/*

1載入驅動
2連線資料庫
3向資料庫傳送sql的物件Statement : CRUD
4編寫sql
5執行查詢sql ，返回一個resultSet : 結果集
6關閉連線，釋放資源(一定要做)先開後關

*/
/*
首先新增資料庫依賴
<!--mysql的驅動-->
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>8.0.22</version>
</dependency>
*/

package jdbc;

import java.sql.*;

public class Test {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        //配置資訊
        //useUnicode=true&characterEncoding=utf-8 解決中文亂碼
        String url = "jdbc:mysql://localhost:3306/jdbc?useUnicode=true&characterEncoding=utf-8&serverTimezone=PRC";
        String username = "root";
        String password = "";

        //載入驅動
        Class.forName("com.mysql.cj.jdbc.Driver");
        //連線資料庫
        Connection connection = DriverManager.getConnection(url,username,password);
        //向資料庫傳送sql的物件Statement : CRUD
        Statement statement = connection.createStatement();
        //編寫sql
        String sql = "select * from users";
        //執行查詢sql ，返回一個resultSet : 結果集
        ResultSet rs = statement.executeQuery(sql);
        while (rs.next()){
            System.out.println("id="+rs.getObject("id"));
            System.out.println("name="+rs.getObject("name"));
            System.out.println("password="+rs.getObject("password"));
            System.out.println("email="+rs.getObject("email"));
            System.out.println("birthday="+rs.getObject("birthday"));
        }
        //關閉連線，釋放資源(一定要做)先開後關
        rs.close();
        statement.close();
        connection.close();
    }
}