基本上所有的东西都连接好了，数据库工作正常，除了我不能在控制台上打印任何东西。我不知道如何解决这个问题。请帮帮我

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.*;

class Main{
    private static final String url = "jdbc:mysql://localhost:3306/";
    private static final String user = "root";
    private static final String password = "12345678";
    public static void main(String args[]){
        try {
            Class.forName("com.mysql.jdbc.Driver");//it goes to catch immediately after this line
            Connection con = DriverManager.getConnection(url, user, password);
            Statement stmt = con.createStatement();
            ResultSet rs = stmt.executeQuery("select * from emp");
            while (rs.next()) {
                int price = rs.getInt(3);
                System.out.println(price);
            }
            con.close();
        }
        catch (Exception e) {
            System.out.println(e);
        }

    }
}

它在执行结束时打印的内容：
java.lang.classnotfoundexception:com.mysql.jdbc.driver
进程已完成，退出代码为0