Accessing MS Sql Server with Java classes - problem connecting to socket

Question

I found an example at this location which uses java classes to connected to MS Sql Server.
http://search400.techtarget.com/tip/1,289483,sid3_gci1065992,00.html
--bummer - it is a login location - so I will include the article
Anyway, the example is using Websphere, but I am still on Jbuilder (will get wsad soon). So I planted the classes from the example in
C:\Borland\JBuilder\jkd1.4\jre\lib\ext\...the classes
Then I copied the code from the example to my jpx project and got an error that it could not connect to the socket. The only thing I changed in the code was the connection string:
--original string from example:
Connection connection = DriverManager.getConnection("jdbc:microsoft:sqlserver://1433", "");
I was getting an error with the 2 argument version of DriverManager - and the second argument here was empty (properties argument). Here was my connection string:
Connection connection = DriverManager.getConnection("jdbc:microsoft:sqlserver://Myserver:1433;User=sa;Password=");
I am only using the 1 argument version of DriverManager. Note that the password=" is blank because my RnD workstation is standalone - no one accesses the sql server except me - so no password. I also left out the last semicolon I noticed. Any suggestions appreciated how I could fix this.
Thanks
source of article:
http://search400.techtarget.com/tip/1,289483,sid3_gci1065992,00.html
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Sample code: Accessing MS SQL Server database from the iSeries
Eitan Rosenberg
09 Mar 2005
Rating: --- (out of 5)
Nowadays with the help of Java the iSeries can be integrated with other databases quite easy. This tip shows you how. The code included here uses the free Microsoft driver that can be downloaded from here. (SQL Server 2000 Driver for JDBC Service Pack 3)
If your SQL server does not include the Northwind Sample Database you can find it here.
http://www.microsoft.com/downloads/details.aspx?familyid=07287b11-0502-461a-b138-2aa54bfdc03a&displaylang=en
The download contains the following files:
msbase.jar
mssqlserver.jar
msutil.jar
Those files needs to be copied to the iSeries directories (/home/r_eitan/ExternalJARs).
Here's the directory structure (on the iSeries) for this sample:
/home/r_eitan/ExternalJARs - Microsoft files (msbase.jar,mssqlserver.jar,msutil.jar)
/home/r_eitan/JdbcTest02 - My code (Main.java,Main.class)
The Java code
import java.sql.*;
import java.io.*;
class Main {
* Connect to Microsoft SQL server and download file northWind.products as tab
* seperated file. (products.txt)
public static void main(String args[]) {
try {
PrintStream outPut = new PrintStream(new BufferedOutputStream(new FileOutputStream("products.txt")));
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
//Connection connection = DriverManager.getConnection("jdbc:microsoft:sqlserver://1433", "");
Connection connection = DriverManager.getConnection("jdbc:microsoft:sqlserver://Myserver:1433;User=sa;Password=");
System.out.println("Connection Done");
connection.setCatalog("northWind");
String sqlCmdString = "select * from products";
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(sqlCmdString);
ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
int columnCount = resultSetMetaData.getColumnCount();
// Iterate throught the rows in resultSet and
// output the columns for each row.
while (resultSet.next()) {
for (int index = 1; index <=columnCount; ++index)
String value;
switch(resultSetMetaData.getColumnType(index))
case 2 :
case 3 :
value = resultSet.getString(index);
break;
default :
value = """ + resultSet.getString(index) + """;
break;
outPut.print(value + (index < columnCount ? "t" : ""));
outPut.println();
outPut.close();
resultSet.close();
connection.close();
System.out.println("Done");
catch (SQLException exception)
exception.printStackTrace();
catch (Exception exception)
exception.printStackTrace();
--------------------------------------------------------------------------------------------------

Answer 1

My guess is that the server's host name isn't right. It necessarily (or even usually) the "windows name" of the computer. Try with the numeric IP address instead (type "ipconfig" to see it).
First aid check list for "connection refused":
- Check host name in connect string.
- Check port number in connect string.
- Try numeric IP address of server host in connect string, in case name server is hosed.
- Are there any firewalls between client and server blocking the port.
- Check that the db server is running.
- Check that the db server is listening to the port. On the server, try: "telnet localhost the-port-number". Or "netstat -an", there should be a listening entry for the port.
- Try "telnet serverhost the-port-number" from the client, to see if firewalls are blocking it.
- If "telnet" fails: try it with the numeric ip address.
- If "telnet" fails: does it fail immediately or after an obvious timeout? How long is the timeout?
- Does the server respond to "ping serverhost" or "telnet serverhost" or "ssh serverhost"?