I need to connect to Sql Server 2008 from java using jdbc 4.0.
I have a very simple code:
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
String connectionUrl = "jdbc:sqlserver://localhost;" +
"integratedSecurity=true;";
Connection con = DriverManager.getConnection(connectionUrl);
But i have this error:
Exception in thread "main" com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost, port 1433 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.".
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:190)
at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:241)
...
I follow this answer:https://stackoverflow.com/a/12524566/1554397
I added jdbc4.jar in Libraries/Compile
SQL Server Browser windows service is running.
In SQL Server Network Configuration i selected Enebled on TCP/IP properties.
I Set TCP Address to 1433.
On Run,VM Options i put -Djava.library.path=my path to sqljdbc_auth.dll
And copy in JDk ,in bin sqljdbc_auth.dll.
What should I do?
EDIT:
When write in cmd telnet localhost 1433 i get 'Could not open connection to the host,on port 1433'
If using Window authentication you can do something like:
String url = "jdbc:sqlserver://MYPC\\SQLEXPRESS;databaseName=MYDB;integratedSecurity=true";
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn = DriverManager.getConnection(url);
and then add the path to sqljdbc_auth.dll as a VM argument (you need sqljdbc4.jar in the build path).
Take a look here for a short step-by-step guide showing how to connect to SQL Server from Java should you need more details. Hope it helps!
Related
I'm trying to connect to a sql server with JDBC in java.
My server uses a windows authentication.
I use this code:
String url = "jdbc:sqlserver://MYPC\\MYSERVER;databaseName=MYDB;integratedSecurity=true";
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn = DriverManager.getConnection(url);
In my classpath i have the file:
jtds-1.3.1.jar and sqljdbc4.jar
And i have a VM argument:
-Djava.library.path="SQLPATH\jtds\x64\SSO"
When i run the code, i have this exception:
com.microsoft.sqlserver.jdbc.SQLServerException: Unable to connect to the host MYPC
Do you know what is wrong?
The URL syntax is jdbc:sqlserver://[serverName[\instanceName][:portNumber]][;property=value[;property=value]]
Did you try to ping your host using ping command ? Or try with IP address.
If //MYPC\\MYSERVER is a network path, I'd imagine it needs to look like this:
\\MYPC\\MYSERVER
Of course, if the SQL Server 2008 instance is setup as the default instance, the \\MYSERVER portion isn't necessary.
I'm getting this 2 errors repeatedly when I'm trying to connect eclipse with sql server through jdbc. Could anyone help me with this or explain why am I getting this?
1. The TCP/IP connection to the host localhost, port 1433 has failed.
2. The driver could not establish a secure connection to SQL Server by using Secure Sockets Layer (SSL) encryption.
Thank you.
String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
Class.forName(driver).newInstance();
String connString ="jdbc:sqlserver://localhost:1433/databaseName=Engg_Street;instance=SQLSERVER;encrypt=true; trustServerCertificate=true";
String username = "Vijayalakshmi";
String password = "";
conn = DriverManager.getConnection(connString,username,password);
You need to Go to Start > Microsoft SQL Server > Configuration Tools > SQL Server Configuration Manager
When it opens Go to
SQL Server Configuration Manager > SQL Server Network Configuration > Protocols for SQLExpress
Where you'll find the Protocol TCP/IP, if disabled then Enable it Click on TCP/IP, You'll find its properties.
In this properties Remove All the TCP Dynamic Ports and Add value of 1433 to all TCP Port
and restart your SQL Server Services > SQL Server
And Its Done...
If you are running SQLSERVER EXPRESS:
Use "SQL Server Configuration Manager" or write "mmc.exe" on Win+R and search "SQL Server Network Configuration", in the "Protocols for SQLEXPRESS" enable the option TCP/IP
I hope than this works for somebody!!
For this kind of issue - you can resolve by checking whether all sql server related services are running or not.
TO check Start -> Run -> services.msc
check services related to sql as
SQL Server (MSSQLSERVER)
SQL Server Agent (MSSQLSERVER)
SQL Server Analysis Services (MSSQLSERVER)
SQL Server Browser
SQL Server Integration Services 10.0
SQL Server Reporting Services (MSSQLSERVER)
SQL Server VSS Writer
Start all the above services. and set to start up type to Automatic.
SQL Active Directory Helper Service is not required to keep running.
