Connessione.java. package model.entity; import java.sql.connection; public class Connessione { public Connection objconn;
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1 Connessione.java package model.entity; import java.sql.connection; public class Connessione public Connection objconn; public void apri() try Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); this.objconn = DriverManager.getConnection("jdbc:odbc:DBCorso"); catch(classnotfoundexception oerrore) oerrore.printstacktrace(); catch (SQLException osql) osql.printstacktrace(); public void chiudi() try this.objconn.close(); catch (SQLException osql) osql.printstacktrace();
2 Docente.java package model.session; import java.util.arraylist; public class Docente //Sezione attributi private int chiave; private String cognome; private String nome; private DocenteSet oggettoset; //Sezione metodi lettura / scrittura public String getcognome() return cognome; public void setcognome(string cognome) this.cognome = cognome; public String getnome() return nome; public void setnome(string nome) this.nome = nome; public int getchiave() return chiave; //Sezione costruttori public Docente() this.inizializza(); private void inizializza() this.chiave =0; this.setcognome(""); this.setnome(""); this.oggettoset = new DocenteSet(); public Docente(int chiave) this.inizializza(chiave); private void inizializza(int chiave) this.oggettoset = new DocenteSet(chiave); this.chiave = chiave; this.setcognome(oggettoset.cognome); this.setnome(oggettoset.nome); //Sezione metodi di oggetto //Sezione di Classe public static ArrayList<String[]> elenco ()
3 Page 2 Docente.java return DocenteSet.lista(); public static ArrayList<Docente> elencoobj () ArrayList<Docente> elenco = new ArrayList<Docente>(); ArrayList<Integer> chiavi = DocenteSet.listaChiavi(); for (int i = 0; i < chiavi.size(); i++) elenco.add(new Docente(chiavi.get(i)));
4 DocenteSet.java package model.entity; import java.sql.preparedstatement; public class DocenteSet //Sezione medtodi pubblici public int IDDocente; public String Cognome; public String Nome; //Sezione Costruttori public DocenteSet() public DocenteSet(int IDDocente) this.estrai(iddocente); private void estrai(int iddocente) String sql = "Select * from Docente where IDDocente =?"; try PreparedStatement pstdocente = oconnessione.objconn.preparestatement(sql); pstdocente.setint(1, iddocente); ResultSet rsdocente = pstdocente.executequery(); rsdocente.next(); this.iddocente = iddocente; this.cognome = rsdocente.getstring("cognome"); this.nome = rsdocente.getstring("nome"); catch (Exception e) finally //Sezione dei metodi operanti sulla tupla //Sezione metodi operanti su più tuple public static ArrayList<String[]> lista() String sql = "Select * from Docente"; ArrayList<String[]> elenco = new ArrayList<String[]>(); try PreparedStatement pstelenco = oconnessione.objconn.preparestatement(sql); ResultSet rselenco = pstelenco.executequery(); while (rselenco.next()) String[] docente = new String [3]; docente[0] = rselenco.getstring("iddocente");
5 Page 2 DocenteSet.java docente[1] = rselenco.getstring("cognome"); docente[1] = rselenco.getstring("nome"); elenco.add(docente); catch (Exception e) finally public static ArrayList<Integer> listachiavi() String sql = "Select IDDocente from Docente"; ArrayList<Integer> elenco = new ArrayList<Integer>(); try PreparedStatement pstelenco = oconnessione.objconn.preparestatement(sql); ResultSet rselenco = pstelenco.executequery(); while (rselenco.next()) elenco.add(rselenco.getint("iddocente")); catch (Exception e) finally
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