import java.sql.Connection;import java.sql.DriverManager;import java.sql.SQLException;public class ConnectDB {private static final String MYSQL = "jdbc:mysql://";private static final String ORACLE = "jdbc:oracle:thin:@";private ConnectDB() {}public static Connection getInstance(String DBType, String url)throws NoSuchDBException, SQLException {if ("mysql".equalsIgnoreCase(DBType))return getMySqlConn(url);if ("oracle".equalsIgnoreCase(DBType))return getOracleConn(url);return null;}public static void closeConn(Connection conn) {if (conn != null) {try {conn.close();} catch (SQLException e) {e.printStackTrace();}}}private static Connection getMySqlConn(String url) throws SQLException {Connection conn = null;try {Class.forName("com.mysql.jdbc.Driver");} catch (ClassNotFoundException e) {e.printStackTrace();}conn = DriverManager.getConnection(MYSQL + url, "root", "root");return conn;}private static Connection getOracleConn(String url) throws SQLException {Connection conn = null;try {Class.forName("oracle.jdbc.driver.OracleDriver");} catch (ClassNotFoundException e) {e.printStackTrace();}conn = DriverManager.getConnection(ORACLE + url, "scott", "tiger");return conn;}}