jar包

1. 獲得資料庫連線

//關於埠 使用者名稱密碼在mysql中測試後填寫
public class GetConnection {
    private Connection connection =null;
    //連線emptyclassroom資料庫
    private String DatabaseName="emptyclassroom";

    public static final String name = "com.mysql.jdbc.Driver";  
    public static final String user = "資料庫使用者名稱";//預設root  
 

    public static final String password = "資料庫密碼"; //預設root 
    public Connection getCon(){
        String url = "jdbc:mysql://localhost:3306/"+DatabaseName+"?useUnicode=true&characterEncoding=utf8&useSSL=true";
        try{
            Class.forName("com.mysql.jdbc.Driver");

            connection=DriverManager.getConnection(url,user,password);
//          System.out.println(connection.getMetaData().getURL());
 


            return connection;
        }catch(Exception e){
            System.out.println("建立連線失敗");
            e.printStackTrace();
        }
        return null;
    }
    public void closeCon(){
            try { 
                this.connection.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
 

                System.out.println("關閉連線失敗");
                e.printStackTrace();
            }
    }
}