javax.sql.DataSource是java.sql.DriverManager的一个代替，而且建议优先使用DataSource，因为DataSource提供了DriverManager所没有的一些特性，例如连接池、分布式事务。
DataSource是一个接口，它的实现由驱动器的厂商提供，例如mysql Connector/J中的com.mysql.cj.jdbc.MysqlDataSource实现了DataSource：

public class MysqlDataSource extends JdbcPropertySetImpl implements DataSource, Referenceable, Serializable, JdbcPropertySet 

下面代码示例中用了DataSource来获取连接，而没有使用DriverManager：

package com.thb;

import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Enumeration;

import javax.sql.DataSource;

import com.mysql.cj.jdbc.MysqlDataSource;

public class JDBCDemo {

    public static void main(String[] args) throws ClassNotFoundException {       
        String url = "jdbc:mysql://localhost:3306/development";
        String user = "development_user";
        String pass = "test009";
        Connection con = null;
        PreparedStatement stmt = null;
        String sql = "SELECT * FROM test_table";
        Enumeration<Driver> drivers = DriverManager.getDrivers();
        if (drivers.hasMoreElements()) {
            System.out.println("加载的驱动器的类型： "+ drivers.nextElement().getClass().getName());
        }
        
        try {
            DataSource dataSource = new MysqlDataSource();
            ((MysqlDataSource)dataSource).setUrl(url);           
            con = dataSource.getConnection(user, pass);
            stmt = con.prepareStatement(sql);
            ResultSet rs = stmt.executeQuery();
            while (rs.next()) {
                System.out.println(rs.getInt("id"));
                System.out.println(rs.getString("type"));
                System.out.println(rs.getDate("pdate"));
                System.out.println(rs.getBigDecimal("price"));
                System.out.println(rs.getString("description"));                
            }
            rs.close();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                if (stmt != null) {
                    stmt.close();
                }
                if (con != null) {
                    con.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

}

运行输出，得到了正确的结果：

加载的驱动器的类型： com.mysql.cj.jdbc.Driver
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