导入druid包

package druid;

import com.alibaba.druid.pool.DruidDataSourceFactory;

import javax.sql.DataSource;
import java.io.FileInputStream;
import java.sql.Connection;
import java.util.Properties;

/*
* Druid数据库连接池
* */
public class DruidDemo {

   public static void main(String[] args) throws Exception {
       //1.导入jar包

       //2.定义配置文件

       //3.加载配置文件
       Properties prop =new Properties();
       prop.load(new FileInputStream("jdbc_demo/src/druid.properties"));
       //4.获取连接池对象
       DataSource dataSource = DruidDataSourceFactory.createDataSource(prop);
       //5.获取数据库连接
       Connection connection = dataSource.getConnection();
       System.out.println(connection);

   }
}

注意；

driverClassName=com.mysql.cj.jdbc.Driver