Java SE 之 数据库操作工具类(DBUtil)设计

//1.加载驱动程序
Class.forName(driveName);
//2.获得数据库连接
Connection connection = DriverManager.getConnection(dbResource,username,password);
//
String sql = "";
//3.获得SQL处理语句
Statement statement = connection.createStatement();
PreparedStatement preparedStatement = connection.prepareStatement(sql); //更为安全
//4.获得SQL执行结果intint
boolean result1 = statement.execute(sql); //执行
int result2 = statement.executeUpdate(sql); //执行更新
ResultSet resultSet = statement.executeQuery(sql);//查询
//1.加载驱动程序
Class.forName(dr