Jsp Insert into MySQL database, AES encryption

Jsp code that inserts into a MySQL database, using AES_ENCRYPTION for 128 bit AES encryption of one of the database columns with ON DUPLICATE KEY UPDATE syntax.

<%@page import="java.sql.*"%>
<%@page import="java.io.*"%>

<%
String username = request.getParameter("username");
String password = request.getParameter("password");
String connectionURL = "jdbc:mysql://localhost:3306/handle";
Connection connection = null;
PreparedStatement pstatement = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
int updateQuery = 0;
if(username!=null && password!=null){
            try {
              connection = DriverManager.getConnection (connectionURL, "test", "test");
              String queryString = "INSERT INTO handle(username, password, last_login) VALUES (?, AES_ENCRYPT(?, 'key'), now()) ON DUPLICATE KEY UPDATE last_login=now()";
              /* createStatement() is used for create statement
              object that is used for sending sql statements to 
              the specified database. */
              pstatement = connection.prepareStatement(queryString);
              pstatement.setString(1, username);
              pstatement.setString(2, password);
              pstatement.setString(3, password);
              updateQuery = pstatement.executeUpdate();
              if (updateQuery != 0) { %>
                   
                   
                      
                   
              <%

              }
            } 
            catch (Exception ex)  { %>
                   
                   
                      
                   
              <%

              }

            finally {
                // close all the connections.
                pstatement.close();
                connection.close();
            }
}
%>