JAVAÁ¬½ÓACCESS£¬SQL Server,MySQL,Oracle

import java.sql.*;
/*
* JAVAÁ¬½ÓACCESS£¬SQL Server,MySQL,OracleÊý¾Ý¿â
*
* */
public class JDBC {
  
public static void main(String[] args)throws Exception {
  
   Connection conn=null;
  
       //====Á¬½ÓACCESSÊý¾Ý¿â====
   //Á¬½ÓACCESS(·ÇODBCÁ¬½Óģʽ)
   //String dbURL ="jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ=f:/db1.mdb";
  
   //Á¬½ÓACCESS(ODBC -ϵͳDSNÁ¬½Óģʽ)
   //String dbURL="jdbc:odbc:odbcName";
  
   //conn = DriverManager.getConnection(dbURL);//´´½¨Á¬½Ó¶ÔÏó
   //System.out.println("ACCESSÊý¾Ý¿âÁ¬½Ó³É¹¦£¡");
  
  
       //====Á¬½ÓSQLÊý¾Ý¿â====
   /*
   * String dbURL="jdbc:microsoft:sqlserver://localhost:Êý¾Ý¿â¶Ë¿Ú;DatabaseName=Êý¾Ý¿âÃû";
   *
   * */
   //String dbURL="jdbc:microsoft:sqlserver://localhost:7788;DatabaseName=msdb";
   //String userName = "sa";
   //String userPwd = "admin";
   //Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");//¼ÓÔØÇý¶¯
   //conn = DriverManager.getConnection(dbURL,userName,userPwd);//´´½¨Á¬½Ó¶ÔÏó
   //System.out.println("SQLÊý¾Ý¿âÁ¬½Ó³É¹¦£¡");
  
  
       //====Á¬½ÓMySQlÊý¾Ý¿â====
   /*
   * "jdbc:mysql://localhost/Êý¾Ý¿âÃû×Ö?user=Óû§Ãû&password=ÃÜÂë&useUnicode=true&characterEncoding=gb2312";
   *
   * */    
   //String dbURL="jdbc:mysql://localhost/hackwang?user=root&password=hackwang&useUnicode=true&characterEncoding=gb2312";
   //Class.forName("org.gjt.mm.mysql.Driver");//¼ÓÔØÇý¶¯
     //conn = DriverManager.getConnection(dbURL);//´´½¨Á¬½Ó¶ÔÏó
   //System.out.printl