JDBC MySQL

JavaJDBC连接MySQL的基本流程。

import java.sql.*;

public class demo01 {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        //1.加载驱动
        Class.forName("com.mysql.jdbc.Driver");

        //2.用户信息和url
        String url = "jdbc:mysql://localhost:3306/jdbcstudy?useUnicode=true&characterEncoding=utf8&useSSL=false";
        String username="root";
        String password="123456";
        //3.连接成功，获得数据库对象 Connection 代表数据库
        Connection connection = DriverManager.getConnection(url, username, password);

        //4.获得执行SQL的对象，Statement
        Statement statement = connection.createStatement();

        //5.用Statement去执行SQL，可能存在结果，查看返回结果
        String sql = "select * from users";
        ResultSet resultSet = statement.executeQuery(sql);
        while (resultSet.next()){
            System.out.println("id=" + resultSet.getObject("id"));
            System.out.println("name=" + resultSet.getObject("name"));
            System.out.println("gender=" + resultSet.getObject("gender"));
            System.out.println("email=" + resultSet.getObject("email"));
            System.out.println("address=" + resultSet.getObject("address"));
            System.out.println("---------------------------");
        }

        //6.释放连接
        resultSet.close();
        statement.close();
        connection.close();
    }
}

JDBC MySQL