Java通過jdbc遠程操控MySQL數據庫

注意事項有以下幾點：
1，MySQL數據庫端要關閉防火牆
2，關於字符集問題要設置好，可以參考以下博客eclipse向MySQL workbench插入中文顯示亂碼
關於解決workbench無法插入中文的問題

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()
    {


    }
     //用於連接數據庫
     private static void connect()
     {
         try
            {
                try
                {
                    Class.forName( "com.mysql.jdbc.Driver");//加載數據庫驅動
                    System.out.println("數據庫驅動加載成功");
                }catch(ClassNotFoundException e){}

                //連接數據庫
                 connection=DriverManager.getConnection("jdbc:mysql://125.250.223.51:3306/words?characterEncoding=utf8","root","");
                //其中125.250.223.51要換成數據庫端所在的IP地址，3306改爲數據庫的端口號 
                 statement=connection.createStatement();



            }catch(Exception e){
                e.printStackTrace();
                System.out.println("sorry,連接失敗");}
     }
     //向數據庫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();
            }
     }
     //刪除數據庫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();
            }
     }
     //隨機從數據庫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("用戶已存在");
            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();
            }
     }
     //用戶的登錄
     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;
     }




}