JDBC简介以及快速入门

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
 
 
public class Main {
 
    //JDBC的快速入门
    public static void main(String[] args) throws Exception {
        //注册驱动
        Class.forName("com.mysql.cj.jdbc.Driver");
 
        //获取连接
        String url = "jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useSSL=false";
        String username = "root";
        String password = "123456";
        Connection conn = DriverManager.getConnection(url, username, password);
 
        //定义SQL语句
        String sql = "update tbl_user set age = 1 where id=1";
 
        //获取执行SQL的对象
        Statement stmt = conn.createStatement();
 
        //执行SQL
        int count1 = stmt.executeUpdate(sql);
 
        //处理结果
        System.out.println(count1);
 
        //释放资源
        stmt.close();
        conn.close();
    }
 
}