原生jdbc--备忘

这主要是为了自己备忘，所以很粗糙。

    public static void main(String[] args) throws Exception {
        // 加载MySQL的JDBC的驱动
        Class.forName("com.mysql.jdbc.Driver");
        Connection con = null;
        PreparedStatement statement = null;
        ResultSet rs = null;
        try {
            con = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/test", "root", "123");
            statement = con.prepareStatement("select * from user");
            rs = statement.executeQuery();

            while(rs.next()){
                System.out.println(rs.getObject(2));
            }
        } catch (Exception e) {
            if(rs != null) rs.close();
            if(statement != null) statement.close();
            if(con != null) con.close();
            e.printStackTrace();
        }

    }