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I am running Ubuntu 16.04 and using SQL Server Express and Oracle Java 9:

$ java --version
java 9.0.1
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)

I have installed SQL Server jdbc driver (sqljdbc_6.2.2.0_enu.tar.gz in https://www.microsoft.com/en-us/download/details.aspx?id=55539)

/home/t/program_files/RDBMS/JDBC/mssqlserverjdbc_6.0/enu/jre8/sqljdbc42.jar

I wrote some simple code to test using the driver :

// JDBC driver name and database URL                                                                                                                                       
String JDBC_DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
// static final String DB_URL = "jdbc:mysql://localhost/"; // connect to a DBMS                                                                                            
String DB_URL = "jdbc:microsoft:sqlserver://localhost/STUDENTS"; // connect to a specific database in a DBMS                                                               
//  Database credentials                                                                                                                                                   
String USER = "SA";
String PASS = "password";

//Register JDBC driver                                                                                                                                                     
try{
    Class.forName(JDBC_DRIVER);
}catch(Exception e){ //Handle errors for Class.forName                                                                                                                     
    e.printStackTrace();
}

    //Open a connection                                                                                                                                                    
System.out.println("Connecting to database...");

try(Connection conn = DriverManager.getConnection(DB_URL, USER, PASS); // connect to DBMS, not to a DB                                                                     
    Statement st = conn.createStatement()){

}catch(SQLException se){ //Handle errors for JDBC                                                                                                                          
    se.printStackTrace();
}

Compilation is fine:

$ javac BasicOperations.java

Running isn't.

$ java -cp .:/home/t/program_files/RDBMS/JDBC/mssqlserverjdbc_6.0/enu/jre8/sqljdbc42.jar BasicOperations
Connecting to database...
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost/STUDENTS, port 1433 has failed. Error: "localhost/STUDENTS. Verify the connection pro\
perties. 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:191)
        at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:242)
        at com.microsoft.sqlserver.jdbc.SocketFinder.findSocket(IOBuffer.java:2369)
        at com.microsoft.sqlserver.jdbc.TDSChannel.open(IOBuffer.java:551)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1963)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:1628)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:1459)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:773)
        at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1168)
        at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:678)
        at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:229)
        at BasicOperations.main(BasicOperations.java:46)

How shall I solve the problem? Is it correct that I should do equivalence to https://stackoverflow.com/a/12430561/1224441 on Ubuntu? Because I am using SQL Server Express on Ubuntu, I only know how to access it on terminal using sqlcmd.

Thanks.

  • Have you followed the instructions in the error message? – Mark Rotteveel Dec 06 '17 at 08:36
  • Connection URL should looks like this: jdbc:sqlserver://localhost\STUDENTS If it will not work then you need to find on what port SQL Server is running and add it to the connection URL – Ivan Dec 06 '17 at 15:17
  • @Ivan: Thanks. That solves my problem. –  Dec 06 '17 at 15:47

0 Answers0