It can used to deal with error SQL server connection error 2
and
with
he TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused:
It can used to deal with error SQL server connection error 2 and with he TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused: https://www.youtube.com/watch?v=R8_jjkeulEw
or please check if the table name is duplicated, i changed the table name --> problem solved
I am using
Windows 7
Netbeans IDE 7.1.2
SQL Server Management Studio Express 2005
JDK1.6
I am getting the below error while connecting to the database:
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host has failed. java.net.ConnectException: Connection refused: connect
My connection string is:
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection connection = DriverManager.getConnection(
"jdbc:sqlserver://127.0.0.1:1433;databaseName=dbcm;" +
"user=sa;password=sa");
I've checked below things:
In SQL Server Configuration Manager, Protocols for SQLEXPRESS : TCP/IP Enabled
In fact I made enable remaining 3 too.
SQL Server(SQLExpress) and SQL Browser Service both are running.
I followed the steps below to successfully connect to an SQLExpress instance using JDBC:
Configure TCP/IP communication with SQL Express
Open SQL Server Configuration Manager.
Go to SQL Server Network Configuration -> Protocols for SQLEXPRESS
Set the status of TCP/IP protocol to "Enabled" (if it is already not).
Open Properties window for TCP/IP, go to IP Addresses section.
Go to the bottom of this property page and set the TCP Port under IPAll to 1433.
Connect to the SQLExpress instance using Microsoft's JDBC driver for SQL Server
JDBC URL: jdbc:sqlserver://localhost;instance=SQLEXPRESS;databaseName=<your DB>;user=<your User>;password=<your Passwd>
I have a java program that connects to a MS SQL database. The program works perfectly when running through eclipse however I get an error when I run it through AIX:
java.sql.SQLException: Network error IOException: A remote host refused an attempted connect operation.
I am using jtds to connect:
String connectionString = "jdbc:jtds:sqlserver://"+dropez_ip_address+"/"+dropez_db_name;
ResultSet rs = null;
Statement stmt = null;
try{
Class.forName("net.sourceforge.jtds.jdbc.Driver");
Connection conn = DriverManager.getConnection(connectionString, dropez_db_username, dropez_db_password);
stmt = conn.createStatement();
}catch(Exception e){}
From jTDS documentation:
Why do I get java.sql.SQLException: "Network error IOException: Connection refused: connect" when trying to get a connection?
The "Connection refused" exception is thrown by jTDS when it is unable to connect to the server. There may be a number of reasons why this could happen:
The server name is misspelled or the port number is incorrect.
SQL Server is not configured to use TCP/IP. Either enable TCP/IP from SQL Server's Network Utility app or have jTDS connect via named pipes (see the URL format for information on how to do this).
There is a firewall blocking port 1433 on the server.
To check whether TCP/IP is enabled and the port is not blocked you can use "telnet 1433". Until telnet doesn't connect, jTDS won't either. If you can't figure out why, ask your network administrator for help.
My bet is your firewall does not allow the AIX host to connect.
I've tryed to create a connection with a Microsoft SQl Server 2008 database through JDBC on Eclipse SDK. I've dowloaded JDBC driver from microsoft and I've installed it, then I've added at my System environment variables CLASSPATH the path of sqljdbc4.jar file. After icluding in the Eclipse project the jar file I've tryed to create the connection using:
String connectionUrl = "jdbc:sqlserver://localhost;integratedSecurity=true";
Connection con = DriverManager.getConnection(connectionUrl);
but it doesn't works, and launch me this exception:
com.microsoft.sqlserver.jdbc.SQLServerException: TCP/IP connection
at host localhost, port 1433 failed. Error: "Connection refused:
connect. Verify connection properties and make sure an instance of SQL
Server is running on the host and is accepting TCP/IP connections at
the port. Be sure no firewall blocks connections at the port.
I'm working on a JRE 1.6 so a sqljdbc4 should work, and I've created a working ODBC, so the server is responding, and the error should be in java command or JDBC installation.
Can anyone help me?
At the risk of stating the obvious, this looks to me as if TCP connections haven't been enabled on SQL Server. You have to manually enable them, they don't come enabled by default.
There's an article on MSDN here which explains how to enable TCP protocols for SQL 2005/2008.
Following are the quick trouble shooters:
Try to connect to your server using external front end.
Check if your firewall blocks the connection to the port
Check to see if server is really up.
A Suggestion :
If you are using eclipse , you don't need to add the jar into CLASSPATH variable , you can just add it in library of your project to make it available at runtime