass);
					stmt = (Statement)conn.createStatement();
					stmt.execute(sql);
					conn.close();
					listContacts();
					lblId.setText("0");
					txtIme.setText("");
					txtPrezime.setText("");
					txtTelefon.setText("");
					txtEmail.setText("");
					txtIme.setFocus();


				} catch (SQLException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}



			}
		});
		btnOk.setBounds(238, 118, 75, 25);
		btnOk.setText("Unesi");

		Label lblNewLabel = new Label(shlMojAdresar, SWT.NONE);
		lblNewLabel.setAlignment(SWT.RIGHT);
		lblNewLabel.setBounds(177, 14, 55, 15);
		lblNewLabel.setText("Ime:");

		Label lblNewLabel_1 = new Label(shlMojAdresar, SWT.NONE);
		lblNewLabel_1.setAlignment(SWT.RIGHT);
		lblNewLabel_1.setBounds(177, 40, 55, 15);
		lblNewLabel_1.setText("Prezime:");

		Label lblNewLabel_2 = new Label(shlMojAdresar, SWT.NONE);
		lblNewLabel_2.setAlignment(SWT.RIGHT);
		lblNewLabel_2.setBounds(177, 67, 55, 15);
		lblNewLabel_2.setText("E-mail:");

		Label lblNewLabel_3 = new Label(shlMojAdresar, SWT.NONE);
		lblNewLabel_3.setAlignment(SWT.RIGHT);
		lblNewLabel_3.setBounds(177, 94, 55, 15);
		lblNewLabel_3.setText("Telefon:");


		lblId.setBounds(177, 118, 55, 15);
		lblId.setText("0");


		listContacts();

	}


	// izlistava sve kontakte
	void listContacts() {

		String sql = "select * from `kontakti` order by `ime`, `prezime`";
		lstKontakti.removeAll();
		listaKontakata.clear();

		try {
			// otvaramo konekciju ka bazi
			conn = (Connection)DriverManager.getConnection(dbHost, dbUser, dbPass);

			stmt = (Statement)conn.createStatement();
			rs = stmt.executeQuery(sql);

			while(rs.next()) {
				lstKontakti.add(rs.getString("ime") + " " + rs.getString("prezime"));
				listaKontakata.add(rs.getString("id"));
			}

			// zatvaramo konekciju
			conn.close();



		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}


	}
}