Re: MS SQL Server, JDBC, and Unicode?

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <>
Fri, 10 Jul 2009 20:36:47 -0400
Tom Anderson wrote:

Has anyone made SQL Server work with unicode in java?

I'm working on a system which wants to put unicode in a database. It
does this fine with Oracle, but we haven't been able to make it do so
when the database is SQL Server - and indeed the manufacturers of the
system list this as something that it won't do. Anything that isn't on
the current code page turns into a question mark.

Our columns are nvarchar, and sendStringParametersAsUnicode is true in
the JDBC URL. Is there more than this we need to do?

I've come across mention of a syntax which looks like N'this is a
unicode string' for writing unicode literals in SQL. Do i need to do
that? How do i do that if i'm using PreparedStatements?

We're using the MS driver. An alternative would be the open source jTDS
- any idea if that will fix the problem?

I can't get it not to work.


The following is tested with the MS driver (driver for 2000
against 2000, but I expect 2005 against 2005 to work identical):

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

public class Unicode {
     public static void main(String[] args) throws Exception {
// SQLServer 2000
         Connection con =
"sa", "");
         Statement stmt = con.createStatement();
         stmt.executeUpdate("CREATE TABLE unifun (id INTEGER NOT NULL,
data NVARCHAR(50), PRIMARY KEY(id))");
         stmt.executeUpdate("INSERT INTO unifun VALUES(1,N'?????? the
wrong way')");
         PreparedStatement pstmt = con.prepareStatement("INSERT INTO
unifun VALUES(?,?)");
         pstmt.setInt(1, 2);
         pstmt.setString(2, "?????? the correct way");
         ResultSet rs = stmt.executeQuery("SELECT id,data FROM unifun");
         while( {
             System.out.println(rs.getInt(1) + " : " + rs.getString(2));
         stmt.executeUpdate("DROP TABLE unifun");


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