简介
RT
步骤
- 加载驱动
- 链接数据库 DriverManager
- 获取执行sql的对象
- 获得返回的结果集
- 释放连接
code
package com.kuang.lesson01;
import java.sql.*;
/**
* Created by lee on 2021/4/22.
*/
public class JdbcFirstDemo {
public static void main(String[] args) throws SQLException, ClassNotFoundException {
// 加载驱动
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/jdbcstudy?useUnicode=true&characterEncoding=utf8&useSSL=true";
String username = "root";
String password = "123456";
Connection connection = DriverManager.getConnection(url, username, password);
// 执行sql对象
Statement statement = connection.createStatement();
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("PASSWORD=" + resultSet.getObject("PASSWORD"));
System.out.println("email=" + resultSet.getObject("email"));
System.out.println("birth=" + resultSet.getObject("birthday"));
}
resultSet.close();
statement.close();
connection.close();
}
}