public class Servlet extends javax.servlet.http.HttpServlet {

private static final String URL = "jdbc:sqlserver://****";
private static final String USERNAME = "****";
private static final String PASSWORD = "****";

protected void doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException {



}

protected void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException {

    Connection conn = null;

    try {
        Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
        conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);
        Statement statement = conn.createStatement();
        statement.executeUpdate("INSERT into users (nickname, age, email) VALUES ('Mark', 16, 'markmark@gmail.com');");
        statement.close();
        conn.close();
    } catch (SQLException | ClassNotFoundException e) {
        e.printStackTrace();
    }
}