package com.swift;
//這裏導入的包是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包會出錯
            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();
        }
    }
    
}

這裏導入的包是java.sql.Connection而不是com.mysql.jdbc.Connection

java鏈接MySQL數據庫時使用com.mysql.jdbc.Connection的包會出紅線問題