package util;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

public class DBHelper {

//數據庫驅動

? ?private static final String driver = "com.mysql.jdbc.Driver";

? ?//鏈接數據庫的URL地址

? ?private static final String url="jdbc:mysql://localhost:3306/shopping?useUnicode=true&characterEncoding=UTF-8";

? ?//數據庫的用戶名

? ?private static final String username = "root";

? ?//數據庫的密碼

? ?private static final String password = "root";

? ?private static Connection conn = null;

? ?//靜態代碼塊負責加載驅動

? ? static

? ? {

? ? try

? ? {

? ? Class.forName(driver);

? ? }

? ? catch(Exception ex)

? ? {

? ? ex.getStackTrace();

? ? }

? ? }

? ? //單例模式返回數據庫連接對象

? ? public static Connection getConnection() throws Exception

? ? {

? ? if(conn==null)

? ? {

? ? conn = DriverManager.getConnection(url, username, password);

? ? ? ?return conn;

? ? }

? ? return conn;

? ? }

? ??

? ? public static void main(String[] args) {

? ? try

? ? {

? ? Connection conn = DBHelper.getConnection();

? ? if(conn != null)

? ? {

? ? System.out.println("數據庫連接正常！");

? ? }

? ? else

? ? {

? ? System.out.println("數據庫連接異常！");

? ? }

? ? }

? ? catch(Exception ex)

? ? {?

? ? ?ex.getStackTrace();

? ? }

? ?

}

}

這個是報的異常：java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/shopping?useUnicode=true&characterEncoding=UTF-8