java链接MySQL数据库时使用com.mysql.jdbc.Connection的包会出红线问题

package com.swift;
//这里导入的包是java.sql.Connection而不是com.mysql.jdbc.Connection
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class TestJDBC {

    public static void main(String[] args) {
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            //使用com.mysql.jdbc.Connection包会出错
            Connection conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/sw_database?user=root&password=root");
            System.out.println(conn);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    
}