将android应用连接到本地MS SQL数据库

Question

I'm trying to connect my Android app to my local machine database MS SQL. This is my connection string:

jdbc:jtds:sqlserver://localhost:1433/DajSve;encrypt=false;user=root;password=null;instance=FALE//SQLEXPRESS;

And I got this error:

java.sql.SQLException: Network error IOException: failed to connect to localhost/127.0.0.1 (port 1433): connect failed: ECCONREFUSED (Connection refused)

I tried a lot of things. Changed a connection string a lot of times, enabled TCP/IP and set it to port 1433, also turned off firewall but nothing helped. I'm always getting the same SQL Exception. I'm using SQL Server 2016..

  try {

        Class.forName(className).newInstance();
        connection = DriverManager.getConnection("jdbc:jtds:sqlserver://localhost:1433/DajSve;encrypt=false;user=root;password=null;instance=FALE//SQLEXPRESS;");

        System.out.print("Uspjesno spojeni na bazu");
        Statement stmt = connection.createStatement();
        ResultSet reset = stmt.executeQuery("select * from Korisnik");

        if (!reset.isBeforeFirst() ) {
            System.out.println("nema podataka");
        }else{
            System.out.println("ima podataka");
        }

    } catch (SQLException e) {
        e.printStackTrace();
        System.out.print("Greska pri spajanju na bazu");
    } catch (ClassNotFoundException e){
        System.out.print("Greska - klasa nije pronađena");
    } catch (InstantiationException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }

I know there is a lot of similar questions but none of the answers have helped

Answer 1

failed to connect to localhost/127.0.0.1

Your Android device isn't running a SQL Server. Give the actual server address on your network

It's not a local database when your code exists on a remote device