代碼如下import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;import javax.swing.JOptionPane;public class mysql {public static void main(String[] args) {     String driver = "com.mysql.jdbc.Driver";       // URL指向要訪問的數(shù)據(jù)庫名     String url = "jdbc:mysql://localhost:3306/test";       // MySQL配置時(shí)的用戶名       String user = "root";       // Java連接MySQL配置時(shí)的密碼       String password = "123456";       try {           // 加載驅(qū)動(dòng)程序           Class.forName(driver);           // 連續(xù)數(shù)據(jù)庫           Connection conn = DriverManager.getConnection(url, user, password);           if(!conn.isClosed())           System.out.println("Succeeded connecting to the Database!");       } catch(ClassNotFoundException e) {              System.out.println("Sorry,can`t find the Driver!");              e.printStackTrace();          } catch(SQLException e) {              e.printStackTrace();          } catch(Exception e) {              e.printStackTrace();          }      }}然后提示錯(cuò)誤，Sorry,can`t find the Driver!java.lang.ClassNotFoundException: com.mysql.jdbc.Driverat java.net.URLClassLoader$1.run(URLClassLoader.java:366)at java.net.URLClassLoader$1.run(URLClassLoader.java:355)at java.security.AccessController.doPrivileged(Native Method)at java.net.URLClassLoader.findClass(URLClassLoader.java:354)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)at java.lang.Class.forName0(Native Method)at java.lang.Class.forName(Class.java:190)at mysql.main(mysql.java:25)，怎么解啊//、