jdbc 原生写法

 <dependency>
         <groupId>mysql</groupId>
         <artifactId>mysql-connector-java</artifactId>
         <version>5.1.6</version>
 </dependency>

package cn.kgc.jdbc;

import java.sql.*;

public class JdbcDemo01 {
    public static void main(String[] args) throws SQLException {

        //注册驱动
        DriverManager.registerDriver(new com.mysql.jdbc.Driver());
        //获取连接，数据库连接地址和账户密码
        Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
        //获取操作数据库的预处理对象
        PreparedStatement preparedStatement = connection.prepareStatement("select * from user");
        //执行SQL语句
        ResultSet resultSet = preparedStatement.executeQuery();
        //遍历结果集
        while (resultSet.next()){
            System.out.println(resultSet.getString("name"));
        }
        //释放资源
        resultSet.close();
        preparedStatement.close();
        connection.close();


    }



}