package bookshop.util;/** * <p>數(shù)據(jù)專用包 </p> * <p>負(fù)責(zé)數(shù)據(jù)庫的連接，數(shù)據(jù)的插入更新和刪除 </p> * <p>Copyright: wxy Copyright (c) 2004</p> * <p>Company:juanjuan book shop online </p> * @by :wxy * @version 1.0 */import java.sql.*;public class DataBase {  public Connection conn;  public Statement stmt;  public ResultSet rs;  public String sqlStr="";  public DataBase() {  } public boolean connect(){      try{        Class.forName("org.gjt.mm.mysql.Driver").newInstance();        String url ="jdbc:mysql://localhost/BookStore?user=wxy&useUnicode=true&characterEncoding=8859_1";        conn=DriverManager.getConnection(url);         System.out.print("7777777777");        stmt = conn.createStatement ();         System.out.print("44444422222");          rs=stmt.executeQuery("select * from BookAdmin");          while(rs.next()){         System.out.print("名稱: "+rs.getString(1));         System.out.println();                     }      }catch(Exception ee){        System.out.println("connect db error:"+ee.getMessage());        return false;      }      return true;    }    public static void main(String[] args) {           try{            DataBase db = new DataBase();            db.connect();              }catch(Exception e){                e.printStackTrace();                                   }        }}