import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Mydatabase 
{
    static Statement statement;
    static Connection connection;

     public Mydatabase()
    {


    }
     //用於連線資料庫
     private
 
 static void connect()
     {
         try
            {
                try
                {
                    Class.forName( "com.mysql.jdbc.Driver");//載入資料庫驅動
                    System.out.println("資料庫驅動載入成功");
                }catch(ClassNotFoundException e){}

                //連線資料庫
                 connection=DriverManager.getConnection("jdbc:mysql://125.250.223.51:3306/words?characterEncoding=utf8"
 
,"root","");
                //其中125.250.223.51要換成資料庫端所在的IP地址，3306改為資料庫的埠號 
                 statement=connection.createStatement();



            }catch(Exception e){
                e.printStackTrace();
                System.out.println("sorry,連線失敗");}
     }
     //向資料庫word表中插入詞語
     public void insert
 
(String s) throws SQLException
     {

         connect();
         try 
         {
            statement.executeUpdate("INSERT INTO word VALUES ('"+s+"','"+s.length()+"')");
         } catch (SQLException e) {
            System.out.println("已經有這個詞語");
            e.printStackTrace();
            }
         try 
         {
            statement.close();
         } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            }
         try 
         {
            connection.close();
         } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            }
     }
     //刪除資料庫word表的某個詞語
     public void delete(String s )
     {
         connect();
         try 
         {
            statement.executeUpdate("DELETE FROM word WHERE description='"+s+"'");
         } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            }
         try 
         {
            statement.close();
         } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            }
         try 
         {
            connection.close();
         } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            }
     }
     //隨機從資料庫word表中獲得一個詞語
     public String getWord()
     {
         connect();
         ResultSet set=null;
         try {
                set=statement.executeQuery("SELECT*FROM word ORDER BY rand() LIMIT 5");
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
         try {
            while(set.next())
             {
                 return set.getString(1);
             }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
         return "not";

     }
     //賬戶的註冊
     public void register(String user ,String password)
     {
         connect();
         try 
         {
            statement.executeUpdate("INSERT INTO account VALUES ('"+user+"','"+password+"')");
         } catch (SQLException e) {
            System.out.println("使用者已存在");
            e.printStackTrace();
            }
         try 
         {
            statement.close();
         } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            }
         try 
         {
            connection.close();
         } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            }
     }
     //使用者的登入
     public boolean login(String user ,String password)
     {
         connect();
         ResultSet set=null;
         try {
                set=statement.executeQuery("SELECT password FROM account where user='"+user+"'" );
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
         try {
            while(set.next())
             {
                 if(password.equals(set.getString(1)))
                     return true;
                 else
                     return false;
             }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

         return false;
     }




}