Question

I’ve designed a database management system using Java and MySQL. I used WAMP as the server. Everything was perfect with that..until now..

Now, I have to go for SQL Express instead of WAMP. I know nothing about SQL Express. I’ve installed it under defaults.

However, now I can connect to the database in Microsoft SQL Server Management Studio with following selections,
(LORDXAX-PC is my computer’s name)

But I need to connect the database with my Java program. (I’ve used JDBC successfully before, with WAMP)

Need help to make this a success?? I’ve tried searching found certain things, but it gives errors. Can someone provide me with clean instructions..

Any help is appreciated. Thanks!

---

EDIT (2)

This is a complete code demonstrating the issue..

package ExpressTest;

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

public class MAIN {

    public static void main(String[] args) {
        new MAIN().start();
    }

    private void start() {
        System.out.println("START");
        String query = "SELECT * FROM logindata";
        getData(query);
        System.out.println("END");
    }

    public ResultSet getData(String query) {
        Connection CON = null;
        try {
            Class.forName("net.sourceforge.jtds.jdbc.Driver");
            CON = DriverManager.getConnection(URL, USER, PASS);
            RESULT = CON.createStatement().executeQuery(query);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return RESULT;
    }
    private String URL = "jdbc:jtds:sqlserver://localhost/brandix;instance=sqlexpress";
    private String USER = "";
    private String PASS = "";
    private static ResultSet RESULT;
}

This is the complete NetBeans output.

run:
START
java.sql.SQLException: Network error IOException: Connection refused: connect
    at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:417)
    at net.sourceforge.jtds.jdbc.ConnectionJDBC3.<init>(ConnectionJDBC3.java:50)
    at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:185)
    at java.sql.DriverManager.getConnection(DriverManager.java:582)
    at java.sql.DriverManager.getConnection(DriverManager.java:185)
    at ExpressTest.MAIN.getData(MAIN.java:24)
    at ExpressTest.MAIN.start(MAIN.java:16)
    at ExpressTest.MAIN.main(MAIN.java:10)
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:519)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
END
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:311)
    at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:261)
    at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:318)
    ... 7 more
BUILD SUCCESSFUL (total time: 7 seconds)

Answer 1

Though many answers are available. I would like to give one.

As you are using Window Authentication.

Change JTDS URL from

private String URL = "jdbc:jtds:sqlserver://localhost/brandix;instance=sqlexpress";

TO

private String URL = "jdbc:jtds:sqlserver://localhost/brandix;instance=sqlexpress;useNTLMv2=tru‌​e;domain=workgroup";

OR Another alternative is:

Download the [Microsoft JDBC driver][1]rather than JTDS.
Add sqljdbc4.jar to your classpath.

Update your connection string (JDBC URL) for you server

Use Class.forName(com.microsoft.sqlserver.jdbc.SQLServerDriver);

URL : jdbc:sqlserver://localhost;user=root;password=‌​123;"

If still problem, persist. Check with,

Enable TCP/IP network protocol, which is disable by default, and set the TCP/IP port to 1433 which is again default port no.

1. Open the SQL Server Configuration Manager
   Start -> Microsoft SQL Server 2008 -> Configuration Tools -> SQL Server Configuration Manager

2. Then at the left hand tree. Select SQL Server 2005 Network Configuration-> Protocol for SQLEXPRESS-> TCP/IP.

3. Right click and enable it.

4. A window box appear on double click the TCP/IP. Click on the “IP Addresses” Tab

5. Set the TCP Port value to 1433 then click apply

6. Restart SQL Service.