How to connect to database in web service??

Question

Hi all,
How to connect to database in web service ? Can anyone give some advice what kind of database should i use? thanks

Answer 1

No difference. Just connect as usual!
Let me give you an example:
Code to connect to postgresql db ...
public Connection connectPostgresql(String servername, String dbname, String username, String password)
          Connection conn = null;
          try
                    // Load the JDBC driver
                    String driverName = "org.postgresql.Driver";
                    Class.forName(driverName);
                    // Create a connection to the database
                    String url = "jdbc:postgresql://" + servername +  "/" + dbname;
                    conn = DriverManager.getConnection(url, username, password);
                    return conn;               
          catch (ClassNotFoundException e)
                    // Could not find the database driver
                    return conn;
          catch (SQLException e)
                    // Could not connect to the database
                    return conn;
}Code for an axis web service ...
public Element[] updateProfile(Element[] params)
          String message = "";
          // get str 1
          Node node1 = params[0].getFirstChild();
          String str1= node1.getNodeValue();
          // get str 2
          Node node2 = params[1].getFirstChild();
          String str2= node2.getNodeValue();
          Connection conn = connectPostgresql ("localhost","myDatabase","myUsername","myPassword");
          // there is a method to insert these params to db
          boolean isInserted = insertParams(conn, str1, str2);
          if(isInserted )
                    message = "OK";
          else
                    message = "Not OK";
          // constructs an array of DOM Elements for message to send back to client
          SOAPBodyElement[] response = new SOAPBodyElement[1];
          response[0] = new SOAPBodyElement(XMLUtils.StringToElement("urn:foo", "e1", message));
          return response;
}Gokce.