1、下载数据库驱动

数据库驱动链接：

https://mvnrepository.com/artifact/mysql/mysql-connector-java

2、JDBC 连接 mysql数据库

package web;

import java.sql.*;    //导入sql jar包

public class test{
	 public static void main(String [] args) throws Exception{
		 //1.注册jdbc驱动
		  String driverName="com.mysql.cj.jdbc.Driver";
		//2.获取连接对象
		  String dbURL="jdbc:mysql://127.0.0.1:3306?useSSL=false&serverTimezone=UTC";
		  String userName="root";		
		  String userPwd="123456";//数据库密码（自己设置的）
	try{
		Class.forName(driverName);
		System.out.println("加载驱动成功！");
	}catch(Exception e){
		e.printStackTrace();
		System.out.println("加载驱动失败！");
	}
	try{
		Connection dbConn=DriverManager.getConnection(dbURL,userName,userPwd);
		System.out.println("连接数据库成功！");
	}catch(Exception e){
		e.printStackTrace();
		System.out.print("MySQL80连接失败！");
	}	
		Connection Conn=DriverManager.getConnection(dbURL,userName,userPwd);
		Statement stat=Conn.createStatement();
	}
}

3、注意事项

MySQL8 和 MySQL5 的drive 和 url 的区别：

MySQL8

 String driver = "com.mysql.cj.jdbc.Driver";
 String url="jdbc:mysql://127.0.0.1:3306?useSSL=false&serverTimezone=UTC";

MySQL5

 String driver = "com.mysql.jdbc.Driver";  
 String URL = "jdbc:mysql://localhost:3306";