4. JDBC

6. Categorias de Drivers

9. JavaDB = SUN + Apache Derby Embarcado Cliente-Servidor

17. Conectando com o banco - MySQL import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class ExemplolJDBC { public static void main(String[] args) { try { Class. forName ( "com.mysql.jdbc.Driver" ); Connection con = DriverManager. getConnection ( "jdbc:mysql://localhost/posbd4" , "root" , "root" ); System. out .println( "Conectado" ); con.close(); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } } }

18. Conectando com o banco - JavaDB import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class ExemplolJDBC { public static void main(String[] args) { try { Class. forName ( "org.apache.derby.jdbc.EmbeddedDriver" ); Connection con = DriverManager. getConnection ( "jdbc:derby:posbd4; create=true" ); System. out .println( "Conectado" ); con.close(); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } } }

19. Fábrica de conexões - MySQL import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class ConnectionFactory { public static Connection getConnection() throws SQLException { try { Class. forName ( "com.mysql.jdbc.Driver" ); return DriverManager. getConnection ( "jdbc:mysql://localhost/posbd4" , "root" , "root" ); } catch (ClassNotFoundException e) { throw new SQLException(e.getMessage()); } } }

20. Fábrica de conexões - JavaDB import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class ConnectionFactory { public static Connection getConnection() throws SQLException { try { Class. forName ( "org.apache.derby.jdbc.EmbeddedDriver" ); return DriverManager. getConnection ( "jdbc:derby:posbd4; create=true") ; } catch (ClassNotFoundException e) { throw new SQLException(e.getMessage()); } } }

27. Recuperando dados de ResultSets getBigDecimal() DECIMAL

31. Fechando recursos com uso de transação // ... Connection conn = null; try { conn = ConnectionFactory.getConnection(); conn.setAutoCommit( false ); // ... conn.commit(); } catch (SQLException ex) { try { conn.rollback(); } catch (SQLException e) { // ... } } finally { try { conn.close(); } catch (SQLException ex){ // ... } }

39. Versões do JDBC class User { int userID ; String name ; String department ; } interface MyQueries extends BaseQuery { @ Query(sql= "select * from user" ) DataSet getAllUsers(); @ Query(sql= "select * from user where department= {department}" ) DataSet getDepartmentUsers(String department); @ Update(sql= "delete from user where name= {userName}" ) int deleteUser(String userName); @ Update(sql= "update user set department={department} where " + "name= {userName}" ) int updateDeparment(String userName, String department); }

40. Versões do JDBC ... Connection c = myDataSource.getConnection(); MyQueries q = c.createQueryObject(MyQueries. class ); DataSet users = q.getAllUsers(); for (User u: users) { System.out.println( "User's name is: " + user.name; } ... ... Connection c = myDataSource.getConnection(); MyQueries q = c.createQueryObject(MyQueries. class ); DataSet users = q.create(); User user = new User(); user.setUserID(1); user.setName( "Joe" ); user.setDeparment( "Accounting" ); users.insert(user); ...