JDBC connection to linked server - sql-server

Question

I'm trying to connect from a Java application to a Linked Server I created with MSSQL Server.
The URL string is
jdbc:sqlserver://172.15.230.11
and the query is
SELECT * FROM OPENQUERY(172.15.230.11,'SELECT * FROM myTable WHERE
myCode = 345')
But when I run the program, this exception occurs:
com.microsoft.sqlserver.jdbc.SQLServerException: Login failed for user 'myUser'.
The actual code is here:
private static final String DB_URL_LOCAL = "jdbc:sqlserver://172.15.230.11";
private static final String DB_USERNAME_LOCAL = "myUser";
private static final String DB_PASSWORD_LOCAL = "myPassword";
private static final String DB_CLASS = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
static String SQL_READ = "SELECT * FROM OPENQUERY(172.15.230.11,'SELECT * FROM myTable WHERE myCode = 345')";
public static void main(String[] args) {
Connection connection = null;
PreparedStatement preparedStatement = null;
ResultSet resultSet = null;
try {
connection = getConnection();
preparedStatement = connection.prepareStatement(SQL_READ);
resultSet = preparedStatement.executeQuery();
} catch (SQLException e) {
e.printStackTrace();
}
}
private static Connection getConnection(){
Connection connection = null;
Properties properties = new Properties();
try {
Class.forName(DB_CLASS);
properties.setProperty("characterEncoding", "utf-8");
properties.setProperty("user", DB_USERNAME_LOCAL);
properties.setProperty("password", DB_PASSWORD_LOCAL);
connection = DriverManager.getConnection(DB_URL_LOCAL, properties);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return connection;
}

Answer 1

First of all you have to make sure that you enable remote connections to MSSQLserver.
Then make sure you use a user in your connection wich has sufficient rights to query your schema.
Then make sure you provide the correct source to the JDBC driver:
dbsource= "jdbc:sqlserver://IP:1433;database=MY_SCHEMA";
Then make sure you load the correct JDBC driver and use the appropriate user and password
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
dbCon = DriverManager.getConnection(dbsource, user, password);
On top of all that, if your database is using windows authentication, then you can use 'integratedSecurity':
dbsource= "jdbc:sqlserver://IP:1433;database=MY_SCHEMA;integratedSecurity=true;";