与SQL Server的Java连接

Question

Ok so I have this code:

package com.andrewxd.banksystem;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class Interface 
    {
        public static void main(String[] args)
        {
            try
            {
                Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");  
                Connection conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1443;user=Andrew;password=andrei23;database=BankSystem");
                System.out.println("test");
                Statement sta = conn.createStatement();
                String Sql = "select * from Clients";
                ResultSet rs = sta.executeQuery(Sql);

                System.out.println(rs.next());
            } catch (Exception e){
                e.printStackTrace();
            }
    }


}

but it gives me this error can somebody help me?:

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost, port 1443 has failed. Error: "Connection refused: connect. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".

I've tried searching but I didn't really understand much.

from what i understand the port is incorrect but how do i find the correct ip/port?

Answer 1

1) Open SQL Server configuration manager and check to see if the TCP/IP under Network configuration protocols is enabled.

2) Under properties of the SQL serve under Connections check to see if Allow remote connections to this server is allowed.

3) Check to see if you can connect via SSMS and query the database.

4) In SQL Server Configuration manager check to see if the SQL Server Browser service is running. (this is not enabled by default nor is it set up to start up automatically by default).

5) If all those are set up then I would check the firewall.

(For anyone that might come across this the solution was to allow SQL Server and windows authentication)

Answer 2

Make sure your sql server configuration -has TCP configured, and configured at that IP address.

You can test a couple things:

1. turn off Windows Firewall, from services.msc.
2. try connecting to SQL Server through the IP address,username,pwd the application is trying to use. (open enterprise manager, connect, enter IP address etc)

Answer 3

尝试将jtds驱动程序用于SQLServer。

Answer 4

Installing Oracle JDBC driver from Here

And with your code looking like this:

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

public class OracleJDBC {

    public static void main(String[] argv) {

        System.out.println("-------- Oracle JDBC Connection Testing ------");

        try {

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

        } catch (ClassNotFoundException e) {

            System.out.println("Where is your Oracle JDBC Driver?");
            e.printStackTrace();
            return;

        }

        System.out.println("Oracle JDBC Driver Registered!");

        Connection connection = null;

        try {

            connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:BankSystem", "Andrew","andrei23");

            } 
        catch (SQLException e) {

            System.out.println("Connection Failed! Check output console");
            e.printStackTrace();
            return;

        }

        if (connection != null) {
            System.out.println("You made it, take control your database now!");
        } else {
            System.out.println("Failed to make connection!");
        }
    }

}

It should probably work, if not, what does the output look like now ? Still equal to what it was before ? Did you check firewalls ? Connectivity to server allowed ?

Answer 5

就我所知，sqlserver的标准端口是1433，而不是1443。